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.
{
"@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://mastodon.social/users/tiago_ribeiro/statuses/114056655153228789",
"type": "Note",
"summary": null,
"inReplyTo": null,
"published": "2025-02-24T03:07:22Z",
"url": "https://mastodon.social/@tiago_ribeiro/114056655153228789",
"attributedTo": "https://mastodon.social/users/tiago_ribeiro",
"to": [
"https://www.w3.org/ns/activitystreams#Public"
],
"cc": [
"https://mastodon.social/users/tiago_ribeiro/followers"
],
"sensitive": false,
"atomUri": "https://mastodon.social/users/tiago_ribeiro/statuses/114056655153228789",
"inReplyToAtomUri": null,
"conversation": "tag:mastodon.social,2025-02-24:objectId=929284158:objectType=Conversation",
"content": "<p>Superintelligent Agents Pose Catastrophic Risks (Bengio et al., 2025)</p><p>📎<a href=\"https://arxiv.org/pdf/2502.15657\" target=\"_blank\" rel=\"nofollow noopener\" translate=\"no\"><span class=\"invisible\">https://</span><span class=\"\">arxiv.org/pdf/2502.15657</span><span class=\"invisible\"></span></a></p><p>Summary: “Leading AI firms are developing generalist agents that autonomously plan and act. These systems carry significant safety risks, such as misuse and loss of control. To address this, we propose Scientist AI—a non-agentic, explanation-based system that uses uncertainty to safeguard against overconfident, uncontrolled behavior while accelerating scientific progress.” <a href=\"https://mastodon.social/tags/AISafety\" class=\"mention hashtag\" rel=\"tag\">#<span>AISafety</span></a> <a href=\"https://mastodon.social/tags/AI\" class=\"mention hashtag\" rel=\"tag\">#<span>AI</span></a> <a href=\"https://mastodon.social/tags/Governance\" class=\"mention hashtag\" rel=\"tag\">#<span>Governance</span></a></p>",
"contentMap": {
"pt": "<p>Superintelligent Agents Pose Catastrophic Risks (Bengio et al., 2025)</p><p>📎<a href=\"https://arxiv.org/pdf/2502.15657\" target=\"_blank\" rel=\"nofollow noopener\" translate=\"no\"><span class=\"invisible\">https://</span><span class=\"\">arxiv.org/pdf/2502.15657</span><span class=\"invisible\"></span></a></p><p>Summary: “Leading AI firms are developing generalist agents that autonomously plan and act. These systems carry significant safety risks, such as misuse and loss of control. To address this, we propose Scientist AI—a non-agentic, explanation-based system that uses uncertainty to safeguard against overconfident, uncontrolled behavior while accelerating scientific progress.” <a href=\"https://mastodon.social/tags/AISafety\" class=\"mention hashtag\" rel=\"tag\">#<span>AISafety</span></a> <a href=\"https://mastodon.social/tags/AI\" class=\"mention hashtag\" rel=\"tag\">#<span>AI</span></a> <a href=\"https://mastodon.social/tags/Governance\" class=\"mention hashtag\" rel=\"tag\">#<span>Governance</span></a></p>"
},
"attachment": [
{
"type": "Document",
"mediaType": "image/png",
"url": "https://files.mastodon.social/media_attachments/files/114/056/630/993/725/046/original/e58f10b43b073d49.png",
"name": null,
"blurhash": "UBSY{q%M_3%M?bfQRjj[~qf6M{a|_3j[ayay",
"width": 862,
"height": 403
}
],
"tag": [
{
"type": "Hashtag",
"href": "https://mastodon.social/tags/aisafety",
"name": "#aisafety"
},
{
"type": "Hashtag",
"href": "https://mastodon.social/tags/ai",
"name": "#ai"
},
{
"type": "Hashtag",
"href": "https://mastodon.social/tags/governance",
"name": "#governance"
}
],
"replies": {
"id": "https://mastodon.social/users/tiago_ribeiro/statuses/114056655153228789/replies",
"type": "Collection",
"first": {
"type": "CollectionPage",
"next": "https://mastodon.social/users/tiago_ribeiro/statuses/114056655153228789/replies?only_other_accounts=true&page=true",
"partOf": "https://mastodon.social/users/tiago_ribeiro/statuses/114056655153228789/replies",
"items": []
}
},
"likes": {
"id": "https://mastodon.social/users/tiago_ribeiro/statuses/114056655153228789/likes",
"type": "Collection",
"totalItems": 0
},
"shares": {
"id": "https://mastodon.social/users/tiago_ribeiro/statuses/114056655153228789/shares",
"type": "Collection",
"totalItems": 4
}
}