How do I install tc39-mcp?

Pick a client above and copy the generated config. Cursor and VS Code also have a deep link when the server can run locally or remotely.

Is tc39-mcp official?

No. Registry-listed is not the same as vendor-official. Read the methodology for the difference.

This listing scores 55 (Fair). The formula is published on the methodology page.

tc39-mcp MCP Server — Install for Claude, Cursor & VS Code | MCPpedia

Name: tc39-mcp MCP Server
Author: xyzzylabs

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

RegistryRemotexyzzylabs

55Fair

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "xyzzylabs-tc39-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "tc39-mcp@0.6.4"
      ]
    }
  }
}

77Good

MCP server for Firecrawl — web search, scraping, and biomedical/arXiv paper search.

RegistryRemotefirecrawl7.6K stars