LIGO/Virgo/KAGRA gravitational-wave alerts (GraceDB), open data (GWOSC) and GCN follow-up.
Connect Runs on your machine
claude mcp add gracedb-mcp -e GRACEDB_FORCE_NOAUTH=<GRACEDB_FORCE_NOAUTH> -e GRACEDB_SERVICE_URL=<GRACEDB_SERVICE_URL> -e GRACEDB_MCP_DATA_DIR=<GRACEDB_MCP_DATA_DIR> -- uvx gracedb-mcp==0.4.0
{
"mcpServers": {
"gracedb-mcp": {
"command": "uvx",
"args": [
"gracedb-mcp==0.4.0"
],
"env": {
"GRACEDB_FORCE_NOAUTH": "<GRACEDB_FORCE_NOAUTH>",
"GRACEDB_SERVICE_URL": "<GRACEDB_SERVICE_URL>",
"GRACEDB_MCP_DATA_DIR": "<GRACEDB_MCP_DATA_DIR>"
}
}
}
}
{
"mcpServers": {
"gracedb-mcp": {
"command": "uvx",
"args": [
"gracedb-mcp==0.4.0"
],
"env": {
"GRACEDB_FORCE_NOAUTH": "<GRACEDB_FORCE_NOAUTH>",
"GRACEDB_SERVICE_URL": "<GRACEDB_SERVICE_URL>",
"GRACEDB_MCP_DATA_DIR": "<GRACEDB_MCP_DATA_DIR>"
}
}
}
}
{
"servers": {
"gracedb-mcp": {
"type": "stdio",
"command": "uvx",
"args": [
"gracedb-mcp==0.4.0"
],
"env": {
"GRACEDB_FORCE_NOAUTH": "<GRACEDB_FORCE_NOAUTH>",
"GRACEDB_SERVICE_URL": "<GRACEDB_SERVICE_URL>",
"GRACEDB_MCP_DATA_DIR": "<GRACEDB_MCP_DATA_DIR>"
}
}
}
}
Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
GRACEDB_FORCE_NOAUTHOptional | Set to true for anonymous access to public superevents. |
GRACEDB_SERVICE_URLOptional | GraceDB API base URL (production or playground). |
GRACEDB_MCP_DATA_DIROptional | Directory for downloaded files. |
Details
| Package | [email protected] (PYPI, stdio) |
| Package | ghcr.io/izabelamaria24/gracedb-mcp:0.4.0 (OCI, stdio) |
| First published | 2 Nov 2026 |
| Last updated | 2 Nov 2026 |
| Registry name | io.github.izabelamaria24/gracedb-mcp |
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