// SCAN REPORT

Web Compat

7 tools. 0 can modify or destroy data without limits.

Read-only server. Low risk, but rate limits prevent runaway API costs.

Last updated: 30 Jun 2026

0 can modify or destroy data

7 read-only

7 tools total

Community server · catalogue entry verified 30/06/2026

How to control Web Compat ↓

TOOL MAP

What Web Compat exposes to your agents

Read (7) Write / Execute (0) Destructive / Financial (0)

Running more than one server? Check your whole stack →

THE RISK

What can go wrong

Even read-only tools carry cost. An agent in a retry loop can make thousands of API calls per minute, exhausting rate limits and running up bills.

POLICY

How to control Web Compat

PolicyLayer is an MCP gateway — it sits between your AI agents and Web Compat, and nothing reaches the server without passing your rules. These are the rules we recommend:

Cap read operations

{
  "compat_check": {
    "limits": [
      {
        "counter": "compat_check_per_minute",
        "window": "minute",
        "max": 60,
        "scope": "grant"
      }
    ]
  }
}

Controls API costs and prevents retry loops from exhausting upstream rate limits.

Create a free account and register Web Compat — nothing to install.
Add these rules — paste them, or build them visually. Tune the limits to your setup.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

ENFORCE POLICY ON WEB COMPAT →

Instant setup, no code required.

FULL CATALOGUE

All 7 Web Compat tools

READ 7 tools

Read compat_check Check browser compatibility for a specific web platform feature using MDN Browser Compat Data (BCD). Returns Read compat_check_support Find web platform features that were added in a specific browser version. Useful for understanding what new c Read compat_compare Compare browser compatibility across multiple web platform features side by side. Useful for choosing between Read compat_get_baseline Get the Baseline status for a web platform feature from W3C WebDX web-features data. Baseline indicates wheth Read compat_list_baseline List web platform features filtered by their Baseline status. Use this to discover which features are Widely Read compat_list_browsers List all browsers tracked in MDN Browser Compat Data with their current versions and release dates. Args: - Read compat_search Search BCD (Browser Compat Data) features by keyword. Use this to find the correct BCD identifier for compat_c

FAQ

Questions about Web Compat

Is the Web Compat MCP server safe to use without restrictions? +

The Web Compat server is primarily read-only with 7 read tools. While it cannot modify data, an agent in a retry loop can make thousands of API calls per minute, exhausting rate limits and running up costs. Rate limiting is still recommended.

How many tools does the Web Compat MCP server expose? +

7 tools across 1 categories: Read. 7 are read-only. 0 can modify, create, or delete data.

How do I enforce a policy on Web Compat? +

Register the Web Compat MCP server in PolicyLayer, apply the suggested rules above (adjust the limits to your use case), and point your AI client at the PolicyLayer proxy URL instead of the server directly. Your agents keep the same tools; PolicyLayer evaluates every call against policy before it executes. Nothing to install, live in minutes.

Enforce policy on every Web Compat tool call.

Deterministic rules across all 7 Web Compat tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

ENFORCE POLICY ON WEB COMPAT →

Instant setup, no code required.

7 Web Compat tools catalogued and risk-classified — across an index of 43,000+ MCP servers.