> 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.

# aircall.usefulapi.io/mcp

Last observed: 2026-10-02T08:57:05.561Z
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 |
|---|---|---|---|---|---|---|
| 2026-08-06T18:02:16.086Z | REL-SNAP-002 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-07T08:48:27.666Z | REL-SNAP-003 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-08T10:30:19.845Z | REL-SNAP-004 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-09T09:11:12.253Z | REL-SNAP-005 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-10T09:10:21.660Z | REL-SNAP-006 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-11T09:13:29.131Z | REL-SNAP-007 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-12T09:12:07.924Z | REL-SNAP-008 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-13T09:05:15.662Z | REL-SNAP-009 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-14T09:18:35.156Z | REL-SNAP-010 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-15T09:09:01.197Z | REL-SNAP-011 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-16T09:09:39.058Z | REL-SNAP-012 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-17T11:40:01.896Z | REL-SNAP-013 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-18T09:08:04.064Z | REL-SNAP-014 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-19T08:54:26.604Z | REL-SNAP-015 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-20T09:02:58.347Z | REL-SNAP-016 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-21T09:18:30.454Z | REL-SNAP-017 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-22T08:55:13.028Z | REL-SNAP-018 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-23T09:55:49.733Z | REL-SNAP-019 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-24T08:58:37.263Z | REL-SNAP-020 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-25T09:00:31.024Z | REL-SNAP-021 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-26T08:56:56.729Z | REL-SNAP-022 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-27T09:10:21.427Z | REL-SNAP-023 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-28T09:08:23.112Z | REL-SNAP-024 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-29T08:58:12.901Z | REL-SNAP-025 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-30T09:00:00.139Z | REL-SNAP-026 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-31T09:03:34.288Z | REL-SNAP-027 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-01T08:58:19.053Z | REL-SNAP-028 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-02T09:05:14.394Z | REL-SNAP-029 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-03T09:26:54.597Z | REL-SNAP-030 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-04T09:17:21.952Z | REL-SNAP-031 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-05T09:03:21.028Z | REL-SNAP-032 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-06T09:11:39.833Z | REL-SNAP-033 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-07T09:28:23.907Z | REL-SNAP-034 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-08T09:20:40.996Z | REL-SNAP-035 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-09T09:11:43.928Z | REL-SNAP-036 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-10T09:05:28.860Z | REL-SNAP-037 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-11T09:04:52.375Z | REL-SNAP-038 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-12T08:57:09.814Z | REL-SNAP-039 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-13T09:24:18.627Z | REL-SNAP-040 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-14T09:24:05.602Z | REL-SNAP-041 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-15T09:17:07.656Z | REL-SNAP-042 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-16T09:37:36.649Z | REL-SNAP-043 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-17T09:20:37.672Z | REL-SNAP-044 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-18T09:15:28.485Z | REL-SNAP-045 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-19T09:01:38.824Z | REL-SNAP-046 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-20T09:17:13.293Z | REL-SNAP-047 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-21T08:57:38.886Z | REL-SNAP-048 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-22T09:13:40.891Z | REL-SNAP-049 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-23T09:35:30.866Z | REL-SNAP-050 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-24T09:29:37.424Z | REL-SNAP-051 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-25T09:28:12.382Z | REL-SNAP-052 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-26T09:05:15.210Z | REL-SNAP-053 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-27T09:17:50.436Z | REL-SNAP-054 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-28T09:32:11.539Z | REL-SNAP-055 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-29T09:19:48.814Z | REL-SNAP-056 | RATE_LIMITED | http_429 | - | - | - |
| 2026-09-30T09:24:12.082Z | REL-SNAP-057 | RATE_LIMITED | http_429 | - | - | - |
| 2026-10-01T09:01:09.598Z | REL-SNAP-058 | RATE_LIMITED | http_429 | - | - | - |
| 2026-10-02T08:57:05.561Z | REL-SNAP-059 | RATE_LIMITED | http_429 | - | - | - |

## Identity

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