> 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.

# mailchimp.usefulapi.io/mcp

Last observed: 2026-08-30T08:59:56.682Z
Recorded as: OK
Transport: streamable-http
Observations held: 25
Published: yes

## Observations

| Observed | Snapshot | Recorded as | Detail | Latency ms | Tools | Tool schema fingerprint |
|---|---|---|---|---|---|---|
| 2026-08-06T18:02:14.887Z | REL-SNAP-002 | OK | - | 217 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |
| 2026-08-07T08:48:25.056Z | REL-SNAP-003 | OK | - | 34 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |
| 2026-08-08T10:30:17.241Z | REL-SNAP-004 | OK | - | 43 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |
| 2026-08-09T09:11:09.346Z | REL-SNAP-005 | OK | - | 48 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |
| 2026-08-10T09:10:18.006Z | REL-SNAP-006 | OK | - | 44 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |
| 2026-08-11T09:13:26.131Z | REL-SNAP-007 | OK | - | 52 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |
| 2026-08-12T09:12:04.919Z | REL-SNAP-008 | OK | - | 44 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |
| 2026-08-13T09:05:12.479Z | REL-SNAP-009 | OK | - | 57 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |
| 2026-08-14T09:18:31.299Z | REL-SNAP-010 | OK | - | 187 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |
| 2026-08-15T09:08:58.378Z | REL-SNAP-011 | OK | - | 52 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |
| 2026-08-16T09:09:32.925Z | REL-SNAP-012 | OK | - | 669 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |
| 2026-08-17T11:39:59.002Z | REL-SNAP-013 | OK | - | 55 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |
| 2026-08-18T09:08:00.185Z | REL-SNAP-014 | OK | - | 81 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |
| 2026-08-19T08:54:22.868Z | REL-SNAP-015 | OK | - | 52 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |
| 2026-08-20T09:02:54.909Z | REL-SNAP-016 | OK | - | 53 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |
| 2026-08-21T09:18:27.132Z | REL-SNAP-017 | OK | - | 45 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |
| 2026-08-22T08:55:09.653Z | REL-SNAP-018 | OK | - | 213 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |
| 2026-08-23T09:55:46.246Z | REL-SNAP-019 | OK | - | 194 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |
| 2026-08-24T08:58:33.344Z | REL-SNAP-020 | OK | - | 45 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |
| 2026-08-25T09:00:27.320Z | REL-SNAP-021 | OK | - | 59 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |
| 2026-08-26T08:56:52.631Z | REL-SNAP-022 | OK | - | 64 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |
| 2026-08-27T09:10:17.828Z | REL-SNAP-023 | OK | - | 51 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |
| 2026-08-28T09:08:19.422Z | REL-SNAP-024 | OK | - | 53 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |
| 2026-08-29T08:58:09.062Z | REL-SNAP-025 | OK | - | 51 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |
| 2026-08-30T08:59:56.682Z | REL-SNAP-026 | OK | - | 61 | 18 | 3f0cd374da41ec841388527db36e34f9b9346dce2bff7446653074789374c744 |

## Identity

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