> 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.

# usaref.dev/mcp

Last observed: 2026-08-30T09:00:11.392Z
Recorded as: OK
Transport: streamable-http
Observations held: 25
Published: yes

## Observations

| Observed | Snapshot | Recorded as | Detail | Latency ms | Tools | Tool schema fingerprint |
|---|---|---|---|---|---|---|
| 2026-08-06T18:02:36.051Z | REL-SNAP-002 | OK | - | 2230 | 10 | bc5f52fb04092ffca894073113bb31227a0e0a350afffc0398b049a61e9c1068 |
| 2026-08-07T08:48:46.786Z | REL-SNAP-003 | OK | - | 2210 | 10 | bc5f52fb04092ffca894073113bb31227a0e0a350afffc0398b049a61e9c1068 |
| 2026-08-08T10:30:40.462Z | REL-SNAP-004 | OK | - | 612 | 10 | bc5f52fb04092ffca894073113bb31227a0e0a350afffc0398b049a61e9c1068 |
| 2026-08-09T09:11:32.376Z | REL-SNAP-005 | OK | - | 597 | 10 | bc5f52fb04092ffca894073113bb31227a0e0a350afffc0398b049a61e9c1068 |
| 2026-08-10T09:10:46.302Z | REL-SNAP-006 | OK | - | 659 | 10 | bc5f52fb04092ffca894073113bb31227a0e0a350afffc0398b049a61e9c1068 |
| 2026-08-11T09:13:47.856Z | REL-SNAP-007 | OK | - | 675 | 10 | bc5f52fb04092ffca894073113bb31227a0e0a350afffc0398b049a61e9c1068 |
| 2026-08-12T09:12:24.731Z | REL-SNAP-008 | OK | - | 643 | 10 | bc5f52fb04092ffca894073113bb31227a0e0a350afffc0398b049a61e9c1068 |
| 2026-08-13T09:05:31.153Z | REL-SNAP-009 | OK | - | 657 | 10 | bc5f52fb04092ffca894073113bb31227a0e0a350afffc0398b049a61e9c1068 |
| 2026-08-14T09:18:52.330Z | REL-SNAP-010 | OK | - | 652 | 10 | bc5f52fb04092ffca894073113bb31227a0e0a350afffc0398b049a61e9c1068 |
| 2026-08-15T09:09:17.104Z | REL-SNAP-011 | OK | - | 607 | 10 | bc5f52fb04092ffca894073113bb31227a0e0a350afffc0398b049a61e9c1068 |
| 2026-08-16T09:09:56.529Z | REL-SNAP-012 | OK | - | 724 | 10 | bc5f52fb04092ffca894073113bb31227a0e0a350afffc0398b049a61e9c1068 |
| 2026-08-17T11:40:19.327Z | REL-SNAP-013 | OK | - | 617 | 10 | bc5f52fb04092ffca894073113bb31227a0e0a350afffc0398b049a61e9c1068 |
| 2026-08-18T09:08:19.290Z | REL-SNAP-014 | OK | - | 678 | 10 | bc5f52fb04092ffca894073113bb31227a0e0a350afffc0398b049a61e9c1068 |
| 2026-08-19T08:54:36.686Z | REL-SNAP-015 | OK | - | 1027 | 10 | bc5f52fb04092ffca894073113bb31227a0e0a350afffc0398b049a61e9c1068 |
| 2026-08-20T09:03:08.392Z | REL-SNAP-016 | OK | - | 1541 | 10 | bc5f52fb04092ffca894073113bb31227a0e0a350afffc0398b049a61e9c1068 |
| 2026-08-21T09:18:42.953Z | REL-SNAP-017 | OK | - | 1020 | 10 | bc5f52fb04092ffca894073113bb31227a0e0a350afffc0398b049a61e9c1068 |
| 2026-08-22T08:55:23.198Z | REL-SNAP-018 | OK | - | 1516 | 10 | bc5f52fb04092ffca894073113bb31227a0e0a350afffc0398b049a61e9c1068 |
| 2026-08-23T09:55:59.790Z | REL-SNAP-019 | OK | - | 1516 | 10 | bc5f52fb04092ffca894073113bb31227a0e0a350afffc0398b049a61e9c1068 |
| 2026-08-24T08:58:47.247Z | REL-SNAP-020 | HTTP_5XX | http_521 | - | - | - |
| 2026-08-25T09:00:42.793Z | REL-SNAP-021 | OK | - | 1578 | 10 | bc5f52fb04092ffca894073113bb31227a0e0a350afffc0398b049a61e9c1068 |
| 2026-08-26T08:57:08.003Z | REL-SNAP-022 | OK | - | 1654 | 10 | bc5f52fb04092ffca894073113bb31227a0e0a350afffc0398b049a61e9c1068 |
| 2026-08-27T09:10:34.231Z | REL-SNAP-023 | OK | - | 1516 | 10 | bc5f52fb04092ffca894073113bb31227a0e0a350afffc0398b049a61e9c1068 |
| 2026-08-28T09:08:34.038Z | REL-SNAP-024 | OK | - | 1567 | 10 | bc5f52fb04092ffca894073113bb31227a0e0a350afffc0398b049a61e9c1068 |
| 2026-08-29T08:58:22.263Z | REL-SNAP-025 | OK | - | 1549 | 10 | bc5f52fb04092ffca894073113bb31227a0e0a350afffc0398b049a61e9c1068 |
| 2026-08-30T09:00:11.392Z | REL-SNAP-026 | OK | - | 985 | 10 | bc5f52fb04092ffca894073113bb31227a0e0a350afffc0398b049a61e9c1068 |

## Identity

Record key: usaref.dev/mcp (the normalised endpoint observed)
Registry names (not anchored — no inclusion proof reaches this field): dev.usaref/reference-data (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: usaref (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.