Varying the properties of the Create Activity

Example 1: default

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": "http://host.test/some/actor",
  "cc": [],
  "id": "http://host.test/activities/RjdDfK6fLrQo-OeF",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "text",
    "id": "http://host.test/objects/pdIaXrrstUKcu3rG",
    "published": "2026-04-08T07:53:32Z",
    "tag": [
      {
        "href": "http://other.test/some/actor",
        "type": "Mention"
      }
    ],
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Note"
  },
  "published": "2026-04-08T07:53:32Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "text",
  "id": "http://host.test/objects/pdIaXrrstUKcu3rG",
  "published": "2026-04-08T07:53:32Z",
  "tag": [
    {
      "href": "http://other.test/some/actor",
      "type": "Mention"
    }
  ],
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Note"
}

Example 2: without published

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": "http://host.test/some/actor",
  "cc": [],
  "id": "http://host.test/activities/XMVI6fRKHwlYHkRO",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "text",
    "id": "http://host.test/objects/L4t9P8pH6Zh8ZE2F",
    "published": "2026-04-08T07:53:32Z",
    "tag": [
      {
        "href": "http://other.test/some/actor",
        "type": "Mention"
      }
    ],
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Note"
  },
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "text",
  "id": "http://host.test/objects/L4t9P8pH6Zh8ZE2F",
  "published": "2026-04-08T07:53:32Z",
  "tag": [
    {
      "href": "http://other.test/some/actor",
      "type": "Mention"
    }
  ],
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Note"
}

Example 3: null @context

Comments

Validation of activity against schema failed

None is not valid under any of the given schemas

Failed validating 'anyOf' in schema['properties']['@context']:
    {'anyOf': [{'type': 'string'}, {'items': {}, 'type': 'array'}],
     'examples': ['https://www.w3.org/ns/activitystreams',
                  ['https://www.w3.org/ns/activitystreams',
                   {'Hashtag': 'as:Hashtag'}]]}

On instance['@context']:
    None

Activity

{
  "@context": null,
  "actor": "http://host.test/some/actor",
  "cc": [],
  "id": "http://host.test/activities/1On0u95PHC8NWLbM",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "text",
    "id": "http://host.test/objects/ris853WWZQ2bGcnL",
    "published": "2026-04-08T07:53:32Z",
    "tag": [
      {
        "href": "http://other.test/some/actor",
        "type": "Mention"
      }
    ],
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Note"
  },
  "published": "2026-04-08T07:53:32Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "text",
  "id": "http://host.test/objects/ris853WWZQ2bGcnL",
  "published": "2026-04-08T07:53:32Z",
  "tag": [
    {
      "href": "http://other.test/some/actor",
      "type": "Mention"
    }
  ],
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Note"
}

Example 4: null actor

Comments

Validation of activity against schema failed

None is not of type 'string'

Failed validating 'type' in schema['properties']['actor']:
    {'description': 'id of the actor performing this activity',
     'examples': ['https://actor.example/'],
     'type': 'string'}

On instance['actor']:
    None

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": null,
  "cc": [],
  "id": "http://host.test/activities/rs0v8BId09E5ktUQ",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "text",
    "id": "http://host.test/objects/Gu_BxrxLVNBgDE7Q",
    "published": "2026-04-08T07:53:32Z",
    "tag": [
      {
        "href": "http://other.test/some/actor",
        "type": "Mention"
      }
    ],
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Note"
  },
  "published": "2026-04-08T07:53:32Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "text",
  "id": "http://host.test/objects/Gu_BxrxLVNBgDE7Q",
  "published": "2026-04-08T07:53:32Z",
  "tag": [
    {
      "href": "http://other.test/some/actor",
      "type": "Mention"
    }
  ],
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Note"
}

Example 5: null id

Comments

Validation of activity against schema failed

None is not of type 'string'

Failed validating 'type' in schema['properties']['id']:
    {'description': 'id of the activity or object',
     'examples': ['https://actor.example/some_id'],
     'type': 'string'}

On instance['id']:
    None

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": "http://host.test/some/actor",
  "cc": [],
  "id": null,
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "text",
    "id": "http://host.test/objects/fWIw_9lCIHveFYt0",
    "published": "2026-04-08T07:53:32Z",
    "tag": [
      {
        "href": "http://other.test/some/actor",
        "type": "Mention"
      }
    ],
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Note"
  },
  "published": "2026-04-08T07:53:32Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "text",
  "id": "http://host.test/objects/fWIw_9lCIHveFYt0",
  "published": "2026-04-08T07:53:32Z",
  "tag": [
    {
      "href": "http://other.test/some/actor",
      "type": "Mention"
    }
  ],
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Note"
}

Example 6: null published

Comments

Validation of activity against schema failed

None is not of type 'string'

Failed validating 'type' in schema['properties']['published']:
    {'description': 'Moment of this activity or object being published',
     'format': 'date-time',
     'type': 'string'}

On instance['published']:
    None

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": "http://host.test/some/actor",
  "cc": [],
  "id": "http://host.test/activities/IIgH13Z8x08s7Y4t",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "text",
    "id": "http://host.test/objects/7axWpK7PnFZ53ZPT",
    "published": "2026-04-08T07:53:32Z",
    "tag": [
      {
        "href": "http://other.test/some/actor",
        "type": "Mention"
      }
    ],
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Note"
  },
  "published": null,
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "text",
  "id": "http://host.test/objects/7axWpK7PnFZ53ZPT",
  "published": "2026-04-08T07:53:32Z",
  "tag": [
    {
      "href": "http://other.test/some/actor",
      "type": "Mention"
    }
  ],
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Note"
}

Example 7: null to

Comments

Validation of activity against schema failed

None is not of type 'array'

Failed validating 'type' in schema['properties']['to']:
    {'description': 'Array of actors this activity or object is addressed '
                    'to',
     'examples': [['https://bob.example'],
                  ['https://alice.example', 'https://bob.example']],
     'items': {'type': 'string'},
     'minItems': 1,
     'type': 'array'}

On instance['to']:
    None

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": "http://host.test/some/actor",
  "cc": [],
  "id": "http://host.test/activities/aieurbAme3fsC9sE",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "text",
    "id": "http://host.test/objects/Pi4qGnqgQYk4uEQR",
    "published": "2026-04-08T07:53:32Z",
    "tag": [
      {
        "href": "http://other.test/some/actor",
        "type": "Mention"
      }
    ],
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Note"
  },
  "published": "2026-04-08T07:53:32Z",
  "to": null,
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "text",
  "id": "http://host.test/objects/Pi4qGnqgQYk4uEQR",
  "published": "2026-04-08T07:53:32Z",
  "tag": [
    {
      "href": "http://other.test/some/actor",
      "type": "Mention"
    }
  ],
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Note"
}

Example 8: null cc

Comments

Validation of activity against schema failed

None is not of type 'array'

Failed validating 'type' in schema['properties']['cc']:
    {'default': [],
     'description': 'Array of actors this activity or object is carbon '
                    'copied to.',
     'examples': [['https://bob.example'],
                  ['https://alice.example', 'https://bob.example']],
     'items': {'type': 'string'},
     'type': 'array'}

On instance['cc']:
    None

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": "http://host.test/some/actor",
  "cc": null,
  "id": "http://host.test/activities/gg3vnMSqr-rRXqcx",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "text",
    "id": "http://host.test/objects/BLe8D7DRQ1fwFktS",
    "published": "2026-04-08T07:53:32Z",
    "tag": [
      {
        "href": "http://other.test/some/actor",
        "type": "Mention"
      }
    ],
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Note"
  },
  "published": "2026-04-08T07:53:32Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "text",
  "id": "http://host.test/objects/BLe8D7DRQ1fwFktS",
  "published": "2026-04-08T07:53:32Z",
  "tag": [
    {
      "href": "http://other.test/some/actor",
      "type": "Mention"
    }
  ],
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Note"
}

Example 9: null type

Comments

Validation of activity against schema failed

None is not of type 'string'

Failed validating 'type' in schema['properties']['type']:
    {'description': 'Type of the activity or activity',
     'examples': ['Follow', 'Accept', 'Create', 'Undo', 'Like', 'Note'],
     'type': 'string'}

On instance['type']:
    None

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": "http://host.test/some/actor",
  "cc": [],
  "id": "http://host.test/activities/zycknMOstdcIPQi9",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "text",
    "id": "http://host.test/objects/1ImFjv205CGCOfLG",
    "published": "2026-04-08T07:53:32Z",
    "tag": [
      {
        "href": "http://other.test/some/actor",
        "type": "Mention"
      }
    ],
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Note"
  },
  "published": "2026-04-08T07:53:32Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": null
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "text",
  "id": "http://host.test/objects/1ImFjv205CGCOfLG",
  "published": "2026-04-08T07:53:32Z",
  "tag": [
    {
      "href": "http://other.test/some/actor",
      "type": "Mention"
    }
  ],
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Note"
}

Example 10: without @context

Comments

Validation of activity against schema failed

'@context' is a required property

Failed validating 'required' in schema:
    {'additionalProperties': True,
     'description': 'Draft of a schema for ActivityPub activities',
     'properties': {'@context': {'anyOf': [{'type': 'string'},
                                           {'items': {}, 'type': 'array'}],
                                 'examples': ['https://www.w3.org/ns/activitystreams',
                                              ['https://www.w3.org/ns/activitystreams',
                                               {'Hashtag': 'as:Hashtag'}]]},
                    'id': {'description': 'id of the activity or object',
                           'examples': ['https://actor.example/some_id'],
                           'type': 'string'},
                    'to': {'description': 'Array of actors this activity '
                                          'or object is addressed to',
                           'examples': [['https://bob.example'],
                                        ['https://alice.example',
                                         'https://bob.example']],
                           'items': {'type': 'string'},
                           'minItems': 1,
                           'type': 'array'},
                    'cc': {'default': [],
                           'description': 'Array of actors this activity '
                                          'or object is carbon copied to.',
                           'examples': [['https://bob.example'],
                                        ['https://alice.example',
                                         'https://bob.example']],
                           'items': {'type': 'string'},
                           'type': 'array'},
                    'published': {'description': 'Moment of this activity '
                                                 'or object being '
                                                 'published',
                                  'format': 'date-time',
                                  'type': 'string'},
                    'type': {'description': 'Type of the activity or '
                                            'activity',
                             'examples': ['Follow',
                                          'Accept',
                                          'Create',
                                          'Undo',
                                          'Like',
                                          'Note'],
                             'type': 'string'},
                    'actor': {'description': 'id of the actor performing '
                                             'this activity',
                              'examples': ['https://actor.example/'],
                              'type': 'string'},
                    'object': {'anyOf': [{'type': 'string'},
                                         {'type': 'object'}]},
                    'target': {'anyOf': [{'type': 'string'},
                                         {'additionalProperties': True,
                                          'type': 'object'}],
                               'description': 'The target, e.g. for an Add '
                                              'activity',
                               'examples': ['https://other.example/target_id',
                                            {'content': 'meow',
                                             'type': 'Note'}]},
                    'content': {'description': 'The content used for '
                                               'example to represent the '
                                               'Emote for a like',
                                'examples': ['🐮', '❤️'],
                                'type': 'string'}},
     'required': ['@context', 'id', 'to', 'type', 'actor', 'cc'],
     'title': 'Activity',
     'type': 'object'}

On instance:
    {'actor': 'http://host.test/some/actor',
     'id': 'http://host.test/activities/bqY9qQUkRRHKvAmE',
     'object': {'@context': ['https://www.w3.org/ns/activitystreams'],
                'id': 'http://host.test/objects/_Ag7CocE3nlIrfa9',
                'type': 'Note',
                'attributedTo': 'http://host.test/some/actor',
                'to': ['https://www.w3.org/ns/activitystreams#Public',
                       'http://other.test/some/actor'],
                'cc': [],
                'published': '2026-04-08T07:53:32Z',
                'content': 'text',
                'tag': [{'type': 'Mention',
                         'href': 'http://other.test/some/actor'}]},
     'published': '2026-04-08T07:53:32Z',
     'to': ['https://www.w3.org/ns/activitystreams#Public',
            'http://other.test/some/actor'],
     'cc': [],
     'type': 'Create'}

Activity

{
  "actor": "http://host.test/some/actor",
  "cc": [],
  "id": "http://host.test/activities/gtLWEjvFA1NWvPxd",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "text",
    "id": "http://host.test/objects/EN2rFmJhp6apMP4D",
    "published": "2026-04-08T07:53:32Z",
    "tag": [
      {
        "href": "http://other.test/some/actor",
        "type": "Mention"
      }
    ],
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Note"
  },
  "published": "2026-04-08T07:53:32Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "text",
  "id": "http://host.test/objects/EN2rFmJhp6apMP4D",
  "published": "2026-04-08T07:53:32Z",
  "tag": [
    {
      "href": "http://other.test/some/actor",
      "type": "Mention"
    }
  ],
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Note"
}

Example 11: without actor

Comments

Validation of activity against schema failed

'actor' is a required property

Failed validating 'required' in schema:
    {'additionalProperties': True,
     'description': 'Draft of a schema for ActivityPub activities',
     'properties': {'@context': {'anyOf': [{'type': 'string'},
                                           {'items': {}, 'type': 'array'}],
                                 'examples': ['https://www.w3.org/ns/activitystreams',
                                              ['https://www.w3.org/ns/activitystreams',
                                               {'Hashtag': 'as:Hashtag'}]]},
                    'id': {'description': 'id of the activity or object',
                           'examples': ['https://actor.example/some_id'],
                           'type': 'string'},
                    'to': {'description': 'Array of actors this activity '
                                          'or object is addressed to',
                           'examples': [['https://bob.example'],
                                        ['https://alice.example',
                                         'https://bob.example']],
                           'items': {'type': 'string'},
                           'minItems': 1,
                           'type': 'array'},
                    'cc': {'default': [],
                           'description': 'Array of actors this activity '
                                          'or object is carbon copied to.',
                           'examples': [['https://bob.example'],
                                        ['https://alice.example',
                                         'https://bob.example']],
                           'items': {'type': 'string'},
                           'type': 'array'},
                    'published': {'description': 'Moment of this activity '
                                                 'or object being '
                                                 'published',
                                  'format': 'date-time',
                                  'type': 'string'},
                    'type': {'description': 'Type of the activity or '
                                            'activity',
                             'examples': ['Follow',
                                          'Accept',
                                          'Create',
                                          'Undo',
                                          'Like',
                                          'Note'],
                             'type': 'string'},
                    'actor': {'description': 'id of the actor performing '
                                             'this activity',
                              'examples': ['https://actor.example/'],
                              'type': 'string'},
                    'object': {'anyOf': [{'type': 'string'},
                                         {'type': 'object'}]},
                    'target': {'anyOf': [{'type': 'string'},
                                         {'additionalProperties': True,
                                          'type': 'object'}],
                               'description': 'The target, e.g. for an Add '
                                              'activity',
                               'examples': ['https://other.example/target_id',
                                            {'content': 'meow',
                                             'type': 'Note'}]},
                    'content': {'description': 'The content used for '
                                               'example to represent the '
                                               'Emote for a like',
                                'examples': ['🐮', '❤️'],
                                'type': 'string'}},
     'required': ['@context', 'id', 'to', 'type', 'actor', 'cc'],
     'title': 'Activity',
     'type': 'object'}

On instance:
    {'@context': ['https://www.w3.org/ns/activitystreams'],
     'id': 'http://host.test/activities/u_bpbcplVroGJwWX',
     'object': {'@context': ['https://www.w3.org/ns/activitystreams'],
                'id': 'http://host.test/objects/VQ9Lfgtw66im7TeV',
                'type': 'Note',
                'attributedTo': 'http://host.test/some/actor',
                'to': ['https://www.w3.org/ns/activitystreams#Public',
                       'http://other.test/some/actor'],
                'cc': [],
                'published': '2026-04-08T07:53:32Z',
                'content': 'text',
                'tag': [{'type': 'Mention',
                         'href': 'http://other.test/some/actor'}]},
     'published': '2026-04-08T07:53:32Z',
     'to': ['https://www.w3.org/ns/activitystreams#Public',
            'http://other.test/some/actor'],
     'cc': [],
     'type': 'Create'}

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "cc": [],
  "id": "http://host.test/activities/tvtJmugmVg4JM5nI",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "text",
    "id": "http://host.test/objects/jCqA4gALT4jBZ0Xb",
    "published": "2026-04-08T07:53:32Z",
    "tag": [
      {
        "href": "http://other.test/some/actor",
        "type": "Mention"
      }
    ],
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Note"
  },
  "published": "2026-04-08T07:53:32Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "text",
  "id": "http://host.test/objects/jCqA4gALT4jBZ0Xb",
  "published": "2026-04-08T07:53:32Z",
  "tag": [
    {
      "href": "http://other.test/some/actor",
      "type": "Mention"
    }
  ],
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Note"
}

Example 12: without id

Comments

Validation of activity against schema failed

'id' is a required property

Failed validating 'required' in schema:
    {'additionalProperties': True,
     'description': 'Draft of a schema for ActivityPub activities',
     'properties': {'@context': {'anyOf': [{'type': 'string'},
                                           {'items': {}, 'type': 'array'}],
                                 'examples': ['https://www.w3.org/ns/activitystreams',
                                              ['https://www.w3.org/ns/activitystreams',
                                               {'Hashtag': 'as:Hashtag'}]]},
                    'id': {'description': 'id of the activity or object',
                           'examples': ['https://actor.example/some_id'],
                           'type': 'string'},
                    'to': {'description': 'Array of actors this activity '
                                          'or object is addressed to',
                           'examples': [['https://bob.example'],
                                        ['https://alice.example',
                                         'https://bob.example']],
                           'items': {'type': 'string'},
                           'minItems': 1,
                           'type': 'array'},
                    'cc': {'default': [],
                           'description': 'Array of actors this activity '
                                          'or object is carbon copied to.',
                           'examples': [['https://bob.example'],
                                        ['https://alice.example',
                                         'https://bob.example']],
                           'items': {'type': 'string'},
                           'type': 'array'},
                    'published': {'description': 'Moment of this activity '
                                                 'or object being '
                                                 'published',
                                  'format': 'date-time',
                                  'type': 'string'},
                    'type': {'description': 'Type of the activity or '
                                            'activity',
                             'examples': ['Follow',
                                          'Accept',
                                          'Create',
                                          'Undo',
                                          'Like',
                                          'Note'],
                             'type': 'string'},
                    'actor': {'description': 'id of the actor performing '
                                             'this activity',
                              'examples': ['https://actor.example/'],
                              'type': 'string'},
                    'object': {'anyOf': [{'type': 'string'},
                                         {'type': 'object'}]},
                    'target': {'anyOf': [{'type': 'string'},
                                         {'additionalProperties': True,
                                          'type': 'object'}],
                               'description': 'The target, e.g. for an Add '
                                              'activity',
                               'examples': ['https://other.example/target_id',
                                            {'content': 'meow',
                                             'type': 'Note'}]},
                    'content': {'description': 'The content used for '
                                               'example to represent the '
                                               'Emote for a like',
                                'examples': ['🐮', '❤️'],
                                'type': 'string'}},
     'required': ['@context', 'id', 'to', 'type', 'actor', 'cc'],
     'title': 'Activity',
     'type': 'object'}

On instance:
    {'@context': ['https://www.w3.org/ns/activitystreams'],
     'actor': 'http://host.test/some/actor',
     'object': {'@context': ['https://www.w3.org/ns/activitystreams'],
                'id': 'http://host.test/objects/mXW7twaYdK8O37Lh',
                'type': 'Note',
                'attributedTo': 'http://host.test/some/actor',
                'to': ['https://www.w3.org/ns/activitystreams#Public',
                       'http://other.test/some/actor'],
                'cc': [],
                'published': '2026-04-08T07:53:32Z',
                'content': 'text',
                'tag': [{'type': 'Mention',
                         'href': 'http://other.test/some/actor'}]},
     'published': '2026-04-08T07:53:32Z',
     'to': ['https://www.w3.org/ns/activitystreams#Public',
            'http://other.test/some/actor'],
     'cc': [],
     'type': 'Create'}

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": "http://host.test/some/actor",
  "cc": [],
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "text",
    "id": "http://host.test/objects/H1z5TGM3k9OlGvq8",
    "published": "2026-04-08T07:53:32Z",
    "tag": [
      {
        "href": "http://other.test/some/actor",
        "type": "Mention"
      }
    ],
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Note"
  },
  "published": "2026-04-08T07:53:32Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "text",
  "id": "http://host.test/objects/H1z5TGM3k9OlGvq8",
  "published": "2026-04-08T07:53:32Z",
  "tag": [
    {
      "href": "http://other.test/some/actor",
      "type": "Mention"
    }
  ],
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Note"
}

Example 13: without to

Comments

Validation of activity against schema failed

'to' is a required property

Failed validating 'required' in schema:
    {'additionalProperties': True,
     'description': 'Draft of a schema for ActivityPub activities',
     'properties': {'@context': {'anyOf': [{'type': 'string'},
                                           {'items': {}, 'type': 'array'}],
                                 'examples': ['https://www.w3.org/ns/activitystreams',
                                              ['https://www.w3.org/ns/activitystreams',
                                               {'Hashtag': 'as:Hashtag'}]]},
                    'id': {'description': 'id of the activity or object',
                           'examples': ['https://actor.example/some_id'],
                           'type': 'string'},
                    'to': {'description': 'Array of actors this activity '
                                          'or object is addressed to',
                           'examples': [['https://bob.example'],
                                        ['https://alice.example',
                                         'https://bob.example']],
                           'items': {'type': 'string'},
                           'minItems': 1,
                           'type': 'array'},
                    'cc': {'default': [],
                           'description': 'Array of actors this activity '
                                          'or object is carbon copied to.',
                           'examples': [['https://bob.example'],
                                        ['https://alice.example',
                                         'https://bob.example']],
                           'items': {'type': 'string'},
                           'type': 'array'},
                    'published': {'description': 'Moment of this activity '
                                                 'or object being '
                                                 'published',
                                  'format': 'date-time',
                                  'type': 'string'},
                    'type': {'description': 'Type of the activity or '
                                            'activity',
                             'examples': ['Follow',
                                          'Accept',
                                          'Create',
                                          'Undo',
                                          'Like',
                                          'Note'],
                             'type': 'string'},
                    'actor': {'description': 'id of the actor performing '
                                             'this activity',
                              'examples': ['https://actor.example/'],
                              'type': 'string'},
                    'object': {'anyOf': [{'type': 'string'},
                                         {'type': 'object'}]},
                    'target': {'anyOf': [{'type': 'string'},
                                         {'additionalProperties': True,
                                          'type': 'object'}],
                               'description': 'The target, e.g. for an Add '
                                              'activity',
                               'examples': ['https://other.example/target_id',
                                            {'content': 'meow',
                                             'type': 'Note'}]},
                    'content': {'description': 'The content used for '
                                               'example to represent the '
                                               'Emote for a like',
                                'examples': ['🐮', '❤️'],
                                'type': 'string'}},
     'required': ['@context', 'id', 'to', 'type', 'actor', 'cc'],
     'title': 'Activity',
     'type': 'object'}

On instance:
    {'@context': ['https://www.w3.org/ns/activitystreams'],
     'actor': 'http://host.test/some/actor',
     'id': 'http://host.test/activities/vz6mJ35LG3HbLA1N',
     'object': {'@context': ['https://www.w3.org/ns/activitystreams'],
                'id': 'http://host.test/objects/8xrSfJfw8dplxM5l',
                'type': 'Note',
                'attributedTo': 'http://host.test/some/actor',
                'to': ['https://www.w3.org/ns/activitystreams#Public',
                       'http://other.test/some/actor'],
                'cc': [],
                'published': '2026-04-08T07:53:32Z',
                'content': 'text',
                'tag': [{'type': 'Mention',
                         'href': 'http://other.test/some/actor'}]},
     'published': '2026-04-08T07:53:32Z',
     'cc': [],
     'type': 'Create'}

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": "http://host.test/some/actor",
  "cc": [],
  "id": "http://host.test/activities/JG6CJ_7fNfGmAhKW",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "text",
    "id": "http://host.test/objects/f50d3KnRBSoskGLK",
    "published": "2026-04-08T07:53:32Z",
    "tag": [
      {
        "href": "http://other.test/some/actor",
        "type": "Mention"
      }
    ],
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Note"
  },
  "published": "2026-04-08T07:53:32Z",
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "text",
  "id": "http://host.test/objects/f50d3KnRBSoskGLK",
  "published": "2026-04-08T07:53:32Z",
  "tag": [
    {
      "href": "http://other.test/some/actor",
      "type": "Mention"
    }
  ],
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Note"
}

Example 14: without cc

Comments

Validation of activity against schema failed

'cc' is a required property

Failed validating 'required' in schema:
    {'additionalProperties': True,
     'description': 'Draft of a schema for ActivityPub activities',
     'properties': {'@context': {'anyOf': [{'type': 'string'},
                                           {'items': {}, 'type': 'array'}],
                                 'examples': ['https://www.w3.org/ns/activitystreams',
                                              ['https://www.w3.org/ns/activitystreams',
                                               {'Hashtag': 'as:Hashtag'}]]},
                    'id': {'description': 'id of the activity or object',
                           'examples': ['https://actor.example/some_id'],
                           'type': 'string'},
                    'to': {'description': 'Array of actors this activity '
                                          'or object is addressed to',
                           'examples': [['https://bob.example'],
                                        ['https://alice.example',
                                         'https://bob.example']],
                           'items': {'type': 'string'},
                           'minItems': 1,
                           'type': 'array'},
                    'cc': {'default': [],
                           'description': 'Array of actors this activity '
                                          'or object is carbon copied to.',
                           'examples': [['https://bob.example'],
                                        ['https://alice.example',
                                         'https://bob.example']],
                           'items': {'type': 'string'},
                           'type': 'array'},
                    'published': {'description': 'Moment of this activity '
                                                 'or object being '
                                                 'published',
                                  'format': 'date-time',
                                  'type': 'string'},
                    'type': {'description': 'Type of the activity or '
                                            'activity',
                             'examples': ['Follow',
                                          'Accept',
                                          'Create',
                                          'Undo',
                                          'Like',
                                          'Note'],
                             'type': 'string'},
                    'actor': {'description': 'id of the actor performing '
                                             'this activity',
                              'examples': ['https://actor.example/'],
                              'type': 'string'},
                    'object': {'anyOf': [{'type': 'string'},
                                         {'type': 'object'}]},
                    'target': {'anyOf': [{'type': 'string'},
                                         {'additionalProperties': True,
                                          'type': 'object'}],
                               'description': 'The target, e.g. for an Add '
                                              'activity',
                               'examples': ['https://other.example/target_id',
                                            {'content': 'meow',
                                             'type': 'Note'}]},
                    'content': {'description': 'The content used for '
                                               'example to represent the '
                                               'Emote for a like',
                                'examples': ['🐮', '❤️'],
                                'type': 'string'}},
     'required': ['@context', 'id', 'to', 'type', 'actor', 'cc'],
     'title': 'Activity',
     'type': 'object'}

On instance:
    {'@context': ['https://www.w3.org/ns/activitystreams'],
     'actor': 'http://host.test/some/actor',
     'id': 'http://host.test/activities/ZSH6KBWDZpezWfQA',
     'object': {'@context': ['https://www.w3.org/ns/activitystreams'],
                'id': 'http://host.test/objects/XsXmVfRvGKRoXtHx',
                'type': 'Note',
                'attributedTo': 'http://host.test/some/actor',
                'to': ['https://www.w3.org/ns/activitystreams#Public',
                       'http://other.test/some/actor'],
                'cc': [],
                'published': '2026-04-08T07:53:32Z',
                'content': 'text',
                'tag': [{'type': 'Mention',
                         'href': 'http://other.test/some/actor'}]},
     'published': '2026-04-08T07:53:32Z',
     'to': ['https://www.w3.org/ns/activitystreams#Public',
            'http://other.test/some/actor'],
     'type': 'Create'}

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": "http://host.test/some/actor",
  "id": "http://host.test/activities/h_eoZyySycC0mBx7",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "text",
    "id": "http://host.test/objects/QmNOy6nRBwY2Mh-L",
    "published": "2026-04-08T07:53:32Z",
    "tag": [
      {
        "href": "http://other.test/some/actor",
        "type": "Mention"
      }
    ],
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Note"
  },
  "published": "2026-04-08T07:53:32Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "text",
  "id": "http://host.test/objects/QmNOy6nRBwY2Mh-L",
  "published": "2026-04-08T07:53:32Z",
  "tag": [
    {
      "href": "http://other.test/some/actor",
      "type": "Mention"
    }
  ],
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Note"
}

Example 15: without type

Comments

Validation of activity against schema failed

'type' is a required property

Failed validating 'required' in schema:
    {'additionalProperties': True,
     'description': 'Draft of a schema for ActivityPub activities',
     'properties': {'@context': {'anyOf': [{'type': 'string'},
                                           {'items': {}, 'type': 'array'}],
                                 'examples': ['https://www.w3.org/ns/activitystreams',
                                              ['https://www.w3.org/ns/activitystreams',
                                               {'Hashtag': 'as:Hashtag'}]]},
                    'id': {'description': 'id of the activity or object',
                           'examples': ['https://actor.example/some_id'],
                           'type': 'string'},
                    'to': {'description': 'Array of actors this activity '
                                          'or object is addressed to',
                           'examples': [['https://bob.example'],
                                        ['https://alice.example',
                                         'https://bob.example']],
                           'items': {'type': 'string'},
                           'minItems': 1,
                           'type': 'array'},
                    'cc': {'default': [],
                           'description': 'Array of actors this activity '
                                          'or object is carbon copied to.',
                           'examples': [['https://bob.example'],
                                        ['https://alice.example',
                                         'https://bob.example']],
                           'items': {'type': 'string'},
                           'type': 'array'},
                    'published': {'description': 'Moment of this activity '
                                                 'or object being '
                                                 'published',
                                  'format': 'date-time',
                                  'type': 'string'},
                    'type': {'description': 'Type of the activity or '
                                            'activity',
                             'examples': ['Follow',
                                          'Accept',
                                          'Create',
                                          'Undo',
                                          'Like',
                                          'Note'],
                             'type': 'string'},
                    'actor': {'description': 'id of the actor performing '
                                             'this activity',
                              'examples': ['https://actor.example/'],
                              'type': 'string'},
                    'object': {'anyOf': [{'type': 'string'},
                                         {'type': 'object'}]},
                    'target': {'anyOf': [{'type': 'string'},
                                         {'additionalProperties': True,
                                          'type': 'object'}],
                               'description': 'The target, e.g. for an Add '
                                              'activity',
                               'examples': ['https://other.example/target_id',
                                            {'content': 'meow',
                                             'type': 'Note'}]},
                    'content': {'description': 'The content used for '
                                               'example to represent the '
                                               'Emote for a like',
                                'examples': ['🐮', '❤️'],
                                'type': 'string'}},
     'required': ['@context', 'id', 'to', 'type', 'actor', 'cc'],
     'title': 'Activity',
     'type': 'object'}

On instance:
    {'@context': ['https://www.w3.org/ns/activitystreams'],
     'actor': 'http://host.test/some/actor',
     'id': 'http://host.test/activities/PFIGSXYI8WDKwdGl',
     'object': {'@context': ['https://www.w3.org/ns/activitystreams'],
                'id': 'http://host.test/objects/lj1SyR3VUo2B_Nac',
                'type': 'Note',
                'attributedTo': 'http://host.test/some/actor',
                'to': ['https://www.w3.org/ns/activitystreams#Public',
                       'http://other.test/some/actor'],
                'cc': [],
                'published': '2026-04-08T07:53:32Z',
                'content': 'text',
                'tag': [{'type': 'Mention',
                         'href': 'http://other.test/some/actor'}]},
     'published': '2026-04-08T07:53:32Z',
     'to': ['https://www.w3.org/ns/activitystreams#Public',
            'http://other.test/some/actor'],
     'cc': []}

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": "http://host.test/some/actor",
  "cc": [],
  "id": "http://host.test/activities/TlCTuElgxUi4_AVy",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "text",
    "id": "http://host.test/objects/iGRnwv1-YkWz6J4s",
    "published": "2026-04-08T07:53:32Z",
    "tag": [
      {
        "href": "http://other.test/some/actor",
        "type": "Mention"
      }
    ],
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Note"
  },
  "published": "2026-04-08T07:53:32Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ]
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "text",
  "id": "http://host.test/objects/iGRnwv1-YkWz6J4s",
  "published": "2026-04-08T07:53:32Z",
  "tag": [
    {
      "href": "http://other.test/some/actor",
      "type": "Mention"
    }
  ],
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Note"
}

Example 16: as list actor

Comments

Validation of activity against schema failed

['http://host.test/some/actor'] is not of type 'string'

Failed validating 'type' in schema['properties']['actor']:
    {'description': 'id of the actor performing this activity',
     'examples': ['https://actor.example/'],
     'type': 'string'}

On instance['actor']:
    ['http://host.test/some/actor']

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": [
    "http://host.test/some/actor"
  ],
  "cc": [],
  "id": "http://host.test/activities/B6yqp5cBkOwWKzYZ",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "text",
    "id": "http://host.test/objects/6ytyneIZzbpkJJm8",
    "published": "2026-04-08T07:53:32Z",
    "tag": [
      {
        "href": "http://other.test/some/actor",
        "type": "Mention"
      }
    ],
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Note"
  },
  "published": "2026-04-08T07:53:32Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "text",
  "id": "http://host.test/objects/6ytyneIZzbpkJJm8",
  "published": "2026-04-08T07:53:32Z",
  "tag": [
    {
      "href": "http://other.test/some/actor",
      "type": "Mention"
    }
  ],
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Note"
}

Example 17: as list published

Comments

Validation of activity against schema failed

['2026-04-08T07:53:32Z'] is not of type 'string'

Failed validating 'type' in schema['properties']['published']:
    {'description': 'Moment of this activity or object being published',
     'format': 'date-time',
     'type': 'string'}

On instance['published']:
    ['2026-04-08T07:53:32Z']

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": "http://host.test/some/actor",
  "cc": [],
  "id": "http://host.test/activities/JjrucJuY8xjmCHti",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "text",
    "id": "http://host.test/objects/ZZRl7G2Vd_Z2UhCZ",
    "published": "2026-04-08T07:53:32Z",
    "tag": [
      {
        "href": "http://other.test/some/actor",
        "type": "Mention"
      }
    ],
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Note"
  },
  "published": [
    "2026-04-08T07:53:32Z"
  ],
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "text",
  "id": "http://host.test/objects/ZZRl7G2Vd_Z2UhCZ",
  "published": "2026-04-08T07:53:32Z",
  "tag": [
    {
      "href": "http://other.test/some/actor",
      "type": "Mention"
    }
  ],
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Note"
}

Example 18: as list object

Comments

Validation of activity against schema failed

[{'@context': ['https://www.w3.org/ns/activitystreams'], 'id': 'http://host.test/objects/_WmMKHCnrfyqPXZX', 'type': 'Note', 'attributedTo': 'http://host.test/some/actor', 'to': ['https://www.w3.org/ns/activitystreams#Public', 'http://other.test/some/actor'], 'cc': [], 'published': '2026-04-08T07:53:32Z', 'content': 'text', 'tag': [{'type': 'Mention', 'href': 'http://other.test/some/actor'}]}] is not valid under any of the given schemas

Failed validating 'anyOf' in schema['properties']['object']:
    {'anyOf': [{'type': 'string'}, {'type': 'object'}]}

On instance['object']:
    [{'@context': ['https://www.w3.org/ns/activitystreams'],
      'id': 'http://host.test/objects/_WmMKHCnrfyqPXZX',
      'type': 'Note',
      'attributedTo': 'http://host.test/some/actor',
      'to': ['https://www.w3.org/ns/activitystreams#Public',
             'http://other.test/some/actor'],
      'cc': [],
      'published': '2026-04-08T07:53:32Z',
      'content': 'text',
      'tag': [{'type': 'Mention', 'href': 'http://other.test/some/actor'}]}]

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": "http://host.test/some/actor",
  "cc": [],
  "id": "http://host.test/activities/XiLIpc54z1be4o1N",
  "object": [
    {
      "@context": [
        "https://www.w3.org/ns/activitystreams"
      ],
      "attributedTo": "http://host.test/some/actor",
      "cc": [],
      "content": "text",
      "id": "http://host.test/objects/Lwg4QBp3Wtkm-7R6",
      "published": "2026-04-08T07:53:32Z",
      "tag": [
        {
          "href": "http://other.test/some/actor",
          "type": "Mention"
        }
      ],
      "to": [
        "https://www.w3.org/ns/activitystreams#Public",
        "http://other.test/some/actor"
      ],
      "type": "Note"
    }
  ],
  "published": "2026-04-08T07:53:32Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "text",
  "id": "http://host.test/objects/Lwg4QBp3Wtkm-7R6",
  "published": "2026-04-08T07:53:32Z",
  "tag": [
    {
      "href": "http://other.test/some/actor",
      "type": "Mention"
    }
  ],
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Note"
}

Example 19: as list type

Comments

Validation of activity against schema failed

['Create'] is not of type 'string'

Failed validating 'type' in schema['properties']['type']:
    {'description': 'Type of the activity or activity',
     'examples': ['Follow', 'Accept', 'Create', 'Undo', 'Like', 'Note'],
     'type': 'string'}

On instance['type']:
    ['Create']

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": "http://host.test/some/actor",
  "cc": [],
  "id": "http://host.test/activities/s6ce8hweIAasxgJn",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "text",
    "id": "http://host.test/objects/e0-Yd1unZqsp5RU8",
    "published": "2026-04-08T07:53:32Z",
    "tag": [
      {
        "href": "http://other.test/some/actor",
        "type": "Mention"
      }
    ],
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Note"
  },
  "published": "2026-04-08T07:53:32Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": [
    "Create"
  ]
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "text",
  "id": "http://host.test/objects/e0-Yd1unZqsp5RU8",
  "published": "2026-04-08T07:53:32Z",
  "tag": [
    {
      "href": "http://other.test/some/actor",
      "type": "Mention"
    }
  ],
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Note"
}

Example 20: embedded_actor

Comments

Validation of activity against schema failed

{'type': 'Person', 'id': 'http://host.test/some/actor', 'summary': 'this is a stub'} is not of type 'string'

Failed validating 'type' in schema['properties']['actor']:
    {'description': 'id of the actor performing this activity',
     'examples': ['https://actor.example/'],
     'type': 'string'}

On instance['actor']:
    {'type': 'Person',
     'id': 'http://host.test/some/actor',
     'summary': 'this is a stub'}

Activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "actor": {
    "id": "http://host.test/some/actor",
    "summary": "this is a stub",
    "type": "Person"
  },
  "cc": [],
  "id": "http://host.test/activities/d-HP7L4HfaYFM_Kt",
  "object": {
    "@context": [
      "https://www.w3.org/ns/activitystreams"
    ],
    "attributedTo": "http://host.test/some/actor",
    "cc": [],
    "content": "text",
    "id": "http://host.test/objects/HBGYHFd_TN_Y6tfu",
    "published": "2026-04-08T07:53:32Z",
    "tag": [
      {
        "href": "http://other.test/some/actor",
        "type": "Mention"
      }
    ],
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://other.test/some/actor"
    ],
    "type": "Note"
  },
  "published": "2026-04-08T07:53:32Z",
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Create"
}

Object

{
  "@context": [
    "https://www.w3.org/ns/activitystreams"
  ],
  "attributedTo": "http://host.test/some/actor",
  "cc": [],
  "content": "text",
  "id": "http://host.test/objects/HBGYHFd_TN_Y6tfu",
  "published": "2026-04-08T07:53:32Z",
  "tag": [
    {
      "href": "http://other.test/some/actor",
      "type": "Mention"
    }
  ],
  "to": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://other.test/some/actor"
  ],
  "type": "Note"
}