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", "blurhash": "toot:blurhash", "focalPoint": { "@container": "@list", "@id": "toot:focalPoint" }, "Hashtag": "as:Hashtag" } ], "id": "https://sigmoid.social/users/isws/statuses/114652441813057013", "type": "Note", "summary": null, "inReplyTo": null, "published": "2025-06-09T08:23:45Z", "url": "https://sigmoid.social/@isws/114652441813057013", "attributedTo": "https://sigmoid.social/users/isws", "to": [ "https://www.w3.org/ns/activitystreams#Public" ], "cc": [ "https://sigmoid.social/users/isws/followers" ], "sensitive": false, "atomUri": "https://sigmoid.social/users/isws/statuses/114652441813057013", "inReplyToAtomUri": null, "conversation": "tag:sigmoid.social,2025-06-09:objectId=59568730:objectType=Conversation", "content": "<p>In his keynote, Frank van Harmelen is recommending the following book by Turing Award winner Leslie Valiant: The Importance of Being Educable - A New Theory of Human Uniqueness.<br />Valiant argues argues that in the age of AI (and current developments in LLMs) understanding the nature of our own educability is crucial to safeguarding our future. </p><p><a href=\"https://sigmoid.social/tags/isws2025\" class=\"mention hashtag\" rel=\"tag\">#<span>isws2025</span></a> <a href=\"https://sigmoid.social/tags/keynote\" class=\"mention hashtag\" rel=\"tag\">#<span>keynote</span></a> <a href=\"https://sigmoid.social/tags/llms\" class=\"mention hashtag\" rel=\"tag\">#<span>llms</span></a> <a href=\"https://sigmoid.social/tags/AI\" class=\"mention hashtag\" rel=\"tag\">#<span>AI</span></a> <a href=\"https://sigmoid.social/tags/knowledgegraphs\" class=\"mention hashtag\" rel=\"tag\">#<span>knowledgegraphs</span></a> <a href=\"https://sigmoid.social/tags/semanticweb\" class=\"mention hashtag\" rel=\"tag\">#<span>semanticweb</span></a> <a href=\"https://sigmoid.social/tags/intelligence\" class=\"mention hashtag\" rel=\"tag\">#<span>intelligence</span></a> <a href=\"https://sigmoid.social/tags/summerschool\" class=\"mention hashtag\" rel=\"tag\">#<span>summerschool</span></a> <a href=\"https://sigmoid.social/tags/philosophy\" class=\"mention hashtag\" rel=\"tag\">#<span>philosophy</span></a></p>", "contentMap": { "en": "<p>In his keynote, Frank van Harmelen is recommending the following book by Turing Award winner Leslie Valiant: The Importance of Being Educable - A New Theory of Human Uniqueness.<br />Valiant argues argues that in the age of AI (and current developments in LLMs) understanding the nature of our own educability is crucial to safeguarding our future. </p><p><a href=\"https://sigmoid.social/tags/isws2025\" class=\"mention hashtag\" rel=\"tag\">#<span>isws2025</span></a> <a href=\"https://sigmoid.social/tags/keynote\" class=\"mention hashtag\" rel=\"tag\">#<span>keynote</span></a> <a href=\"https://sigmoid.social/tags/llms\" class=\"mention hashtag\" rel=\"tag\">#<span>llms</span></a> <a href=\"https://sigmoid.social/tags/AI\" class=\"mention hashtag\" rel=\"tag\">#<span>AI</span></a> <a href=\"https://sigmoid.social/tags/knowledgegraphs\" class=\"mention hashtag\" rel=\"tag\">#<span>knowledgegraphs</span></a> <a href=\"https://sigmoid.social/tags/semanticweb\" class=\"mention hashtag\" rel=\"tag\">#<span>semanticweb</span></a> <a href=\"https://sigmoid.social/tags/intelligence\" class=\"mention hashtag\" rel=\"tag\">#<span>intelligence</span></a> <a href=\"https://sigmoid.social/tags/summerschool\" class=\"mention hashtag\" rel=\"tag\">#<span>summerschool</span></a> <a href=\"https://sigmoid.social/tags/philosophy\" class=\"mention hashtag\" rel=\"tag\">#<span>philosophy</span></a></p>" }, "attachment": [ { "type": "Document", "mediaType": "image/jpeg", "url": "https://cdn.masto.host/sigmoidsocial/media_attachments/files/114/652/409/203/601/516/original/fbad59ef2e8e80c4.jpg", "name": "Book cover of Leslie Valiants book: The Importance of Being Educable. The book cover is simple plain cyan coloured and you see a pixelised cursor pointer in the lower part.", "blurhash": "U7C,fbtnPqt-S%ayt7kCTMjsf$bIyDfkW=j[", "focalPoint": [ 0, 0 ], "width": 329, "height": 500 } ], "tag": [ { "type": "Hashtag", "href": "https://sigmoid.social/tags/isws2025", "name": "#isws2025" }, { "type": "Hashtag", "href": "https://sigmoid.social/tags/keynote", "name": "#keynote" }, { "type": "Hashtag", "href": "https://sigmoid.social/tags/LLMs", "name": "#LLMs" }, { "type": "Hashtag", "href": "https://sigmoid.social/tags/ai", "name": "#ai" }, { "type": "Hashtag", "href": "https://sigmoid.social/tags/KnowledgeGraphs", "name": "#KnowledgeGraphs" }, { "type": "Hashtag", "href": "https://sigmoid.social/tags/semanticweb", "name": "#semanticweb" }, { "type": "Hashtag", "href": "https://sigmoid.social/tags/intelligence", "name": "#intelligence" }, { "type": "Hashtag", "href": "https://sigmoid.social/tags/summerschool", "name": "#summerschool" }, { "type": "Hashtag", "href": "https://sigmoid.social/tags/philosophy", "name": "#philosophy" } ], "replies": { "id": "https://sigmoid.social/users/isws/statuses/114652441813057013/replies", "type": "Collection", "first": { "type": "CollectionPage", "next": "https://sigmoid.social/users/isws/statuses/114652441813057013/replies?only_other_accounts=true&page=true", "partOf": "https://sigmoid.social/users/isws/statuses/114652441813057013/replies", "items": [] } }, "likes": { "id": "https://sigmoid.social/users/isws/statuses/114652441813057013/likes", "type": "Collection", "totalItems": 0 }, "shares": { "id": "https://sigmoid.social/users/isws/statuses/114652441813057013/shares", "type": "Collection", "totalItems": 2 } }