ActivityPub Viewer

A small tool to view real-world ActivityPub objects as JSON! Enter a URL or username from Mastodon or a similar service below, and we'll send a request with the right Accept header to the server to view the underlying object.

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{ "@context": [ "https://www.w3.org/ns/activitystreams", { "ostatus": "http://ostatus.org#", "atomUri": "ostatus:atomUri", "inReplyToAtomUri": "ostatus:inReplyToAtomUri", "conversation": "ostatus:conversation", "sensitive": "as:sensitive", "toot": "http://joinmastodon.org/ns#", "votersCount": "toot:votersCount", "Hashtag": "as:Hashtag" } ], "id": "https://mathstodon.xyz/users/caten/statuses/114621860377279046", "type": "Note", "summary": null, "inReplyTo": "https://mathstodon.xyz/users/caten/statuses/114621836367294851", "published": "2025-06-03T22:46:29Z", "url": "https://mathstodon.xyz/@caten/114621860377279046", "attributedTo": "https://mathstodon.xyz/users/caten", "to": [ "https://www.w3.org/ns/activitystreams#Public" ], "cc": [ "https://mathstodon.xyz/users/caten/followers" ], "sensitive": false, "atomUri": "https://mathstodon.xyz/users/caten/statuses/114621860377279046", "inReplyToAtomUri": "https://mathstodon.xyz/users/caten/statuses/114621836367294851", "conversation": "tag:mathstodon.xyz,2025-06-03:objectId=156437396:objectType=Conversation", "content": "<p>Oh, I forgot my other complaint.</p><p>4) The reference implementation Radicle client is written in <a href=\"https://mathstodon.xyz/tags/Rust\" class=\"mention hashtag\" rel=\"tag\">#<span>Rust</span></a>. Not necessarily a problem, since if the protocol takes off there will certainly be implementations in more mature languages like <a href=\"https://mathstodon.xyz/tags/Python\" class=\"mention hashtag\" rel=\"tag\">#<span>Python</span></a> or <a href=\"https://mathstodon.xyz/tags/CPlusPlus\" class=\"mention hashtag\" rel=\"tag\">#<span>CPlusPlus</span></a>, but I don&#39;t love the extra bit of uncertainly with a new language along with a new protocol.</p>", "contentMap": { "en": "<p>Oh, I forgot my other complaint.</p><p>4) The reference implementation Radicle client is written in <a href=\"https://mathstodon.xyz/tags/Rust\" class=\"mention hashtag\" rel=\"tag\">#<span>Rust</span></a>. Not necessarily a problem, since if the protocol takes off there will certainly be implementations in more mature languages like <a href=\"https://mathstodon.xyz/tags/Python\" class=\"mention hashtag\" rel=\"tag\">#<span>Python</span></a> or <a href=\"https://mathstodon.xyz/tags/CPlusPlus\" class=\"mention hashtag\" rel=\"tag\">#<span>CPlusPlus</span></a>, but I don&#39;t love the extra bit of uncertainly with a new language along with a new protocol.</p>" }, "attachment": [], "tag": [ { "type": "Hashtag", "href": "https://mathstodon.xyz/tags/cplusplus", "name": "#cplusplus" }, { "type": "Hashtag", "href": "https://mathstodon.xyz/tags/python", "name": "#python" }, { "type": "Hashtag", "href": "https://mathstodon.xyz/tags/rust", "name": "#rust" } ], "replies": { "id": "https://mathstodon.xyz/users/caten/statuses/114621860377279046/replies", "type": "Collection", "first": { "type": "CollectionPage", "next": "https://mathstodon.xyz/users/caten/statuses/114621860377279046/replies?only_other_accounts=true&page=true", "partOf": "https://mathstodon.xyz/users/caten/statuses/114621860377279046/replies", "items": [] } }, "likes": { "id": "https://mathstodon.xyz/users/caten/statuses/114621860377279046/likes", "type": "Collection", "totalItems": 0 }, "shares": { "id": "https://mathstodon.xyz/users/caten/statuses/114621860377279046/shares", "type": "Collection", "totalItems": 0 } }