tc39-mcp is an MCP (Model Context Protocol) server by xyzzylabs in the Search category. MCP server for the TC39 specs (ECMA-262 + ECMA-402): SHA-pinned clauses, search, diffs, history.

How do I connect tc39-mcp to Claude, Cursor, or another MCP client?

tc39-mcp is a remote MCP server — add its endpoint (https://tc39-mcp.chicoxyzzy.workers.dev/mcp) to your client's MCP configuration (for example with "claude mcp add", or under "mcpServers" in Cursor's mcp.json) and restart the client.

Is tc39-mcp open source?

Yes — the source code is public at github.com/xyzzylabs/tc39-mcp, with 2 GitHub stars.

Can AI agents pay to use tc39-mcp?

Not yet through Loomal — tc39-mcp is listed as a free directory entry. If its maintainer verifies ownership, they can set per-call USDC pricing that agents pay over x402, with settlement on Base.

tc39-mcp

MCP server by github.com/xyzzylabs/tc39-mcp

MCP server for the TC39 specs (ECMA-262 + ECMA-402): SHA-pinned clauses, search, diffs, history.

2 starsnpm: tc39-mcpRemote-capable

About tc39-mcp

tc39-mcp is an MCP (Model Context Protocol) server published by xyzzylabs in the official MCP registry, listed under Search on Loomal. MCP server for the TC39 specs (ECMA-262 + ECMA-402): SHA-pinned clauses, search, diffs, history.

tc39-mcp runs as a hosted remote over streamable-http — MCP clients connect directly to its endpoint, with nothing to install locally. It also ships as an npm package (tc39-mcp), so any MCP client that can launch a local process can run it.

Development happens in the open at github.com/xyzzylabs/tc39-mcp, where the project has earned 2 GitHub stars.

Use tc39-mcp with your agent

Claude Code · one command

claude mcp add --transport http tc39-mcp https://tc39-mcp.chicoxyzzy.workers.dev/mcp

Claude Desktop, Cursor & other MCP clients · config

{
  "mcpServers": {
    "tc39-mcp": {
      "url": "https://tc39-mcp.chicoxyzzy.workers.dev/mcp"
    }
  }
}

streamable-httphttps://tc39-mcp.chicoxyzzy.workers.dev/mcp

npmtc39-mcp

Frequently asked questions

What is tc39-mcp?: tc39-mcp is an MCP (Model Context Protocol) server by xyzzylabs in the Search category. MCP server for the TC39 specs (ECMA-262 + ECMA-402): SHA-pinned clauses, search, diffs, history.
How do I connect tc39-mcp to Claude, Cursor, or another MCP client?: tc39-mcp is a remote MCP server — add its endpoint (https://tc39-mcp.chicoxyzzy.workers.dev/mcp) to your client's MCP configuration (for example with "claude mcp add", or under "mcpServers" in Cursor's mcp.json) and restart the client.
Is tc39-mcp open source?: Yes — the source code is public at github.com/xyzzylabs/tc39-mcp, with 2 GitHub stars.
Can AI agents pay to use tc39-mcp?: Not yet through Loomal — tc39-mcp is listed as a free directory entry. If its maintainer verifies ownership, they can set per-call USDC pricing that agents pay over x402, with settlement on Base.

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Listing data from the official MCP registry and GitHub, refreshed periodically. Not affiliated with the maintainer unless claimed. Maintain tc39-mcp? Claim this listing free by verifying GitHub ownership, or contact us.