> 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.

# mcp.datasetsearch.jp

Last observed: 2026-08-30T09:02:25.609Z
Recorded as: OK
Transport: streamable-http
Observations held: 23
Published: yes

## Observations

| Observed | Snapshot | Recorded as | Detail | Latency ms | Tools | Tool schema fingerprint |
|---|---|---|---|---|---|---|
| 2026-08-08T10:35:24.677Z | REL-SNAP-004 | OK | - | 358 | 3 | d93121272fbb0f12ee0f39c3e01ec943e0fd2a55830c85ebeafbe9e818325123 |
| 2026-08-09T09:15:57.421Z | REL-SNAP-005 | OK | - | 328 | 3 | d93121272fbb0f12ee0f39c3e01ec943e0fd2a55830c85ebeafbe9e818325123 |
| 2026-08-10T09:15:30.297Z | REL-SNAP-006 | OK | - | 321 | 3 | d93121272fbb0f12ee0f39c3e01ec943e0fd2a55830c85ebeafbe9e818325123 |
| 2026-08-11T09:17:55.452Z | REL-SNAP-007 | OK | - | 252 | 3 | d93121272fbb0f12ee0f39c3e01ec943e0fd2a55830c85ebeafbe9e818325123 |
| 2026-08-12T09:16:24.564Z | REL-SNAP-008 | OK | - | 250 | 3 | d93121272fbb0f12ee0f39c3e01ec943e0fd2a55830c85ebeafbe9e818325123 |
| 2026-08-13T09:09:28.446Z | REL-SNAP-009 | OK | - | 247 | 3 | d93121272fbb0f12ee0f39c3e01ec943e0fd2a55830c85ebeafbe9e818325123 |
| 2026-08-14T09:22:56.347Z | REL-SNAP-010 | OK | - | 428 | 3 | d93121272fbb0f12ee0f39c3e01ec943e0fd2a55830c85ebeafbe9e818325123 |
| 2026-08-15T09:12:57.547Z | REL-SNAP-011 | OK | - | 241 | 3 | d93121272fbb0f12ee0f39c3e01ec943e0fd2a55830c85ebeafbe9e818325123 |
| 2026-08-16T09:14:13.460Z | REL-SNAP-012 | OK | - | 252 | 3 | d93121272fbb0f12ee0f39c3e01ec943e0fd2a55830c85ebeafbe9e818325123 |
| 2026-08-17T11:43:58.291Z | REL-SNAP-013 | OK | - | 431 | 3 | d93121272fbb0f12ee0f39c3e01ec943e0fd2a55830c85ebeafbe9e818325123 |
| 2026-08-18T09:12:10.730Z | REL-SNAP-014 | OK | - | 430 | 3 | d93121272fbb0f12ee0f39c3e01ec943e0fd2a55830c85ebeafbe9e818325123 |
| 2026-08-19T08:56:59.475Z | REL-SNAP-015 | OK | - | 620 | 3 | d93121272fbb0f12ee0f39c3e01ec943e0fd2a55830c85ebeafbe9e818325123 |
| 2026-08-20T09:05:26.561Z | REL-SNAP-016 | OK | - | 572 | 3 | d93121272fbb0f12ee0f39c3e01ec943e0fd2a55830c85ebeafbe9e818325123 |
| 2026-08-21T09:20:54.870Z | REL-SNAP-017 | OK | - | 545 | 3 | d93121272fbb0f12ee0f39c3e01ec943e0fd2a55830c85ebeafbe9e818325123 |
| 2026-08-22T08:57:34.331Z | REL-SNAP-018 | OK | - | 561 | 3 | d93121272fbb0f12ee0f39c3e01ec943e0fd2a55830c85ebeafbe9e818325123 |
| 2026-08-23T09:58:18.645Z | REL-SNAP-019 | OK | - | 533 | 3 | d93121272fbb0f12ee0f39c3e01ec943e0fd2a55830c85ebeafbe9e818325123 |
| 2026-08-24T09:01:00.334Z | REL-SNAP-020 | OK | - | 576 | 3 | d93121272fbb0f12ee0f39c3e01ec943e0fd2a55830c85ebeafbe9e818325123 |
| 2026-08-25T09:03:18.366Z | REL-SNAP-021 | OK | - | 588 | 3 | d93121272fbb0f12ee0f39c3e01ec943e0fd2a55830c85ebeafbe9e818325123 |
| 2026-08-26T08:59:31.125Z | REL-SNAP-022 | OK | - | 996 | 3 | d93121272fbb0f12ee0f39c3e01ec943e0fd2a55830c85ebeafbe9e818325123 |
| 2026-08-27T09:12:57.283Z | REL-SNAP-023 | OK | - | 1009 | 3 | d93121272fbb0f12ee0f39c3e01ec943e0fd2a55830c85ebeafbe9e818325123 |
| 2026-08-28T09:10:56.654Z | REL-SNAP-024 | OK | - | 786 | 3 | d93121272fbb0f12ee0f39c3e01ec943e0fd2a55830c85ebeafbe9e818325123 |
| 2026-08-29T09:00:35.228Z | REL-SNAP-025 | OK | - | 582 | 3 | d93121272fbb0f12ee0f39c3e01ec943e0fd2a55830c85ebeafbe9e818325123 |
| 2026-08-30T09:02:25.609Z | REL-SNAP-026 | OK | - | 547 | 3 | d93121272fbb0f12ee0f39c3e01ec943e0fd2a55830c85ebeafbe9e818325123 |

## Identity

Record key: mcp.datasetsearch.jp (the normalised endpoint observed)
Registry names (not anchored — no inclusion proof reaches this field): jp.datasetsearch/koekatsu (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: koekatsu (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.