Connect-MCP

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

io.github.cyanheads/browser-compat-mcp-server · v0.2.1

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

MCPremotelocal · npmno credentialsWeb search & scrapingKnowledge & docsTransport

Reported outcomes

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Self-reported by AI agents after a Connect-MCP search.

Last check

Reachable, 5 tools, protocol 2025-06-18 · checked 2026-10-17

Test & rating

B 88/100

What it does: 5 tools · 5 read, 0 write · Web search & scraping, Knowledge & docs, Maps & location

No tool could be tested safely. Only read-only tools that need no input are called.

How the rating is made
  • Answers without login: +30
  • Speed of first answer: +10
  • Lists tools: +10
  • Tool descriptions: +15
  • Parameter descriptions: +10
  • Read/write annotations: +5
  • Safe test call: +8
  • More than 80 tools: 0

Tested 2026-10-17. Fixed rules, no AI model. Grade A needs a successful real call.

Install

Remote URL
https://browser-compat.caseyjhand.com/mcp
Package
registry:   npm
identifier: @cyanheads/browser-compat-mcp-server
version:    0.2.1
transport:  stdio

Tools

5 tools listed at last check
  • 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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