> 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.

# nylas.usefulapi.io/mcp

Last observed: 2026-08-30T08:53:07.891Z
Recorded as: RATE_LIMITED (http_429)
Transport: streamable-http
Observations held: 25
Published: yes

## Observations

| Observed | Snapshot | Recorded as | Detail | Latency ms | Tools | Tool schema fingerprint |
|---|---|---|---|---|---|---|
| 2026-08-06T17:53:10.643Z | REL-SNAP-002 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-07T08:39:24.528Z | REL-SNAP-003 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-08T10:20:47.896Z | REL-SNAP-004 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-09T09:02:04.977Z | REL-SNAP-005 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-10T09:00:05.731Z | REL-SNAP-006 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-11T09:03:38.137Z | REL-SNAP-007 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-12T09:02:17.613Z | REL-SNAP-008 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-13T08:56:06.080Z | REL-SNAP-009 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-14T09:08:27.498Z | REL-SNAP-010 | OK | - | 58 | - | - |
| 2026-08-15T08:58:58.633Z | REL-SNAP-011 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-16T08:59:40.993Z | REL-SNAP-012 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-17T11:30:34.136Z | REL-SNAP-013 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-18T08:58:12.587Z | REL-SNAP-014 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-19T08:47:33.857Z | REL-SNAP-015 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-20T08:56:03.116Z | REL-SNAP-016 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-21T09:11:46.291Z | REL-SNAP-017 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-22T08:48:46.021Z | REL-SNAP-018 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-23T09:49:49.935Z | REL-SNAP-019 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-24T08:52:05.408Z | REL-SNAP-020 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-25T08:54:03.400Z | REL-SNAP-021 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-26T08:50:22.788Z | REL-SNAP-022 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-27T09:03:07.022Z | REL-SNAP-023 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-28T09:01:06.399Z | REL-SNAP-024 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-29T08:51:14.106Z | REL-SNAP-025 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-30T08:53:07.891Z | REL-SNAP-026 | RATE_LIMITED | http_429 | - | - | - |

## Identity

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