Skip to content

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": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a9zm65u3q2990003"
  ],
  "id": "http://pasture-one-actor/actor/UUapv2fcyjQ",
  "published": "2025-07-09T14:26:52Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a9zm65u3q2990003"
    ],
    "id": "http://pasture-one-actor/actor/C_YNY7Xeh7w",
    "published": "2025-07-09T14:26:52Z",
    "content": "basic mention; mention as list of dictionaries",
    "tag": [
      {
        "type": "Mention",
        "name": "@actor@test_server",
        "href": "http://pasture-one-actor/actor"
      }
    ]
  }
}
misskey
{
  "id": "a9zm9wpsgluj0028",
  "createdAt": "2025-07-09T14:26:52.000Z",
  "userId": "a9zm7rzwgluj0003",
  "user": {
    "id": "a9zm7rzwgluj0003",
    "name": "Test Actor",
    "username": "actor",
    "host": "pasture-one-actor",
    "avatarUrl": "http://misskey/identicon/actor@pasture-one-actor",
    "avatarBlurhash": null,
    "avatarDecorations": [],
    "isBot": false,
    "isCat": false,
    "instance": {
      "name": null,
      "softwareName": null,
      "softwareVersion": null,
      "iconUrl": null,
      "faviconUrl": null,
      "themeColor": null
    },
    "emojis": {},
    "onlineStatus": "unknown"
  },
  "text": "basic mention; mention as list of dictionaries",
  "cw": null,
  "visibility": "public",
  "localOnly": false,
  "reactionAcceptance": null,
  "renoteCount": 0,
  "repliesCount": 0,
  "reactionCount": 0,
  "reactions": {},
  "reactionEmojis": {},
  "emojis": {},
  "fileIds": [],
  "files": [],
  "replyId": null,
  "renoteId": null,
  "mentions": [
    "a9zm7rzwgluj0003"
  ],
  "uri": "http://pasture-one-actor/actor/C_YNY7Xeh7w",
  "clippedCount": 0
}

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": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a9zm65u3q2990003"
  ],
  "id": "http://pasture-one-actor/actor/Tu_ynSypWHY",
  "published": "2025-07-09T14:26:53Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a9zm65u3q2990003"
    ],
    "id": "http://pasture-one-actor/actor/D6k8rEc4mb8",
    "published": "2025-07-09T14:26:53Z",
    "content": "text @actor@pasture-one-actor; mention as dictionary",
    "tag": {
      "type": "Mention",
      "name": "@actor@test_server",
      "href": "http://pasture-one-actor/actor"
    }
  }
}
misskey
{
  "id": "a9zm9xhkgluj0029",
  "createdAt": "2025-07-09T14:26:53.000Z",
  "userId": "a9zm7rzwgluj0003",
  "user": {
    "id": "a9zm7rzwgluj0003",
    "name": "Test Actor",
    "username": "actor",
    "host": "pasture-one-actor",
    "avatarUrl": "http://misskey/identicon/actor@pasture-one-actor",
    "avatarBlurhash": null,
    "avatarDecorations": [],
    "isBot": false,
    "isCat": false,
    "instance": {
      "name": null,
      "softwareName": null,
      "softwareVersion": null,
      "iconUrl": null,
      "faviconUrl": null,
      "themeColor": null
    },
    "emojis": {},
    "onlineStatus": "unknown"
  },
  "text": "text @actor@pasture-one-actor; mention as dictionary",
  "cw": null,
  "visibility": "public",
  "localOnly": false,
  "reactionAcceptance": null,
  "renoteCount": 0,
  "repliesCount": 0,
  "reactionCount": 0,
  "reactions": {},
  "reactionEmojis": {},
  "emojis": {},
  "fileIds": [],
  "files": [],
  "replyId": null,
  "renoteId": null,
  "mentions": [
    "a9zm7rzwgluj0003"
  ],
  "uri": "http://pasture-one-actor/actor/D6k8rEc4mb8",
  "clippedCount": 0
}

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": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a9zm65u3q2990003"
  ],
  "id": "http://pasture-one-actor/actor/JszwQhG1YnA",
  "published": "2025-07-09T14:26:54Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a9zm65u3q2990003"
    ],
    "id": "http://pasture-one-actor/actor/9oZn4ipNrOw",
    "published": "2025-07-09T14:26:54Z",
    "content": "unrelated text",
    "tag": {
      "type": "Mention",
      "name": "something something",
      "href": "http://pasture-one-actor/actor"
    }
  }
}
misskey
{
  "id": "a9zm9y9cgluj002a",
  "createdAt": "2025-07-09T14:26:54.000Z",
  "userId": "a9zm7rzwgluj0003",
  "user": {
    "id": "a9zm7rzwgluj0003",
    "name": "Test Actor",
    "username": "actor",
    "host": "pasture-one-actor",
    "avatarUrl": "http://misskey/identicon/actor@pasture-one-actor",
    "avatarBlurhash": null,
    "avatarDecorations": [],
    "isBot": false,
    "isCat": false,
    "instance": {
      "name": null,
      "softwareName": null,
      "softwareVersion": null,
      "iconUrl": null,
      "faviconUrl": null,
      "themeColor": null
    },
    "emojis": {},
    "onlineStatus": "unknown"
  },
  "text": "unrelated text",
  "cw": null,
  "visibility": "public",
  "localOnly": false,
  "reactionAcceptance": null,
  "renoteCount": 0,
  "repliesCount": 0,
  "reactionCount": 0,
  "reactions": {},
  "reactionEmojis": {},
  "emojis": {},
  "fileIds": [],
  "files": [],
  "replyId": null,
  "renoteId": null,
  "mentions": [
    "a9zm7rzwgluj0003"
  ],
  "uri": "http://pasture-one-actor/actor/9oZn4ipNrOw",
  "clippedCount": 0
}

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": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a9zm65u3q2990003"
  ],
  "id": "http://pasture-one-actor/actor/rL4ADSjW1L0",
  "published": "2025-07-09T14:26:54Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a9zm65u3q2990003"
    ],
    "id": "http://pasture-one-actor/actor/wBRF8MVCrBk",
    "published": "2025-07-09T14:26:54Z",
    "content": "Missing Name @actor@pasture-one-actor",
    "tag": {
      "type": "Mention",
      "href": "http://pasture-one-actor/actor"
    }
  }
}
misskey
{
  "id": "a9zm9y9cgluj002b",
  "createdAt": "2025-07-09T14:26:54.000Z",
  "userId": "a9zm7rzwgluj0003",
  "user": {
    "id": "a9zm7rzwgluj0003",
    "name": "Test Actor",
    "username": "actor",
    "host": "pasture-one-actor",
    "avatarUrl": "http://misskey/identicon/actor@pasture-one-actor",
    "avatarBlurhash": null,
    "avatarDecorations": [],
    "isBot": false,
    "isCat": false,
    "instance": {
      "name": null,
      "softwareName": null,
      "softwareVersion": null,
      "iconUrl": null,
      "faviconUrl": null,
      "themeColor": null
    },
    "emojis": {},
    "onlineStatus": "unknown"
  },
  "text": "Missing Name @actor@pasture-one-actor",
  "cw": null,
  "visibility": "public",
  "localOnly": false,
  "reactionAcceptance": null,
  "renoteCount": 0,
  "repliesCount": 0,
  "reactionCount": 0,
  "reactions": {},
  "reactionEmojis": {},
  "emojis": {},
  "fileIds": [],
  "files": [],
  "replyId": null,
  "renoteId": null,
  "mentions": [
    "a9zm7rzwgluj0003"
  ],
  "uri": "http://pasture-one-actor/actor/wBRF8MVCrBk",
  "clippedCount": 0
}

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": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a9zm65u3q2990003"
  ],
  "id": "http://pasture-one-actor/actor/Gp1YKXuBxY0",
  "published": "2025-07-09T14:26:55Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a9zm65u3q2990003"
    ],
    "id": "http://pasture-one-actor/actor/Nqff1COoAk4",
    "published": "2025-07-09T14:26:55Z",
    "content": "text",
    "tag": {
      "type": "Mention",
      "name": "@the_milkman@mastodon.social",
      "href": "https://mastodon.social/users/the_milkman"
    }
  }
}
misskey
{
  "id": "a9zm9z14gluj002e",
  "createdAt": "2025-07-09T14:26:55.000Z",
  "userId": "a9zm7rzwgluj0003",
  "user": {
    "id": "a9zm7rzwgluj0003",
    "name": "Test Actor",
    "username": "actor",
    "host": "pasture-one-actor",
    "avatarUrl": "http://misskey/identicon/actor@pasture-one-actor",
    "avatarBlurhash": null,
    "avatarDecorations": [],
    "isBot": false,
    "isCat": false,
    "instance": {
      "name": null,
      "softwareName": null,
      "softwareVersion": null,
      "iconUrl": null,
      "faviconUrl": null,
      "themeColor": null
    },
    "emojis": {},
    "onlineStatus": "unknown"
  },
  "text": "text",
  "cw": null,
  "visibility": "public",
  "localOnly": false,
  "reactionAcceptance": null,
  "renoteCount": 0,
  "repliesCount": 0,
  "reactionCount": 0,
  "reactions": {},
  "reactionEmojis": {},
  "emojis": {},
  "fileIds": [],
  "files": [],
  "replyId": null,
  "renoteId": null,
  "mentions": [
    "a9zma0vhgluj002c"
  ],
  "uri": "http://pasture-one-actor/actor/Nqff1COoAk4",
  "clippedCount": 0
}

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": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a9zm65u3q2990003"
  ],
  "id": "http://pasture-one-actor/actor/SuC1PSZqVf4",
  "published": "2025-07-09T14:26:57Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a9zm65u3q2990003"
    ],
    "id": "http://pasture-one-actor/actor/51z_YtP8yWk",
    "published": "2025-07-09T14:26:57Z",
    "content": "text",
    "tag": {
      "type": "Mention",
      "name": "@dummy@example",
      "href": "https://dummy.example"
    }
  }
}
misskey
{
  "id": "a9zma0kogluj002f",
  "createdAt": "2025-07-09T14:26:57.000Z",
  "userId": "a9zm7rzwgluj0003",
  "user": {
    "id": "a9zm7rzwgluj0003",
    "name": "Test Actor",
    "username": "actor",
    "host": "pasture-one-actor",
    "avatarUrl": "http://misskey/identicon/actor@pasture-one-actor",
    "avatarBlurhash": null,
    "avatarDecorations": [],
    "isBot": false,
    "isCat": false,
    "instance": {
      "name": null,
      "softwareName": null,
      "softwareVersion": null,
      "iconUrl": null,
      "faviconUrl": null,
      "themeColor": null
    },
    "emojis": {},
    "onlineStatus": "unknown"
  },
  "text": "text",
  "cw": null,
  "visibility": "public",
  "localOnly": false,
  "reactionAcceptance": null,
  "renoteCount": 0,
  "repliesCount": 0,
  "reactionCount": 0,
  "reactions": {},
  "reactionEmojis": {},
  "emojis": {},
  "fileIds": [],
  "files": [],
  "replyId": null,
  "renoteId": null,
  "uri": "http://pasture-one-actor/actor/51z_YtP8yWk",
  "clippedCount": 0
}

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": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a9zm65u3q2990003"
  ],
  "id": "http://pasture-one-actor/actor/wM6RamFqMx8",
  "published": "2025-07-09T14:26:58Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a9zm65u3q2990003"
    ],
    "id": "http://pasture-one-actor/actor/w7z3wFK6vKc",
    "published": "2025-07-09T14:26:58Z",
    "content": "text",
    "tag": {
      "type": "Mention",
      "name": "@test_actor@test_server",
      "href": "http://test_actor"
    }
  }
}
misskey
{
  "id": "a9zma1cggluj002g",
  "createdAt": "2025-07-09T14:26:58.000Z",
  "userId": "a9zm7rzwgluj0003",
  "user": {
    "id": "a9zm7rzwgluj0003",
    "name": "Test Actor",
    "username": "actor",
    "host": "pasture-one-actor",
    "avatarUrl": "http://misskey/identicon/actor@pasture-one-actor",
    "avatarBlurhash": null,
    "avatarDecorations": [],
    "isBot": false,
    "isCat": false,
    "instance": {
      "name": null,
      "softwareName": null,
      "softwareVersion": null,
      "iconUrl": null,
      "faviconUrl": null,
      "themeColor": null
    },
    "emojis": {},
    "onlineStatus": "unknown"
  },
  "text": "text",
  "cw": null,
  "visibility": "public",
  "localOnly": false,
  "reactionAcceptance": null,
  "renoteCount": 0,
  "repliesCount": 0,
  "reactionCount": 0,
  "reactions": {},
  "reactionEmojis": {},
  "emojis": {},
  "fileIds": [],
  "files": [],
  "replyId": null,
  "renoteId": null,
  "uri": "http://pasture-one-actor/actor/w7z3wFK6vKc",
  "clippedCount": 0
}

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": [
    "https://www.w3.org/ns/activitystreams#Public",
    "http://misskey/users/a9zm65u3q2990003"
  ],
  "id": "http://pasture-one-actor/actor/69RATIeYwhQ",
  "published": "2025-07-09T14:26:59Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://misskey/users/a9zm65u3q2990003"
    ],
    "id": "http://pasture-one-actor/actor/dykwclYm-o0",
    "published": "2025-07-09T14:26:59Z",
    "content": "text",
    "tag": {
      "type": "as:Mention",
      "name": "yay",
      "href": "http://pasture-one-actor/actor"
    }
  }
}
misskey
{
  "id": "a9zma248gluj002h",
  "createdAt": "2025-07-09T14:26:59.000Z",
  "userId": "a9zm7rzwgluj0003",
  "user": {
    "id": "a9zm7rzwgluj0003",
    "name": "Test Actor",
    "username": "actor",
    "host": "pasture-one-actor",
    "avatarUrl": "http://misskey/identicon/actor@pasture-one-actor",
    "avatarBlurhash": null,
    "avatarDecorations": [],
    "isBot": false,
    "isCat": false,
    "instance": {
      "name": null,
      "softwareName": null,
      "softwareVersion": null,
      "iconUrl": null,
      "faviconUrl": null,
      "themeColor": null
    },
    "emojis": {},
    "onlineStatus": "unknown"
  },
  "text": "text",
  "cw": null,
  "visibility": "public",
  "localOnly": false,
  "reactionAcceptance": null,
  "renoteCount": 0,
  "repliesCount": 0,
  "reactionCount": 0,
  "reactions": {},
  "reactionEmojis": {},
  "emojis": {},
  "fileIds": [],
  "files": [],
  "replyId": null,
  "renoteId": null,
  "uri": "http://pasture-one-actor/actor/dykwclYm-o0",
  "clippedCount": 0
}