Vizier
live UtilityVizieR MCP — CDS astronomical catalogue access.
4 tools
0ms auth
free tier 50 calls/day
Tools
catalogs Search VizieR catalogue metadata.
No parameters required.
Try it
Response
query_catalog Query rows of a single catalogue (e.g. "I/345/gaia2").
No parameters required.
Try it
Response
cone_search Cone search around (RA, Dec).
No parameters required.
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Response
object Query by object name (resolved via SIMBAD/NED).
No parameters required.
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Response
Test with curl
The gateway speaks JSON-RPC 2.0 over HTTP POST. You can test any pack directly from the terminal.
List available tools
bash
curl -X POST https://gateway.pipeworx.io/vizier/mcp \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'Call a tool
bash
curl -X POST https://gateway.pipeworx.io/vizier/mcp \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"catalogs","arguments":{}}}'Use with the SDK
Install @pipeworx/sdk to call tools from any TypeScript/Node project.
TypeScript
import { Pipeworx } from '@pipeworx/sdk';
const px = new Pipeworx();
const result = await px.call("catalogs", {}); ask_pipeworx
// Or ask in plain English:
const answer = await px.ask("vizier mcp — cds astronomical catalogue access");