Other & General Hosted remote
tc39-mcp
Independent MCP server for the TC39 specs (ECMA-262 + ECMA-402): clauses, search, diffs, history.
Install
Remote streamable-http
https://mcp.xyzzylabs.ai/tc39/mcpnpmstdio
npx -y tc39-mcp Client config (Claude Desktop, Cursor, Windsurf and most MCP clients)
{
"mcpServers": {
"io-github-xyzzylabs-tc39-mcp": {
"url": "https://mcp.xyzzylabs.ai/tc39/mcp"
}
}
}Source: official MCP Registry record · registry name io.github.xyzzylabs/tc39-mcp · published 2026-09-08 · updated 2026-09-08. Not an endorsement; review the code before connecting it to anything sensitive.