> 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.

# swell.usefulapi.io/mcp

Last observed: 2026-08-30T08:53:08.855Z
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 |
|---|---|---|---|---|---|---|
| 2026-08-06T17:53:10.749Z | REL-SNAP-002 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-07T08:39:25.159Z | REL-SNAP-003 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-08T10:20:48.602Z | REL-SNAP-004 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-09T09:02:05.601Z | REL-SNAP-005 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-10T09:00:06.603Z | REL-SNAP-006 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-11T09:03:38.651Z | REL-SNAP-007 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-12T09:02:18.645Z | REL-SNAP-008 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-13T08:56:06.780Z | REL-SNAP-009 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-14T09:08:28.497Z | REL-SNAP-010 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-15T08:58:59.053Z | REL-SNAP-011 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-16T08:59:41.771Z | REL-SNAP-012 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-17T11:30:34.690Z | REL-SNAP-013 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-18T08:58:13.454Z | REL-SNAP-014 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-19T08:47:34.432Z | REL-SNAP-015 | PROTOCOL_ERROR | post_rejected | - | - | - |
| 2026-08-20T08:56:03.829Z | REL-SNAP-016 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-21T09:11:47.038Z | REL-SNAP-017 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-22T08:48:46.815Z | REL-SNAP-018 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-23T09:49:50.596Z | REL-SNAP-019 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-24T08:52:06.159Z | REL-SNAP-020 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-25T08:54:04.890Z | REL-SNAP-021 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-26T08:50:23.424Z | REL-SNAP-022 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-27T09:03:07.737Z | REL-SNAP-023 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-28T09:01:07.331Z | REL-SNAP-024 | RATE_LIMITED | http_429 | - | - | - |
| 2026-08-29T08:51:14.953Z | REL-SNAP-025 | OK | - | 305 | 16 | 2c896066ff13a6698bfd450da267c27472373ee6c4f5e6ee19432419bf77c1d4 |
| 2026-08-30T08:53:08.855Z | REL-SNAP-026 | RATE_LIMITED | http_429 | - | - | - |

## Identity

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