> 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.

# mailbuttons.com/api/v1/mcp/rpc

Last observed: 2026-08-30T08:52:00.089Z
Recorded as: AUTH_REQUIRED (http_401)
Transport: streamable-http
Observations held: 25
Published: yes

## Observations

| Observed | Snapshot | Recorded as | Detail | Latency ms | Tools | Tool schema fingerprint |
|---|---|---|---|---|---|---|
| 2026-08-06T17:51:36.530Z | REL-SNAP-002 | AUTH_REQUIRED | http_401 | - | - | - |
| 2026-08-07T08:37:49.331Z | REL-SNAP-003 | AUTH_REQUIRED | http_401 | - | - | - |
| 2026-08-08T10:19:13.232Z | REL-SNAP-004 | AUTH_REQUIRED | http_401 | - | - | - |
| 2026-08-09T09:00:34.547Z | REL-SNAP-005 | AUTH_REQUIRED | http_401 | - | - | - |
| 2026-08-10T08:58:16.346Z | REL-SNAP-006 | AUTH_REQUIRED | http_401 | - | - | - |
| 2026-08-11T09:01:53.026Z | REL-SNAP-007 | AUTH_REQUIRED | http_401 | - | - | - |
| 2026-08-12T09:00:34.150Z | REL-SNAP-008 | AUTH_REQUIRED | http_401 | - | - | - |
| 2026-08-13T08:54:32.021Z | REL-SNAP-009 | AUTH_REQUIRED | http_401 | - | - | - |
| 2026-08-14T09:06:42.061Z | REL-SNAP-010 | AUTH_REQUIRED | http_401 | - | - | - |
| 2026-08-15T08:57:07.515Z | REL-SNAP-011 | AUTH_REQUIRED | http_401 | - | - | - |
| 2026-08-16T08:57:55.181Z | REL-SNAP-012 | AUTH_REQUIRED | http_401 | - | - | - |
| 2026-08-17T11:28:54.946Z | REL-SNAP-013 | AUTH_REQUIRED | http_401 | - | - | - |
| 2026-08-18T08:56:24.217Z | REL-SNAP-014 | AUTH_REQUIRED | http_401 | - | - | - |
| 2026-08-19T08:46:22.216Z | REL-SNAP-015 | AUTH_REQUIRED | http_401 | - | - | - |
| 2026-08-20T08:54:49.543Z | REL-SNAP-016 | AUTH_REQUIRED | http_401 | - | - | - |
| 2026-08-21T09:10:32.907Z | REL-SNAP-017 | AUTH_REQUIRED | http_401 | - | - | - |
| 2026-08-22T08:47:33.631Z | REL-SNAP-018 | AUTH_REQUIRED | http_401 | - | - | - |
| 2026-08-23T09:48:40.097Z | REL-SNAP-019 | AUTH_REQUIRED | http_401 | - | - | - |
| 2026-08-24T08:50:54.111Z | REL-SNAP-020 | AUTH_REQUIRED | http_401 | - | - | - |
| 2026-08-25T08:52:48.533Z | REL-SNAP-021 | AUTH_REQUIRED | http_401 | - | - | - |
| 2026-08-26T08:49:07.554Z | REL-SNAP-022 | AUTH_REQUIRED | http_401 | - | - | - |
| 2026-08-27T09:01:54.985Z | REL-SNAP-023 | AUTH_REQUIRED | http_401 | - | - | - |
| 2026-08-28T08:59:56.237Z | REL-SNAP-024 | AUTH_REQUIRED | http_401 | - | - | - |
| 2026-08-29T08:50:03.487Z | REL-SNAP-025 | AUTH_REQUIRED | http_401 | - | - | - |
| 2026-08-30T08:52:00.089Z | REL-SNAP-026 | AUTH_REQUIRED | http_401 | - | - | - |

## Identity

Record key: mailbuttons.com/api/v1/mcp/rpc (the normalised endpoint observed)
Registry names (not anchored — no inclusion proof reaches this field): com.mailbuttons/mcp-server (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.