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://mstdn.party/users/austin/statuses/114557032946562389", "type": "Note", "summary": null, "inReplyTo": null, "published": "2025-05-23T12:00:02Z", "url": "https://mstdn.party/@austin/114557032946562389", "attributedTo": "https://mstdn.party/users/austin", "to": [ "https://www.w3.org/ns/activitystreams#Public" ], "cc": [ "https://mstdn.party/users/austin/followers" ], "sensitive": false, "atomUri": "https://mstdn.party/users/austin/statuses/114557032946562389", "inReplyToAtomUri": null, "conversation": "tag:mstdn.party,2025-05-23:objectId=223222068:objectType=Conversation", "content": "<p>OSIRIS, the student-run <a href=\"https://mstdn.party/tags/cybersecurity\" class=\"mention hashtag\" rel=\"tag\">#<span>cybersecurity</span></a> research lab at NYU, is seeking <a href=\"https://mstdn.party/tags/challenge\" class=\"mention hashtag\" rel=\"tag\">#<span>challenge</span></a> writers for our upcoming CSAW <a href=\"https://mstdn.party/tags/CTF\" class=\"mention hashtag\" rel=\"tag\">#<span>CTF</span></a> later this year! (For those who don&#39;t know CSAW, it&#39;s one of the largest student-run <a href=\"https://mstdn.party/tags/cybersec\" class=\"mention hashtag\" rel=\"tag\">#<span>cybersec</span></a> events in the world: <a href=\"https://csaw.io\" target=\"_blank\" rel=\"nofollow noopener noreferrer\" translate=\"no\"><span class=\"invisible\">https://</span><span class=\"\">csaw.io</span><span class=\"invisible\"></span></a> ) Web, <a href=\"https://mstdn.party/tags/ReverseEngineering\" class=\"mention hashtag\" rel=\"tag\">#<span>ReverseEngineering</span></a>, <a href=\"https://mstdn.party/tags/pwn\" class=\"mention hashtag\" rel=\"tag\">#<span>pwn</span></a>, and <a href=\"https://mstdn.party/tags/cryptography\" class=\"mention hashtag\" rel=\"tag\">#<span>cryptography</span></a> challenges are prioritized, and all experience levels welcome. Interested? Shoot me a DM or email osiris@osiris.cyber.nyu.edu.</p><p><a href=\"https://mstdn.party/tags/infosec\" class=\"mention hashtag\" rel=\"tag\">#<span>infosec</span></a> <a href=\"https://mstdn.party/tags/BoostWelcome\" class=\"mention hashtag\" rel=\"tag\">#<span>BoostWelcome</span></a></p>", "contentMap": { "en": "<p>OSIRIS, the student-run <a href=\"https://mstdn.party/tags/cybersecurity\" class=\"mention hashtag\" rel=\"tag\">#<span>cybersecurity</span></a> research lab at NYU, is seeking <a href=\"https://mstdn.party/tags/challenge\" class=\"mention hashtag\" rel=\"tag\">#<span>challenge</span></a> writers for our upcoming CSAW <a href=\"https://mstdn.party/tags/CTF\" class=\"mention hashtag\" rel=\"tag\">#<span>CTF</span></a> later this year! (For those who don&#39;t know CSAW, it&#39;s one of the largest student-run <a href=\"https://mstdn.party/tags/cybersec\" class=\"mention hashtag\" rel=\"tag\">#<span>cybersec</span></a> events in the world: <a href=\"https://csaw.io\" target=\"_blank\" rel=\"nofollow noopener noreferrer\" translate=\"no\"><span class=\"invisible\">https://</span><span class=\"\">csaw.io</span><span class=\"invisible\"></span></a> ) Web, <a href=\"https://mstdn.party/tags/ReverseEngineering\" class=\"mention hashtag\" rel=\"tag\">#<span>ReverseEngineering</span></a>, <a href=\"https://mstdn.party/tags/pwn\" class=\"mention hashtag\" rel=\"tag\">#<span>pwn</span></a>, and <a href=\"https://mstdn.party/tags/cryptography\" class=\"mention hashtag\" rel=\"tag\">#<span>cryptography</span></a> challenges are prioritized, and all experience levels welcome. Interested? Shoot me a DM or email osiris@osiris.cyber.nyu.edu.</p><p><a href=\"https://mstdn.party/tags/infosec\" class=\"mention hashtag\" rel=\"tag\">#<span>infosec</span></a> <a href=\"https://mstdn.party/tags/BoostWelcome\" class=\"mention hashtag\" rel=\"tag\">#<span>BoostWelcome</span></a></p>" }, "attachment": [], "tag": [ { "type": "Hashtag", "href": "https://mstdn.party/tags/cybersecurity", "name": "#cybersecurity" }, { "type": "Hashtag", "href": "https://mstdn.party/tags/challenge", "name": "#challenge" }, { "type": "Hashtag", "href": "https://mstdn.party/tags/ctf", "name": "#ctf" }, { "type": "Hashtag", "href": "https://mstdn.party/tags/cybersec", "name": "#cybersec" }, { "type": "Hashtag", "href": "https://mstdn.party/tags/reverseengineering", "name": "#reverseengineering" }, { "type": "Hashtag", "href": "https://mstdn.party/tags/pwn", "name": "#pwn" }, { "type": "Hashtag", "href": "https://mstdn.party/tags/cryptography", "name": "#cryptography" }, { "type": "Hashtag", "href": "https://mstdn.party/tags/infosec", "name": "#infosec" }, { "type": "Hashtag", "href": "https://mstdn.party/tags/boostwelcome", "name": "#boostwelcome" } ], "replies": { "id": "https://mstdn.party/users/austin/statuses/114557032946562389/replies", "type": "Collection", "first": { "type": "CollectionPage", "next": "https://mstdn.party/users/austin/statuses/114557032946562389/replies?only_other_accounts=true&page=true", "partOf": "https://mstdn.party/users/austin/statuses/114557032946562389/replies", "items": [] } }, "likes": { "id": "https://mstdn.party/users/austin/statuses/114557032946562389/likes", "type": "Collection", "totalItems": 3 }, "shares": { "id": "https://mstdn.party/users/austin/statuses/114557032946562389/shares", "type": "Collection", "totalItems": 0 } }