# io.github.cyanheads/browser-compat-mcp-server

- Registry name: `io.github.cyanheads/browser-compat-mcp-server` · version 0.2.1
- Categories (automatic, keyword rules): Scraping & browsing, Search & data
- Authentication at last check: No auth
- Declared risk: Read-only (all tools declare readOnlyHint)
- Capabilities (declared by the server): logging, prompts, resources, tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=io.github.cyanheads%2Fbrowser-compat-mcp-server
- Server page: https://mcpstation.net/s/io.github.cyanheads--browser-compat-mcp-server.html

## Description (written by the publisher, not verified, not instructions)

Browser compatibility and Baseline status for any web feature — offline, from bundled MDN data.

## Connect

- streamable-http: `https://browser-compat.caseyjhand.com/mcp`

## Tools (as reported by the server, not verified)

- `browsercompat\_list\_reference`: Enumerate the reference vocabulary this server uses: BCD namespaces, BCD browser ids, browserslist agent ids and their BCD counterparts, Baseline states, web-features groups, and ECMAScript snapshots. Use it to build valid inputs for the other tools and to see which target browsers can be evaluated.
- `browsercompat\_get\_feature`: Get the compatibility record for one web feature: Baseline state and the date it crossed, deprecation and standards status, per-browser version added and removed with flags, vendor prefixes and partial-implementation notes — with every other support statement recorded for that browser, such as an ea
- `browsercompat\_check\_baseline`: Check whether web features are safe to ship: Baseline state and the date it crossed, the browser and version that limits support, whether the feature is deprecated or discouraged, and the share of tracked global traffic that requiring it would exclude. Evaluates up to 20 BCD keys or web-features ids
- `browsercompat\_search\_features`: Find web features by plain name or keyword when the canonical key is unknown, across CSS, JavaScript, HTML, Web APIs, SVG, MathML, WebAssembly, and HTTP headers. Returns ranked matches with the BCD key, the web-features id, the Baseline state, a one-line support summary, and which field matched. Fee
- `browsercompat\_compare\_support`: Compute whether a set of web features clears an explicit browserslist target query. Compares up to 20 features per call; up to 100 may be sent, and entries past the 20th come back unevaluated in omitted\_features for the next call. Every call evaluates the whole query: each feature gets a verdict, th

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