Who it is for
Web developers checking API behaviour or browser support while writing code.
Overview
What MDN does
MDN is Mozilla's reference for the web platform, and the Browser Compatibility Data project underneath it records which browser versions support which feature. This connector, published by Mozilla, exposes both: search over the documentation, retrieval of a page as markdown, and direct queries against the compatibility tables.
That last part is the one worth having. Compatibility answers are exactly where a model's training data goes stale, and the connector returns the current record instead of a remembered one. The endpoint listed its three tools without credentials, matching the published count. Mozilla ships it at the community tier despite being the source of the underlying data.
Tool surface
Three tools, search, get-doc, and get-compat, forming a plain retrieval loop: find a page, read it as markdown, or pull the compatibility record for a feature directly.
Availability
Where MDN is listed
MDN is listed in the Claude connectors directory only. Mozilla has no app under the same domain in the ChatGPT directory; 392 of the 3,150 products here are on both marketplaces, and this is not one of them.
The MCP server behind a Claude connector is usually the same server a ChatGPT app would need, so the absence is a distribution decision rather than a technical one.
Claude listing
In the Claude connectors directory
MDN publishes 3 tools to Claude, a deliberately narrow surface; only 11.3% of the 1,253 Claude-listed connectors expose fewer.
The median Claude-listed connector filed under Developer Tools publishes 13, so this one sits 10 tools below its bucket's median, 76th of 95.
It falls in the 1-3 tools band, which holds 16.4% of the Claude directory.
Measured against the live endpoint
A direct call to the endpoint returned 3 tools, matching the 3 the listing publishes. Probed 2026-08-07.
Tools the server actually returns
get-compatget-docsearch
MDN publishes a remote MCP endpoint. Claude connects to it over HTTP; there is nothing to install locally.
Every connector in the Claude directory is remote, all 1,253 of them, so transport is not a differentiator there.
- Publisher
- Mozilla
- Verification
- Community-listed (61.5% of the Claude directory)
- Filed under
- Developer Tools
- Endpoint
-
https://mcp.mdn.mozilla.net/ - Documentation
- Publisher setup docs
- Published tools
- 3 · 1-3 tools band
- Depth rank in Developer Tools
- 76 of 95
- Snapshot
- August 2026
MDN is community-listed in the Claude directory, the tier 770 of 1,253 connectors sit in (61.5%). It is the default for a self-published server, and says nothing either way about quality.
In the publisher's words
How Mozilla describes it
Official MDN Claude Connector: provides up-to-date search and retrieval of MDN’s web platform documentation and Browser Compatibility Data.
Quoted from the connector's own Claude directory listing as captured in August 2026. Node8 did not write it and does not vouch for it.
Nearby
Other Developer Tools connectors
Devart Learn
Search Devart product documentation from an agent
Claude
Exa
Real-time web search and page reading
Claude · ChatGPT
GraphOS MCP Tools
Apollo docs, connector specs, and GraphOS graph telemetry
Claude
Metaplay SDK Docs
Search Metaplay SDK documentation and source files
ChatGPT
Microsoft Learn
Official Microsoft and Azure documentation search and retrieval
Claude
pg-aiguide
Postgres and TimescaleDB documentation with authoring skills
Claude
This is an independent catalogue entry compiled by Node8 from MDN's public marketplace listing as it stood in August 2026. Listing facts come from the marketplaces; the comparisons against the rest of the directory and any live-endpoint measurements are Node8's. Node8 is not affiliated with Mozilla, and inclusion here is not an endorsement.
Want your company reachable inside ChatGPT and Claude?
Node8 builds MCP servers end to end: deciding which tools are worth exposing, the authentication and permission model, the review submissions, and the onboarding that gets them used. One server serves ChatGPT, Claude, and Microsoft Copilot.