Basic HTML tags

Here we analyze, which types of HTML tags are allowed inside the content field. Sanitizing fields is desired behavior as seen in Section B.10 of ActivityPub.

The ✅ means that the html tag was left unchanged. ❓ indicates the content was changed, by hovering over it, one can see into what.

❓ for misskey is due us not supporting checking markdown yet.

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://pyfedi.local/c/pie",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/activity/XkRQOec8-_4",
  "published": "2025-09-08T17:27:17Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://pyfedi.local/c/pie"
    ],
    "id": "http://pasture-one-actor/object/khqdjdYGNpU",
    "published": "2025-09-08T17:27:17Z",
    "content": "<b>bold</b>",
    "tag": [
      {
        "type": "Mention",
        "href": "http://pyfedi.local/c/pie"
      }
    ]
  }
}

pyfedi

{
  "id": 24,
  "user_id": 2,
  "community_id": 1,
  "title": "(content in post body)",
  "deleted": false,
  "nsfw": false,
  "sticky": false,
  "published": "2025-09-08T17:27:17.701492Z",
  "ap_id": "http://pasture-one-actor/object/khqdjdYGNpU",
  "local": false,
  "language_id": 2,
  "removed": false,
  "locked": false
}

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://pyfedi.local/c/pie",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/activity/ejITrpq3rsY",
  "published": "2025-09-08T17:27:18Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://pyfedi.local/c/pie"
    ],
    "id": "http://pasture-one-actor/object/ElhOAaXAxgE",
    "published": "2025-09-08T17:27:18Z",
    "content": "<strong>strong</strong>",
    "tag": [
      {
        "type": "Mention",
        "href": "http://pyfedi.local/c/pie"
      }
    ]
  }
}

pyfedi

{
  "id": 25,
  "user_id": 2,
  "community_id": 1,
  "title": "(content in post body)",
  "deleted": false,
  "nsfw": false,
  "sticky": false,
  "published": "2025-09-08T17:27:18.448991Z",
  "ap_id": "http://pasture-one-actor/object/ElhOAaXAxgE",
  "local": false,
  "language_id": 2,
  "removed": false,
  "locked": false,
  "body": "strong"
}

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://pyfedi.local/c/pie",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/activity/3VZICtPerTM",
  "published": "2025-09-08T17:27:19Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://pyfedi.local/c/pie"
    ],
    "id": "http://pasture-one-actor/object/FDlnI11aSOM",
    "published": "2025-09-08T17:27:19Z",
    "content": "<i>italic</i>",
    "tag": [
      {
        "type": "Mention",
        "href": "http://pyfedi.local/c/pie"
      }
    ]
  }
}

pyfedi

{
  "id": 26,
  "user_id": 2,
  "community_id": 1,
  "title": "(content in post body)",
  "deleted": false,
  "nsfw": false,
  "sticky": false,
  "published": "2025-09-08T17:27:19.236705Z",
  "ap_id": "http://pasture-one-actor/object/FDlnI11aSOM",
  "local": false,
  "language_id": 2,
  "removed": false,
  "locked": false
}

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://pyfedi.local/c/pie",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/activity/PbSVpSSArKo",
  "published": "2025-09-08T17:27:19Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://pyfedi.local/c/pie"
    ],
    "id": "http://pasture-one-actor/object/bguR1kytOIA",
    "published": "2025-09-08T17:27:19Z",
    "content": "<em>emphasis</em>",
    "tag": [
      {
        "type": "Mention",
        "href": "http://pyfedi.local/c/pie"
      }
    ]
  }
}

pyfedi

{
  "id": 27,
  "user_id": 2,
  "community_id": 1,
  "title": "(content in post body)",
  "deleted": false,
  "nsfw": false,
  "sticky": false,
  "published": "2025-09-08T17:27:19.999443Z",
  "ap_id": "http://pasture-one-actor/object/bguR1kytOIA",
  "local": false,
  "language_id": 2,
  "removed": false,
  "locked": false,
  "body": "emphasis"
}

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://pyfedi.local/c/pie",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/activity/icri8sMhwpU",
  "published": "2025-09-08T17:27:20Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://pyfedi.local/c/pie"
    ],
    "id": "http://pasture-one-actor/object/1xFN13x3jG4",
    "published": "2025-09-08T17:27:20Z",
    "content": "<s>stricken</s>",
    "tag": [
      {
        "type": "Mention",
        "href": "http://pyfedi.local/c/pie"
      }
    ]
  }
}

pyfedi

{
  "id": 28,
  "user_id": 2,
  "community_id": 1,
  "title": "(content in post body)",
  "deleted": false,
  "nsfw": false,
  "sticky": false,
  "published": "2025-09-08T17:27:20.794453Z",
  "ap_id": "http://pasture-one-actor/object/1xFN13x3jG4",
  "local": false,
  "language_id": 2,
  "removed": false,
  "locked": false,
  "body": "stricken"
}

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://pyfedi.local/c/pie",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/activity/FI_KTt8AHdc",
  "published": "2025-09-08T17:27:21Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://pyfedi.local/c/pie"
    ],
    "id": "http://pasture-one-actor/object/XFO615PFICM",
    "published": "2025-09-08T17:27:21Z",
    "content": "<ol><li>ordered</li></ol>",
    "tag": [
      {
        "type": "Mention",
        "href": "http://pyfedi.local/c/pie"
      }
    ]
  }
}

pyfedi

{
  "id": 29,
  "user_id": 2,
  "community_id": 1,
  "title": "(content in post body)",
  "deleted": false,
  "nsfw": false,
  "sticky": false,
  "published": "2025-09-08T17:27:21.552078Z",
  "ap_id": "http://pasture-one-actor/object/XFO615PFICM",
  "local": false,
  "language_id": 2,
  "removed": false,
  "locked": false,
  "body": "ordered"
}

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://pyfedi.local/c/pie",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/activity/xLfbvkt2cBA",
  "published": "2025-09-08T17:27:22Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://pyfedi.local/c/pie"
    ],
    "id": "http://pasture-one-actor/object/_xSEK2_yfJo",
    "published": "2025-09-08T17:27:22Z",
    "content": "<ul><li>unordered</li></ul>",
    "tag": [
      {
        "type": "Mention",
        "href": "http://pyfedi.local/c/pie"
      }
    ]
  }
}

pyfedi

{
  "id": 30,
  "user_id": 2,
  "community_id": 1,
  "title": "(content in post body)",
  "deleted": false,
  "nsfw": false,
  "sticky": false,
  "published": "2025-09-08T17:27:22.320643Z",
  "ap_id": "http://pasture-one-actor/object/_xSEK2_yfJo",
  "local": false,
  "language_id": 2,
  "removed": false,
  "locked": false,
  "body": "unordered"
}

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://pyfedi.local/c/pie",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/activity/tHuKDc5c35I",
  "published": "2025-09-08T17:27:22Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://pyfedi.local/c/pie"
    ],
    "id": "http://pasture-one-actor/object/LAjwWOQqSTg",
    "published": "2025-09-08T17:27:22Z",
    "content": "<h1>h1</h1>",
    "tag": [
      {
        "type": "Mention",
        "href": "http://pyfedi.local/c/pie"
      }
    ]
  }
}

pyfedi

{
  "id": 31,
  "user_id": 2,
  "community_id": 1,
  "title": "(content in post body)",
  "deleted": false,
  "nsfw": false,
  "sticky": false,
  "published": "2025-09-08T17:27:23.106446Z",
  "ap_id": "http://pasture-one-actor/object/LAjwWOQqSTg",
  "local": false,
  "language_id": 2,
  "removed": false,
  "locked": false,
  "body": "h1"
}

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://pyfedi.local/c/pie",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/activity/ngLw8imxd8A",
  "published": "2025-09-08T17:27:23Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://pyfedi.local/c/pie"
    ],
    "id": "http://pasture-one-actor/object/A4vSsfoTyaI",
    "published": "2025-09-08T17:27:23Z",
    "content": "<h2>h2</h2>",
    "tag": [
      {
        "type": "Mention",
        "href": "http://pyfedi.local/c/pie"
      }
    ]
  }
}

pyfedi

{
  "id": 32,
  "user_id": 2,
  "community_id": 1,
  "title": "(content in post body)",
  "deleted": false,
  "nsfw": false,
  "sticky": false,
  "published": "2025-09-08T17:27:23.929503Z",
  "ap_id": "http://pasture-one-actor/object/A4vSsfoTyaI",
  "local": false,
  "language_id": 2,
  "removed": false,
  "locked": false,
  "body": "h2"
}

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://pyfedi.local/c/pie",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/activity/c2MlahPlKEU",
  "published": "2025-09-08T17:27:24Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://pyfedi.local/c/pie"
    ],
    "id": "http://pasture-one-actor/object/BoZECMcDSKQ",
    "published": "2025-09-08T17:27:24Z",
    "content": "<h3>h3</h3>",
    "tag": [
      {
        "type": "Mention",
        "href": "http://pyfedi.local/c/pie"
      }
    ]
  }
}

pyfedi

{
  "id": 33,
  "user_id": 2,
  "community_id": 1,
  "title": "(content in post body)",
  "deleted": false,
  "nsfw": false,
  "sticky": false,
  "published": "2025-09-08T17:27:24.730209Z",
  "ap_id": "http://pasture-one-actor/object/BoZECMcDSKQ",
  "local": false,
  "language_id": 2,
  "removed": false,
  "locked": false,
  "body": "h3"
}

Example 11

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://pyfedi.local/c/pie",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/activity/-8wvz-rtPHY",
  "published": "2025-09-08T17:27:25Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://pyfedi.local/c/pie"
    ],
    "id": "http://pasture-one-actor/object/gmOVsA0c80Y",
    "published": "2025-09-08T17:27:25Z",
    "content": "<h4>h4</h4>",
    "tag": [
      {
        "type": "Mention",
        "href": "http://pyfedi.local/c/pie"
      }
    ]
  }
}

pyfedi

{
  "id": 34,
  "user_id": 2,
  "community_id": 1,
  "title": "(content in post body)",
  "deleted": false,
  "nsfw": false,
  "sticky": false,
  "published": "2025-09-08T17:27:25.484255Z",
  "ap_id": "http://pasture-one-actor/object/gmOVsA0c80Y",
  "local": false,
  "language_id": 2,
  "removed": false,
  "locked": false,
  "body": "h4"
}

Example 12

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://pyfedi.local/c/pie",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/activity/LwtWcyrkfNg",
  "published": "2025-09-08T17:27:26Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://pyfedi.local/c/pie"
    ],
    "id": "http://pasture-one-actor/object/Gi36Ve6TWcM",
    "published": "2025-09-08T17:27:26Z",
    "content": "<h5>h5</h5>",
    "tag": [
      {
        "type": "Mention",
        "href": "http://pyfedi.local/c/pie"
      }
    ]
  }
}

pyfedi

{
  "id": 35,
  "user_id": 2,
  "community_id": 1,
  "title": "(content in post body)",
  "deleted": false,
  "nsfw": false,
  "sticky": false,
  "published": "2025-09-08T17:27:26.275540Z",
  "ap_id": "http://pasture-one-actor/object/Gi36Ve6TWcM",
  "local": false,
  "language_id": 2,
  "removed": false,
  "locked": false,
  "body": "h5"
}

Example 13

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://pyfedi.local/c/pie",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/activity/QVkMpAvl6d8",
  "published": "2025-09-08T17:27:26Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://pyfedi.local/c/pie"
    ],
    "id": "http://pasture-one-actor/object/o2wwSWCmF40",
    "published": "2025-09-08T17:27:26Z",
    "content": "<code>code</code>",
    "tag": [
      {
        "type": "Mention",
        "href": "http://pyfedi.local/c/pie"
      }
    ]
  }
}

pyfedi

{
  "id": 36,
  "user_id": 2,
  "community_id": 1,
  "title": "(content in post body)",
  "deleted": false,
  "nsfw": false,
  "sticky": false,
  "published": "2025-09-08T17:27:27.066983Z",
  "ap_id": "http://pasture-one-actor/object/o2wwSWCmF40",
  "local": false,
  "language_id": 2,
  "removed": false,
  "locked": false,
  "body": "code"
}

Example 14

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://pyfedi.local/c/pie",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/activity/DRXkAEcetIE",
  "published": "2025-09-08T17:27:27Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://pyfedi.local/c/pie"
    ],
    "id": "http://pasture-one-actor/object/QQVs8erVrAY",
    "published": "2025-09-08T17:27:27Z",
    "content": "<pre>pre</pre>",
    "tag": [
      {
        "type": "Mention",
        "href": "http://pyfedi.local/c/pie"
      }
    ]
  }
}

pyfedi

{
  "id": 37,
  "user_id": 2,
  "community_id": 1,
  "title": "(content in post body)",
  "deleted": false,
  "nsfw": false,
  "sticky": false,
  "published": "2025-09-08T17:27:27.871230Z",
  "ap_id": "http://pasture-one-actor/object/QQVs8erVrAY",
  "local": false,
  "language_id": 2,
  "removed": false,
  "locked": false,
  "body": "pre"
}

Example 15

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://pyfedi.local/c/pie",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/activity/viQOFWLseLQ",
  "published": "2025-09-08T17:27:28Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://pyfedi.local/c/pie"
    ],
    "id": "http://pasture-one-actor/object/pW9CdkwzCZY",
    "published": "2025-09-08T17:27:28Z",
    "content": "<blockquote>blockquote</blockquote>",
    "tag": [
      {
        "type": "Mention",
        "href": "http://pyfedi.local/c/pie"
      }
    ]
  }
}

pyfedi

{
  "id": 38,
  "user_id": 2,
  "community_id": 1,
  "title": "[Microblog] blockquote",
  "deleted": false,
  "nsfw": false,
  "sticky": false,
  "published": "2025-09-08T17:27:28.630052Z",
  "ap_id": "http://pasture-one-actor/object/pW9CdkwzCZY",
  "local": false,
  "language_id": 2,
  "removed": false,
  "locked": false,
  "body": "blockquote"
}

Example 16

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://pyfedi.local/c/pie",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/activity/YHNjuaGaoSY",
  "published": "2025-09-08T17:27:29Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://pyfedi.local/c/pie"
    ],
    "id": "http://pasture-one-actor/object/V0IiFXgSrzU",
    "published": "2025-09-08T17:27:29Z",
    "content": "line<br>break",
    "tag": [
      {
        "type": "Mention",
        "href": "http://pyfedi.local/c/pie"
      }
    ]
  }
}

pyfedi

{
  "id": 39,
  "user_id": 2,
  "community_id": 1,
  "title": "[Microblog] line break",
  "deleted": false,
  "nsfw": false,
  "sticky": false,
  "published": "2025-09-08T17:27:29.440009Z",
  "ap_id": "http://pasture-one-actor/object/V0IiFXgSrzU",
  "local": false,
  "language_id": 2,
  "removed": false,
  "locked": false,
  "body": "linebreak"
}

Example 17

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://pyfedi.local/c/pie",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/activity/Dfy8RfwPvnk",
  "published": "2025-09-08T17:27:30Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://pyfedi.local/c/pie"
    ],
    "id": "http://pasture-one-actor/object/FOlSCioriuI",
    "published": "2025-09-08T17:27:30Z",
    "content": "<p>paragraph</p>",
    "tag": [
      {
        "type": "Mention",
        "href": "http://pyfedi.local/c/pie"
      }
    ]
  }
}

pyfedi

{
  "id": 40,
  "user_id": 2,
  "community_id": 1,
  "title": "(content in post body)",
  "deleted": false,
  "nsfw": false,
  "sticky": false,
  "published": "2025-09-08T17:27:30.185334Z",
  "ap_id": "http://pasture-one-actor/object/FOlSCioriuI",
  "local": false,
  "language_id": 2,
  "removed": false,
  "locked": false,
  "body": "paragraph"
}

Example 18

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://pyfedi.local/c/pie",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/activity/FWRQMcg90wE",
  "published": "2025-09-08T17:27:30Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://pyfedi.local/c/pie"
    ],
    "id": "http://pasture-one-actor/object/bMg_FMZu13I",
    "published": "2025-09-08T17:27:30Z",
    "content": "<small>small</small>",
    "tag": [
      {
        "type": "Mention",
        "href": "http://pyfedi.local/c/pie"
      }
    ]
  }
}

pyfedi

{
  "id": 41,
  "user_id": 2,
  "community_id": 1,
  "title": "(content in post body)",
  "deleted": false,
  "nsfw": false,
  "sticky": false,
  "published": "2025-09-08T17:27:30.988601Z",
  "ap_id": "http://pasture-one-actor/object/bMg_FMZu13I",
  "local": false,
  "language_id": 2,
  "removed": false,
  "locked": false,
  "body": "small"
}

Example 19

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://pyfedi.local/c/pie",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/activity/W50NbBjEzDs",
  "published": "2025-09-08T17:27:31Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://pyfedi.local/c/pie"
    ],
    "id": "http://pasture-one-actor/object/92WaNxsi5V8",
    "published": "2025-09-08T17:27:31Z",
    "content": "<sup>sup</sup>",
    "tag": [
      {
        "type": "Mention",
        "href": "http://pyfedi.local/c/pie"
      }
    ]
  }
}

pyfedi

{
  "id": 42,
  "user_id": 2,
  "community_id": 1,
  "title": "(content in post body)",
  "deleted": false,
  "nsfw": false,
  "sticky": false,
  "published": "2025-09-08T17:27:31.768674Z",
  "ap_id": "http://pasture-one-actor/object/92WaNxsi5V8",
  "local": false,
  "language_id": 2,
  "removed": false,
  "locked": false,
  "body": "sup"
}

Example 20

activity

{
  "@context": [
    "https://www.w3.org/ns/activitystreams",
    {
      "Hashtag": "as:Hashtag",
      "sensitive": "as:sensitive"
    }
  ],
  "type": "Create",
  "actor": "http://pasture-one-actor/actor",
  "to": [
    "http://pyfedi.local/c/pie",
    "https://www.w3.org/ns/activitystreams#Public"
  ],
  "id": "http://pasture-one-actor/activity/gotFawJgDSc",
  "published": "2025-09-08T17:27:32Z",
  "object": {
    "type": "Note",
    "attributedTo": "http://pasture-one-actor/actor",
    "to": [
      "https://www.w3.org/ns/activitystreams#Public",
      "http://pyfedi.local/c/pie"
    ],
    "id": "http://pasture-one-actor/object/2OihERUN1Q0",
    "published": "2025-09-08T17:27:32Z",
    "content": "<sub>sub</sub>",
    "tag": [
      {
        "type": "Mention",
        "href": "http://pyfedi.local/c/pie"
      }
    ]
  }
}

pyfedi

{
  "id": 43,
  "user_id": 2,
  "community_id": 1,
  "title": "(content in post body)",
  "deleted": false,
  "nsfw": false,
  "sticky": false,
  "published": "2025-09-08T17:27:32.582005Z",
  "ap_id": "http://pasture-one-actor/object/2OihERUN1Q0",
  "local": false,
  "language_id": 2,
  "removed": false,
  "locked": false,
  "body": "sub"
}