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

up checked 2026-11-11T05:38:05.525Z

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Publisher-provided description

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

Summary by lookupd

Lets an agent check Baseline status, browser support versions, and deprecation for web features offline from bundled MDN data.

Install

Claude Code, remote (streamable-http)

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

Claude Code, npm package (stdio)

claude mcp add browser-compat-mcp-server -- npx -y @cyanheads/browser-compat-mcp-server

Claude Code, npm package (stdio)

claude mcp add browser-compat-mcp-server -- npx -y @cyanheads/browser-compat-mcp-server

Codex, remote (streamable-http)

codex mcp add browser-compat-mcp-server --url https://browser-compat.caseyjhand.com/mcp

Codex, npm package (stdio)

codex mcp add browser-compat-mcp-server -- npx -y @cyanheads/browser-compat-mcp-server

Codex, npm package (stdio)

codex mcp add browser-compat-mcp-server -- npx -y @cyanheads/browser-compat-mcp-server

Cursor, remote (streamable-http) → .cursor/mcp.json

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

Cursor, npm package (stdio) → .cursor/mcp.json

{
  "mcpServers": {
    "browser-compat-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/browser-compat-mcp-server"
      ]
    }
  }
}

Cursor, npm package (stdio) → .cursor/mcp.json

{
  "mcpServers": {
    "browser-compat-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/browser-compat-mcp-server"
      ]
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (5 tools)

Publisher-provided text

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-fe
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 remove
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 depreca
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
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

Changes

Newest first, as lookupd saw them

2026-11-11: version 0.3.0 → 0.3.1

Details

Version: 0.3.1
Transports: streamable-http, stdio
Uptime (7 days): 100%
Median latency: 696 ms
First indexed: 2026-11-01T09:25:47.071Z
Last seen in registry: 2026-11-11T11:17:24.544Z
Repository: https://github.com/cyanheads/browser-compat-mcp-server.git

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62092 servers
Last crawl: 2026-11-11T17:38:11.606Z
API base: https://api.lookupd.com
MCP URL: https://api.lookupd.com/mcp