io.github.cyanheads/browser-compat-mcp-server
browser-compat-mcp-server
Browser compatibility and Baseline status for any web feature — offline, from bundled MDN data.
alive probed 2026-10-05 · HTTP 200
5tools
3.5ktokens in Claude Opus 5.5
3.6ktokens in Claude Code
1.8 %of a 200k context window
2.1ko200k_base estimate
332 msto initialize
105 msto list tools
- Endpoint
- https://browser-compat.caseyjhand.com/mcp (streamable-http)
- Host
- browser-compat.caseyjhand.com
- Protocol
- 2025-11-25
- Reports itself as
- browser-compat-mcp-server 0.2.0
- Capabilities
- logging, prompts, resources, tools
- Instructions
- 1 444 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-05. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/cyanheads/browser-compat-mcp-server.git
- Registry
- active, updated 2026-09-30 · registry entry
- Reachable
- 6 of the last 6 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| browsercompat_compare_support | 669 | 31 % |
| browsercompat_search_features | 474 | 22 % |
| browsercompat_get_feature | 435 | 20 % |
| browsercompat_check_baseline | 333 | 16 % |
| browsercompat_list_reference | 228 | 11 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-10-05 14:38 | alive | 332 ms | 5 | 3.5k | 2.1k |
| 2026-10-05 00:33 | alive | 232 ms | 5 | 2.1k | |
| 2026-10-04 10:04 | alive | 984 ms | 5 | 2.1k | |
| 2026-10-04 07:57 | alive | 664 ms | 5 | 2.1k | |
| 2026-10-03 20:37 | alive | 1.2 s | 5 | 2.1k | |
| 2026-10-03 17:53 | alive | 558 ms | 5 | 2.1k |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.cyanheads/browser-compat-mcp-server)
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.