mcp-mdn-mcp · by Install
$ agentstack add mcp-mdn-mcp ✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.
Security review
✓ PassedNo issues found. Passed automated security review. · v0.1.0 How review works →
- ✓ Prompt-injection patterns
- ✓ Secret / credential exfiltration
- ✓ Dangerous shell & filesystem operations
- ✓ Untrusted network calls
- ✓ Known-malicious package signatures
What it can access
- ✓ Network access No
- ✓ Filesystem access No
- ✓ Shell / process execution No
- ✓ Environment & secrets No
- ✓ Dynamic code execution No
From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.
Verified badge
Passed review? Show it. Paste this badge into your README, it links to the public security report.
Links to your public security report.[](https://agentstack.voostack.com/security/report/mcp-mdn-mcp) Reliability & compatibility
Declared compatibility
Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.
We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.
How agent discovery & health will work →About
MDN MCP server
This is an experimental MCP server that provides access to MDN's search, documentation, and browser compatibility data.
Our goal is to give LLMs and coding agents a reliable and up-to-date source of web platform documentation - so developers can get accurate information instead of potentially outdated content their LLMs were trained on.
Privacy and data retention
This MCP server is being run as an experiment. While it is an experiment, we will be storing data about the queries we receive. Please see our privacy notice for more information on interaction data we may collect. This data will not be associated with any information designed to identify users. However, while unlikely, it is possible that private information that you divulge to the LLM could be included in these queries. If this is a concern to you, we recommend not using this MCP server.
To opt out of first-party analytics, send the X-Moz-1st-Party-Data-Opt-Out: 1 header along with requests to the MCP.
By using our MCP server, you agree to comply with our Acceptable Use Policy.
As this MCP server is experimental, it may be withdrawn at any time.
Using the remote server
Add the remote server to your tool of choice. For example, in Claude Code:
claude mcp add --transport http mdn https://mcp.mdn.mozilla.net/Using locally
- Install dependencies:
npm install - Start the server:
npm start
Add the server to your tool of choice. For example, in Claude Code:
claude mcp add --transport http mdn-local http://localhost:3002/Local development
- Install dependencies:
npm install - Start the development server, MCP inspector, and tests:
npm run dev
Your browser should automatically open the MCP inspector, and the server will restart when you make changes.
Source & license
This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.
Install and usage instructions live in the source repository linked above.
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Versions
- v0.1.0 Imported from the upstream source.