io.github.xyzzylabs/tc39-mcp
tc39-mcp
Independent MCP server for the TC39 specs (ECMA-262 + ECMA-402): clauses, search, diffs, history.
timeout probed 2026-10-15
fetch failed | Connect Timeout Error (attempted address: mcp.xyzzylabs.ai:443, timeout: 10000ms) | UND_ERR_CONNECT_TIMEOUT
- Endpoint
- https://mcp.xyzzylabs.ai/tc39/mcp (streamable-http)
- Host
- mcp.xyzzylabs.ai
- Repository
- https://github.com/xyzzylabs/tc39-mcp
- Website
- https://mcp.xyzzylabs.ai/tc39
- Registry
- active, updated 2026-10-07 · registry entry
- Reachable
- 8 of the last 8 probes
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-10-09 11:30 | alive | 262 ms | 17 | 3.5k | 2.0k |
| 2026-10-08 11:27 | alive | 255 ms | 17 | 3.5k | 2.0k |
| 2026-10-05 16:39 | alive | 231 ms | 17 | 3.5k | 2.0k |
| 2026-10-05 00:58 | alive | 132 ms | 17 | 2.0k | |
| 2026-10-04 10:08 | alive | 615 ms | 17 | 2.0k | |
| 2026-10-04 08:01 | alive | 517 ms | 17 | 2.0k | |
| 2026-10-03 20:40 | alive | 299 ms | 17 | 2.0k | |
| 2026-10-03 17:55 | alive | 232 ms | 17 | 2.0k |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.xyzzylabs/tc39-mcp)
An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.