> 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.xyzzylabs.ai/tc39/mcp

Last observed: 2026-08-30T09:02:01.601Z
Recorded as: OK
Transport: streamable-http
Observations held: 25
Published: yes

## Observations

| Observed | Snapshot | Recorded as | Detail | Latency ms | Tools | Tool schema fingerprint |
|---|---|---|---|---|---|---|
| 2026-08-06T17:47:58.135Z | REL-SNAP-002 | OK | - | 42 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |
| 2026-08-07T08:52:37.895Z | REL-SNAP-003 | OK | - | 58 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |
| 2026-08-08T10:34:27.477Z | REL-SNAP-004 | OK | - | 87 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |
| 2026-08-09T09:15:10.625Z | REL-SNAP-005 | OK | - | 50 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |
| 2026-08-10T09:14:41.516Z | REL-SNAP-006 | OK | - | 66 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |
| 2026-08-11T09:17:17.101Z | REL-SNAP-007 | OK | - | 63 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |
| 2026-08-12T09:15:48.046Z | REL-SNAP-008 | OK | - | 93 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |
| 2026-08-13T09:08:47.028Z | REL-SNAP-009 | OK | - | 40 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |
| 2026-08-14T09:22:13.935Z | REL-SNAP-010 | OK | - | 48 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |
| 2026-08-15T09:12:22.088Z | REL-SNAP-011 | OK | - | 61 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |
| 2026-08-16T09:13:31.191Z | REL-SNAP-012 | OK | - | 103 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |
| 2026-08-17T11:43:24.379Z | REL-SNAP-013 | OK | - | 42 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |
| 2026-08-18T09:11:37.367Z | REL-SNAP-014 | OK | - | 231 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |
| 2026-08-19T08:56:36.390Z | REL-SNAP-015 | OK | - | 75 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |
| 2026-08-20T09:05:02.132Z | REL-SNAP-016 | OK | - | 55 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |
| 2026-08-21T09:20:33.430Z | REL-SNAP-017 | OK | - | 55 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |
| 2026-08-22T08:57:11.242Z | REL-SNAP-018 | OK | - | 65 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |
| 2026-08-23T09:57:55.829Z | REL-SNAP-019 | OK | - | 52 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |
| 2026-08-24T09:00:36.977Z | REL-SNAP-020 | OK | - | 62 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |
| 2026-08-25T09:02:48.905Z | REL-SNAP-021 | OK | - | 58 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |
| 2026-08-26T08:59:03.788Z | REL-SNAP-022 | OK | - | 67 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |
| 2026-08-27T09:12:32.111Z | REL-SNAP-023 | OK | - | 86 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |
| 2026-08-28T09:10:33.878Z | REL-SNAP-024 | OK | - | 59 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |
| 2026-08-29T09:00:12.370Z | REL-SNAP-025 | OK | - | 69 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |
| 2026-08-30T09:02:01.601Z | REL-SNAP-026 | OK | - | 57 | 17 | 49d9e01827dc71f009ea16dd81272df36ba04fd99e7576df88378e96a41a51c8 |

## Identity

Record key: mcp.xyzzylabs.ai/tc39/mcp (the normalised endpoint observed)
Registry names (not anchored — no inclusion proof reaches this field): io.github.xyzzylabs/tc39-mcp (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: tc39-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.