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Mentions

Mentions are discussed in this section of ActivityStreams.

The big difference on if mentions are parsed are currently a result of if the value in href can be resolved by the application being tested.

In the support table parsed means that the activity could be parsed, but the mention was discarded. A ❌ in the support table means that the entire message has failed to parse.

Examples

Example 1

activity
{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/G1YdzXYZEu4",
  "published": "2025-07-31T11:06:39Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/uhEEesE6a5c",
    "published": "2025-07-31T11:06:39Z",
    "content": "basic mention; mention as list of dictionaries",
    "tag": [
      {
        "type": "Mention",
        "name": "@actor@test_server",
        "href": "http://pasture-one-actor/actor"
      }
    ],
    "cc": []
  }
}

Example 2

activity
{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/j6XyrECwXYc",
  "published": "2025-07-31T11:06:53Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/cVSmlQOHKkM",
    "published": "2025-07-31T11:06:53Z",
    "content": "text @actor@pasture-one-actor; mention as dictionary",
    "tag": {
      "type": "Mention",
      "name": "@actor@test_server",
      "href": "http://pasture-one-actor/actor"
    },
    "cc": []
  }
}

Example 3

activity
{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/g1zauGgmkos",
  "published": "2025-07-31T11:07:07Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/ukRz90cZVSY",
    "published": "2025-07-31T11:07:07Z",
    "content": "unrelated text",
    "tag": {
      "type": "Mention",
      "name": "something something",
      "href": "http://pasture-one-actor/actor"
    },
    "cc": []
  }
}

Example 4

activity
{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/Fo3ZSc0FdXo",
  "published": "2025-07-31T11:07:20Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/e_gyIeYVGPg",
    "published": "2025-07-31T11:07:20Z",
    "content": "Missing Name @actor@pasture-one-actor",
    "tag": {
      "type": "Mention",
      "href": "http://pasture-one-actor/actor"
    },
    "cc": []
  }
}

Example 5

activity
{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/jYVZ6dXT8TQ",
  "published": "2025-07-31T11:07:34Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/Ksoh1tzj8_M",
    "published": "2025-07-31T11:07:34Z",
    "content": "text",
    "tag": {
      "type": "Mention",
      "name": "@the_milkman@mastodon.social",
      "href": "https://mastodon.social/users/the_milkman"
    },
    "cc": []
  }
}

Example 6

activity
{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/d9q2roRGOak",
  "published": "2025-07-31T11:07:47Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/PjC1MCJfP_0",
    "published": "2025-07-31T11:07:47Z",
    "content": "text",
    "tag": {
      "type": "Mention",
      "name": "@dummy@example",
      "href": "https://dummy.example"
    },
    "cc": []
  }
}

Example 7

activity
{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/6KbvkU42PFs",
  "published": "2025-07-31T11:08:01Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/4LaXIqy7A94",
    "published": "2025-07-31T11:08:01Z",
    "content": "text",
    "tag": {
      "type": "Mention",
      "name": "@test_actor@test_server",
      "href": "http://test_actor"
    },
    "cc": []
  }
}

Example 8

activity
{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/Tds60GxvCmg",
  "published": "2025-07-31T11:08:14Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/1N8uLWDLtPo",
    "published": "2025-07-31T11:08:14Z",
    "content": "text",
    "tag": {
      "type": "as:Mention",
      "name": "yay",
      "href": "http://pasture-one-actor/actor"
    },
    "cc": []
  }
}

Example 9

activity
{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/4NoqlyfHSCU",
  "published": "2025-07-31T11:08:28Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/DRdqWZDOfvs",
    "published": "2025-07-31T11:08:28Z",
    "content": "@actor text",
    "tag": {
      "name": "@actor",
      "href": "http://pasture-one-actor/actor"
    },
    "cc": []
  }
}

Example 10

activity
{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://mbin/u/oscar",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/actor/uYpknJ9MxY0",
  "published": "2025-07-31T11:08:42Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://mbin/u/oscar"
    ],
    "id": "http://pasture-one-actor/actor/7NHBKGrELQs",
    "published": "2025-07-31T11:08:42Z",
    "content": "duplicate mention, see https://codeberg.org/funfedidev/fediverse-pasture-inputs/issues/75",
    "tag": [
      {
        "type": "Mention",
        "name": "@actor@test_server",
        "href": "http://pasture-one-actor/actor"
      },
      {
        "type": "Mention",
        "name": "@actor@test_server",
        "href": "http://pasture-one-actor/actor"
      }
    ],
    "cc": []
  }
}