> 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.

# acuity-scheduling.usefulapi.io/mcp

Last observed: 2026-10-02T08:52:08.191Z
Recorded as: RATE_LIMITED (http_429)
Transport: streamable-http
Observations held: 58
Published: yes

## Observations

| Observed | Snapshot | Recorded as | Detail | Latency ms | Tools | Tool schema fingerprint |
|---|---|---|---|---|---|---|
| 2026-08-06T17:53:45.520Z | REL-SNAP-002 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-07T08:39:55.257Z | REL-SNAP-003 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-08T10:21:21.413Z | REL-SNAP-004 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-09T09:02:38.635Z | REL-SNAP-005 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-10T09:01:12.025Z | REL-SNAP-006 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-11T09:04:11.932Z | REL-SNAP-007 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-12T09:02:58.614Z | REL-SNAP-008 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-13T08:56:40.654Z | REL-SNAP-009 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-14T09:09:03.048Z | REL-SNAP-010 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-15T08:59:39.247Z | REL-SNAP-011 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-16T09:00:12.635Z | REL-SNAP-012 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-17T11:31:05.319Z | REL-SNAP-013 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-18T08:58:41.892Z | REL-SNAP-014 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-19T08:47:56.878Z | REL-SNAP-015 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-20T08:56:25.894Z | REL-SNAP-016 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-21T09:12:10.864Z | REL-SNAP-017 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-22T08:49:08.763Z | REL-SNAP-018 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-23T09:50:10.338Z | REL-SNAP-019 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-24T08:52:26.203Z | REL-SNAP-020 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-25T08:54:23.078Z | REL-SNAP-021 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-26T08:50:43.621Z | REL-SNAP-022 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-27T09:03:27.501Z | REL-SNAP-023 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-28T09:01:30.434Z | REL-SNAP-024 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-29T08:51:36.394Z | REL-SNAP-025 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-30T08:53:32.413Z | REL-SNAP-026 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-31T08:56:52.061Z | REL-SNAP-027 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-01T08:52:03.533Z | REL-SNAP-028 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-02T08:59:12.051Z | REL-SNAP-029 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-03T09:21:08.414Z | REL-SNAP-030 | OK | - | 331 | 18 | dc9a09442500d2c030e68723c7ab6147132008e49947cbc78235e065b2fb2731 |
| 2026-09-04T09:09:33.079Z | REL-SNAP-031 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-05T08:56:34.426Z | REL-SNAP-032 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-06T09:05:52.582Z | REL-SNAP-033 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-07T09:20:33.206Z | REL-SNAP-034 | PROTOCOL_ERROR | post_rejected | - | - | - |
| 2026-09-08T09:13:03.248Z | REL-SNAP-035 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-09T09:06:07.250Z | REL-SNAP-036 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-10T09:00:01.012Z | REL-SNAP-037 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-11T08:59:09.186Z | REL-SNAP-038 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-12T08:51:24.832Z | REL-SNAP-039 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-13T09:18:35.266Z | REL-SNAP-040 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-14T09:18:05.405Z | REL-SNAP-041 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-15T09:10:34.100Z | REL-SNAP-042 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-16T09:30:31.571Z | REL-SNAP-043 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-17T09:13:21.712Z | REL-SNAP-044 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-18T09:09:07.004Z | REL-SNAP-045 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-19T08:56:03.463Z | REL-SNAP-046 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-20T09:10:32.417Z | REL-SNAP-047 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-21T08:50:34.378Z | REL-SNAP-048 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-22T09:07:42.297Z | REL-SNAP-049 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-23T09:29:59.570Z | REL-SNAP-050 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-24T09:23:43.428Z | REL-SNAP-051 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-25T09:23:03.839Z | REL-SNAP-052 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-26T09:00:06.451Z | REL-SNAP-053 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-27T09:12:36.433Z | REL-SNAP-054 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-28T09:26:46.832Z | REL-SNAP-055 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-29T09:14:28.778Z | REL-SNAP-056 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-30T09:18:38.894Z | REL-SNAP-057 | RATE_LIMITED | http_429 | - | - | - |
| 2026-10-01T08:55:50.344Z | REL-SNAP-058 | RATE_LIMITED | http_429 | - | - | - |
| 2026-10-02T08:52:08.191Z | REL-SNAP-059 | RATE_LIMITED | http_429 | - | - | - |

## Identity

Record key: acuity-scheduling.usefulapi.io/mcp (the normalised endpoint observed)
Registry names (not anchored — no inclusion proof reaches this field): io.usefulapi/acuity-scheduling (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: not reported (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.