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

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

Measured by MCP Station

Last check	Reachable
Checked at	—
Check success 7 / 30 days	—
First-try success 30 days	—
Median response	—
Lookups 30 days	—
Authentication	No auth
MCP version	2025-06-18
Rank score	—
Declared risk	Read-only (all tools declare readOnlyHint)
Capabilities declared	logging, prompts, resources, tools
Tool definitions	5 tools · with description 100% · input schema is an object 100% · read/destructive hints 100%

Description written by the publisher, not verified

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

Connect

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

claude mcp add --transport http browser-compat-mcp-server https://browser-compat.caseyjhand.com/mcp

{
  "mcpServers": {
    "browser-compat-mcp-server": {
      "url": "https://browser-compat.caseyjhand.com/mcp"
    }
  }
}

Tools as reported by the server

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

Repository · JSON · Text for agents · Registry updated 2026-10-15