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://mastodon.sdf.org/users/davbucci/statuses/113815151359016494/replies", "type": "Collection", "first": { "id": "https://mastodon.sdf.org/users/davbucci/statuses/113815151359016494/replies?page=true", "type": "CollectionPage", "next": "https://mastodon.sdf.org/users/davbucci/statuses/113815151359016494/replies?only_other_accounts=true&page=true", "partOf": "https://mastodon.sdf.org/users/davbucci/statuses/113815151359016494/replies", "items": [ { "id": "https://mastodon.sdf.org/users/davbucci/statuses/113815200352283818", "type": "Note", "summary": null, "inReplyTo": "https://mastodon.sdf.org/users/davbucci/statuses/113815151359016494", "published": "2025-01-12T11:42:14Z", "url": "https://mastodon.sdf.org/@davbucci/113815200352283818", "attributedTo": "https://mastodon.sdf.org/users/davbucci", "to": [ "https://www.w3.org/ns/activitystreams#Public" ], "cc": [ "https://mastodon.sdf.org/users/davbucci/followers" ], "sensitive": false, "atomUri": "https://mastodon.sdf.org/users/davbucci/statuses/113815200352283818", "inReplyToAtomUri": "https://mastodon.sdf.org/users/davbucci/statuses/113815151359016494", "conversation": "tag:mastodon.sdf.org,2025-01-12:objectId=235087409:objectType=Conversation", "content": "<p>I still find the <a href=\"https://mastodon.sdf.org/tags/HP9816\" class=\"mention hashtag\" rel=\"tag\">#<span>HP9816</span></a> useful today, to control <a href=\"https://mastodon.sdf.org/tags/GPIB\" class=\"mention hashtag\" rel=\"tag\">#<span>GPIB</span></a> instruments. I wrote two programs, one to control the Bruel&amp;Kjaer 2034 audio spectrum analyzer to do third-of-octave analysis and another one to do various measurements with a <a href=\"https://mastodon.sdf.org/tags/HP4277A\" class=\"mention hashtag\" rel=\"tag\">#<span>HP4277A</span></a> LCZ meter. If I need to further process data, I download them on a modern computer using a RS232 cable I built. I transferred and published the HPBASIC source of the third of octave software on Github: <a href=\"https://github.com/DarwinNE/BK2034_GPIB/tree/master/HPBASIC\" target=\"_blank\" rel=\"nofollow noopener noreferrer\"><span class=\"invisible\">https://</span><span class=\"ellipsis\">github.com/DarwinNE/BK2034_GPI</span><span class=\"invisible\">B/tree/master/HPBASIC</span></a></p>", "contentMap": { "en": "<p>I still find the <a href=\"https://mastodon.sdf.org/tags/HP9816\" class=\"mention hashtag\" rel=\"tag\">#<span>HP9816</span></a> useful today, to control <a href=\"https://mastodon.sdf.org/tags/GPIB\" class=\"mention hashtag\" rel=\"tag\">#<span>GPIB</span></a> instruments. I wrote two programs, one to control the Bruel&amp;Kjaer 2034 audio spectrum analyzer to do third-of-octave analysis and another one to do various measurements with a <a href=\"https://mastodon.sdf.org/tags/HP4277A\" class=\"mention hashtag\" rel=\"tag\">#<span>HP4277A</span></a> LCZ meter. If I need to further process data, I download them on a modern computer using a RS232 cable I built. I transferred and published the HPBASIC source of the third of octave software on Github: <a href=\"https://github.com/DarwinNE/BK2034_GPIB/tree/master/HPBASIC\" target=\"_blank\" rel=\"nofollow noopener noreferrer\"><span class=\"invisible\">https://</span><span class=\"ellipsis\">github.com/DarwinNE/BK2034_GPI</span><span class=\"invisible\">B/tree/master/HPBASIC</span></a></p>" }, "attachment": [ { "type": "Document", "mediaType": "image/jpeg", "url": "https://mastodon.sdf.org/system/media_attachments/files/113/815/159/220/798/403/original/317d96cedeae31f3.jpg", "name": "A 1/3 of octave analysis shown on the screen of a HP9816 workstation, controlling a Bruel&Kjaer 2034 FFT audio spectrum analyzer.", "blurhash": "ULAwF+e-~pad4nxa9Ft7j]R*tRWWx]WDRkR+", "focalPoint": [ 0, 0 ], "width": 1200, "height": 900 }, { "type": "Document", "mediaType": "image/jpeg", "url": "https://mastodon.sdf.org/system/media_attachments/files/113/815/160/096/758/427/original/b0d2490835ed1ddc.jpg", "name": "The combo HP9816, the B&K 2034, a HP7470 plotter, a HP9122 disk drive and HP9134 hard disk units, all connected with GPIB.", "blurhash": "UeGuzP%hj^WU~qt8t6M|xuj]xtWBxZWCozoJ", "focalPoint": [ 0, 0 ], "width": 900, "height": 1200 }, { "type": "Document", "mediaType": "image/jpeg", "url": "https://mastodon.sdf.org/system/media_attachments/files/113/815/172/397/144/140/original/259afdf7445b5442.jpeg", "name": "A frequency analysis of the impedance (module and phase) of a LC parallel resonator. A strong peak in the module is visible, along with the phase that passes from 90° to -90° when the frequency increases.", "blurhash": "U87-pCRj4TaKD%oftRaeIAkCtRkC?^aeDjof", "focalPoint": [ -0.09, 0.1 ], "width": 1663, "height": 1247 }, { "type": "Document", "mediaType": "image/jpeg", "url": "https://mastodon.sdf.org/system/media_attachments/files/113/815/174/857/067/255/original/b40ba47fa3c60a64.jpeg", "name": "The HP4277A LCZ meter being controlled by GPIB.", "blurhash": "UFH1_7D%s;E2-pE2t7xD9cWCxtRk~VNGM|xF", "focalPoint": [ 0, 0 ], "width": 1663, "height": 1247 } ], "tag": [ { "type": "Hashtag", "href": "https://mastodon.sdf.org/tags/hp9816", "name": "#hp9816" }, { "type": "Hashtag", "href": "https://mastodon.sdf.org/tags/gpib", "name": "#gpib" }, { "type": "Hashtag", "href": "https://mastodon.sdf.org/tags/hp4277a", "name": "#hp4277a" } ], "replies": { "id": "https://mastodon.sdf.org/users/davbucci/statuses/113815200352283818/replies", "type": "Collection", "first": { "type": "CollectionPage", "next": "https://mastodon.sdf.org/users/davbucci/statuses/113815200352283818/replies?min_id=113815245713058070&page=true", "partOf": "https://mastodon.sdf.org/users/davbucci/statuses/113815200352283818/replies", "items": [ "https://mastodon.sdf.org/users/davbucci/statuses/113815245713058070" ] } } } ] } }