GraceDB

io.github.izabelamaria24/gracedb-mcp

LIGO/Virgo/KAGRA gravitational-wave alerts (GraceDB), open data (GWOSC) and GCN follow-up.

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Connect this server

Add this to your MCP client config — claude_desktop_config.json (Claude Desktop) or .cursor/mcp.json (Cursor).Suits: Claude Desktop · Cursor.

{
  "mcpServers": {
    "gracedb-mcp": {
      "command": "uvx",
      "args": [
        "gracedb-mcp"
      ],
      "env": {
        "GRACEDB_FORCE_NOAUTH": "true",
        "GRACEDB_SERVICE_URL": "https://gracedb.ligo.org/api/",
        "GRACEDB_MCP_DATA_DIR": "~/.cache/gracedb-mcp"
      }
    }
  }
}
Environment variables
  • GRACEDB_FORCE_NOAUTHSet to true for anonymous access to public superevents.
  • GRACEDB_SERVICE_URLGraceDB API base URL (production or playground).
  • GRACEDB_MCP_DATA_DIRDirectory for downloaded files.

A starting point — check the repository for exact arguments and setup. Restart your client after editing the config.

Category
Developer Tools
Version
0.4.0
Registry
active
Published
11/2/2026

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Add the badge to your site

Show visitors that GraceDB is listed here — it’s also the link we check for a free listing.

GraceDB — listed on Serverdex

HTML — for your website

<a href="https://serverdex.io/server/io-github-izabelamaria24-gracedb-mcp?utm_source=badge"><img src="https://serverdex.io/brand/badge.svg" alt="GraceDB — listed on Serverdex" width="123" height="40" loading="lazy"></a>

Recommended. A dofollow link from your own domain is the one that counts for search engines, and it's the link we check for a free listing.

Markdown — for your README

[![GraceDB — listed on Serverdex](https://serverdex.io/brand/badge.svg)](https://serverdex.io/server/io-github-izabelamaria24-gracedb-mcp?utm_source=badge)

Nice for visibility, but GitHub marks README links nofollow, so it doesn't pass authority. Use the HTML badge on your site as well.