> NOTICE — Pre-launch build. Every record here is a dated observation of a real MCP endpoint operated by a third party, rendered from the published archive. Coverage is partial — the figures cover the snapshots in the export this build was made from, not the whole chain and not the whole ecosystem. Claims and badges are not open.

# agent-observatory-sensor.nolimit-observatory.workers.dev/s/http-431/mcp

Last observed: 2026-10-02T09:23:47.359Z
Recorded as: OK
Transport: streamable-http
Observations held: 24
Published: yes

## Observations

| Observed | Snapshot | Recorded as | Detail | Latency ms | Tools | Tool schema fingerprint |
|---|---|---|---|---|---|---|
| 2026-09-09T09:42:00.810Z | REL-SNAP-036 | OK | - | 54 | 29 | 1495456958348ee2164b6dc74c5168f3522664c75764e8be77d657a36611caaa |
| 2026-09-10T09:34:55.392Z | REL-SNAP-037 | OK | - | 50 | 30 | 6f5848330851eaeb3e59f75940216d72707555906d8f18329acbda29d469749b |
| 2026-09-11T09:34:31.289Z | REL-SNAP-038 | OK | - | 46 | 30 | 6f5848330851eaeb3e59f75940216d72707555906d8f18329acbda29d469749b |
| 2026-09-12T09:26:00.736Z | REL-SNAP-039 | OK | - | 45 | 30 | 6f5848330851eaeb3e59f75940216d72707555906d8f18329acbda29d469749b |
| 2026-09-13T09:53:13.749Z | REL-SNAP-040 | OK | - | 50 | 30 | 6f5848330851eaeb3e59f75940216d72707555906d8f18329acbda29d469749b |
| 2026-09-14T09:56:39.342Z | REL-SNAP-041 | OK | - | 47 | 30 | 6f5848330851eaeb3e59f75940216d72707555906d8f18329acbda29d469749b |
| 2026-09-15T09:46:48.802Z | REL-SNAP-042 | OK | - | 49 | 30 | 6f5848330851eaeb3e59f75940216d72707555906d8f18329acbda29d469749b |
| 2026-09-16T10:11:10.437Z | REL-SNAP-043 | OK | - | 51 | 30 | 6f5848330851eaeb3e59f75940216d72707555906d8f18329acbda29d469749b |
| 2026-09-17T09:55:28.439Z | REL-SNAP-044 | OK | - | 50 | 30 | 6f5848330851eaeb3e59f75940216d72707555906d8f18329acbda29d469749b |
| 2026-09-18T09:45:26.335Z | REL-SNAP-045 | OK | - | 47 | 30 | 6f5848330851eaeb3e59f75940216d72707555906d8f18329acbda29d469749b |
| 2026-09-19T09:31:08.213Z | REL-SNAP-046 | OK | - | 56 | 30 | 6f5848330851eaeb3e59f75940216d72707555906d8f18329acbda29d469749b |
| 2026-09-20T09:46:55.663Z | REL-SNAP-047 | OK | - | 40 | 30 | 6f5848330851eaeb3e59f75940216d72707555906d8f18329acbda29d469749b |
| 2026-09-21T09:28:02.597Z | REL-SNAP-048 | OK | - | 59 | 30 | 6f5848330851eaeb3e59f75940216d72707555906d8f18329acbda29d469749b |
| 2026-09-22T09:43:54.641Z | REL-SNAP-049 | OK | - | 89 | 30 | 6f5848330851eaeb3e59f75940216d72707555906d8f18329acbda29d469749b |
| 2026-09-23T10:04:32.380Z | REL-SNAP-050 | OK | - | 48 | 31 | 297849372cb46c666059b7114248b67731c85d1454d84a7a607c8efeb6c2938f |
| 2026-09-24T10:00:06.711Z | REL-SNAP-051 | OK | - | 50 | 31 | 393cc7a816f5d702315d4ab9cc0909bdcbd9ed8230fc8ffd83e602dc15f628a1 |
| 2026-09-25T09:56:35.612Z | REL-SNAP-052 | OK | - | 49 | 31 | 393cc7a816f5d702315d4ab9cc0909bdcbd9ed8230fc8ffd83e602dc15f628a1 |
| 2026-09-26T09:33:17.083Z | REL-SNAP-053 | OK | - | 61 | 31 | 393cc7a816f5d702315d4ab9cc0909bdcbd9ed8230fc8ffd83e602dc15f628a1 |
| 2026-09-27T09:46:09.322Z | REL-SNAP-054 | OK | - | 53 | 31 | 393cc7a816f5d702315d4ab9cc0909bdcbd9ed8230fc8ffd83e602dc15f628a1 |
| 2026-09-28T10:00:36.472Z | REL-SNAP-055 | OK | - | 47 | 31 | 393cc7a816f5d702315d4ab9cc0909bdcbd9ed8230fc8ffd83e602dc15f628a1 |
| 2026-09-29T09:47:54.765Z | REL-SNAP-056 | OK | - | 59 | 31 | 393cc7a816f5d702315d4ab9cc0909bdcbd9ed8230fc8ffd83e602dc15f628a1 |
| 2026-09-30T09:52:03.631Z | REL-SNAP-057 | OK | - | 45 | 31 | 393cc7a816f5d702315d4ab9cc0909bdcbd9ed8230fc8ffd83e602dc15f628a1 |
| 2026-10-01T09:27:43.565Z | REL-SNAP-058 | OK | - | 86 | 31 | 393cc7a816f5d702315d4ab9cc0909bdcbd9ed8230fc8ffd83e602dc15f628a1 |
| 2026-10-02T09:23:47.359Z | REL-SNAP-059 | OK | - | 50 | 31 | 393cc7a816f5d702315d4ab9cc0909bdcbd9ed8230fc8ffd83e602dc15f628a1 |

## Identity

Record key: agent-observatory-sensor.nolimit-observatory.workers.dev/s/http-431/mcp (the normalised endpoint observed)
Registry names (not anchored — no inclusion proof reaches this field): io.github.sadri-dridi/http-431 (what the registry said when we swept it, as observed by us — not evidence that the registry was correct, that the name belongs to whoever registered it, or that it still resolves)
Name reported by the server: HTTP 431 header-fields-too-large (self-reported, unverified, never used as identity)

Each observation carries a merkle leaf in the snapshot it belongs to. The chain
establishes that a root existed by a given time; it does not establish that any
measurement is true.