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",
"Hashtag": "as:Hashtag"
}
],
"id": "https://mast.hpc.social/users/ProjectPhysX/statuses/114659148482693321",
"type": "Note",
"summary": null,
"inReplyTo": null,
"published": "2025-06-10T12:49:20Z",
"url": "https://mast.hpc.social/@ProjectPhysX/114659148482693321",
"attributedTo": "https://mast.hpc.social/users/ProjectPhysX",
"to": [
"https://www.w3.org/ns/activitystreams#Public"
],
"cc": [
"https://mast.hpc.social/users/ProjectPhysX/followers"
],
"sensitive": false,
"atomUri": "https://mast.hpc.social/users/ProjectPhysX/statuses/114659148482693321",
"inReplyToAtomUri": null,
"conversation": "tag:mast.hpc.social,2025-06-10:objectId=18266339:objectType=Conversation",
"content": "<p>With all the hot discussions about <a href=\"https://mast.hpc.social/tags/FP64\" class=\"mention hashtag\" rel=\"tag\">#<span>FP64</span></a> right now, what do you say to Nvidia almost entirely axing FP64 on <a href=\"https://mast.hpc.social/tags/Blackwell\" class=\"mention hashtag\" rel=\"tag\">#<span>Blackwell</span></a> Ultra B300?</p><p>B200 180GB FP64 performance: 37.2 TFlops/s<br />B300 288GB FP64 performance: 1.2 TFlops/s ☠️</p><p>They're going from the usual datacenter <a href=\"https://mast.hpc.social/tags/GPU\" class=\"mention hashtag\" rel=\"tag\">#<span>GPU</span></a> FP64:FP32 ratio of 1:2 down to cheap 1:64, like on all their gaming/workstation GPUs.<br />Personally I think this is fantastic - it opens the doors wide for competitors to step into the <a href=\"https://mast.hpc.social/tags/HPC\" class=\"mention hashtag\" rel=\"tag\">#<span>HPC</span></a> market.</p><p><a href=\"https://www.nvidia.com/en-us/data-center/gb300-nvl72/\" target=\"_blank\" rel=\"nofollow noopener noreferrer\" translate=\"no\"><span class=\"invisible\">https://www.</span><span class=\"ellipsis\">nvidia.com/en-us/data-center/g</span><span class=\"invisible\">b300-nvl72/</span></a></p>",
"contentMap": {
"en": "<p>With all the hot discussions about <a href=\"https://mast.hpc.social/tags/FP64\" class=\"mention hashtag\" rel=\"tag\">#<span>FP64</span></a> right now, what do you say to Nvidia almost entirely axing FP64 on <a href=\"https://mast.hpc.social/tags/Blackwell\" class=\"mention hashtag\" rel=\"tag\">#<span>Blackwell</span></a> Ultra B300?</p><p>B200 180GB FP64 performance: 37.2 TFlops/s<br />B300 288GB FP64 performance: 1.2 TFlops/s ☠️</p><p>They're going from the usual datacenter <a href=\"https://mast.hpc.social/tags/GPU\" class=\"mention hashtag\" rel=\"tag\">#<span>GPU</span></a> FP64:FP32 ratio of 1:2 down to cheap 1:64, like on all their gaming/workstation GPUs.<br />Personally I think this is fantastic - it opens the doors wide for competitors to step into the <a href=\"https://mast.hpc.social/tags/HPC\" class=\"mention hashtag\" rel=\"tag\">#<span>HPC</span></a> market.</p><p><a href=\"https://www.nvidia.com/en-us/data-center/gb300-nvl72/\" target=\"_blank\" rel=\"nofollow noopener noreferrer\" translate=\"no\"><span class=\"invisible\">https://www.</span><span class=\"ellipsis\">nvidia.com/en-us/data-center/g</span><span class=\"invisible\">b300-nvl72/</span></a></p>"
},
"attachment": [],
"tag": [
{
"type": "Hashtag",
"href": "https://mast.hpc.social/tags/fp64",
"name": "#fp64"
},
{
"type": "Hashtag",
"href": "https://mast.hpc.social/tags/blackwell",
"name": "#blackwell"
},
{
"type": "Hashtag",
"href": "https://mast.hpc.social/tags/gpu",
"name": "#gpu"
},
{
"type": "Hashtag",
"href": "https://mast.hpc.social/tags/hpc",
"name": "#hpc"
}
],
"replies": {
"id": "https://mast.hpc.social/users/ProjectPhysX/statuses/114659148482693321/replies",
"type": "Collection",
"first": {
"type": "CollectionPage",
"next": "https://mast.hpc.social/users/ProjectPhysX/statuses/114659148482693321/replies?min_id=114676822514898881&page=true",
"partOf": "https://mast.hpc.social/users/ProjectPhysX/statuses/114659148482693321/replies",
"items": [
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]
}
},
"likes": {
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"type": "Collection",
"totalItems": 7
},
"shares": {
"id": "https://mast.hpc.social/users/ProjectPhysX/statuses/114659148482693321/shares",
"type": "Collection",
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}
}