Astronomical Objects Near a Position (SIMBAD)

simbad/cone-search

Astronomical objects SIMBAD lists within a radius of a sky position (right ascension and declination in degrees, ICRS J2000; radius in degrees, 0.0003 to 0.5), nearest first, up to a limit of 100 (default 25): main identifier, position in degrees, object type code, spectral type, V magnitude and the distance from the search centre in degrees. The list is cut at the limit; a crowded field has more objects than are returned. Source: SIMBAD astronomical database, CDS, Strasbourg, ODbL; cite Wenger et al. 2000, A&AS 143, 9. Modified by Eden Engine (fields renamed and reduced). Served by Eden Engine; not an official CDS service.

activeper callv1

Price

$0.0026 per call

You pay the price shown. If a call turns out to cost more than its quote, you pay the actual price, capped at twice the quote. No monthly minimum. Top-ups start at $0.50.

Data source

SIMBAD astronomical database (CDS)

Source: SIMBAD astronomical database, CDS, Strasbourg, France (https://simbad.cds.unistra.fr), licensed under the Open Database Licence (ODbL, https://opendatacommons.org/licenses/odbl/). Please cite: Wenger et al. 2000, A&AS 143, 9 (bibcode 2000A&AS..143....9W). Modified by Eden Engine (fields renamed and reduced). Served by Eden Engine; not an official CDS service.

Use it

Five steps: search, inspect, learn, run, settle. No per-tool setup; your agent reaches this tool through the meta-tools it already has.

Connect once and your AI can find and run this tool, and any other it needs.

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agent

// 1. search: find the tool
omnial_search({ query: "what you need" })

// 2. inspect: price and input schema
omnial_inspect({ tool: "simbad/cone-search" })

// 3. learn: read the usage guide at runtime
omnial_learn({ tool: "simbad/cone-search" })

// 4. run: price the exact call first, then run it
omnial_execute({ tool: "simbad/cone-search", input: { /* see input_schema */ }, dry_run: true })
omnial_execute({ tool: "simbad/cone-search", input: { /* ... */ } })

// 5. settle: the call is charged when it finishes, nothing to do

Not connected yet? Point your MCP client at https://mcp.eden-engine.com/mcp, then copy a config for your client.

Pricing

Every charge this tool can incur.

Charge	Price
Per call	$0.0026

Updated: Oct 27, 2026

Input and output schemas

Input schema

input_schema.json

{
  "type": "object",
  "required": [
    "ra",
    "dec",
    "radius"
  ],
  "properties": {
    "ra": {
      "type": "number",
      "maximum": 360,
      "minimum": 0,
      "description": "Right ascension in degrees (ICRS, J2000), 0 to 360."
    },
    "dec": {
      "type": "number",
      "maximum": 90,
      "minimum": -90,
      "description": "Declination in degrees (ICRS, J2000), -90 to 90."
    },
    "limit": {
      "type": "integer",
      "default": 25,
      "maximum": 100,
      "minimum": 1,
      "description": "Most objects to return, nearest first. 1 to 100, default 25."
    },
    "radius": {
      "type": "number",
      "maximum": 0.5,
      "minimum": 0.0003,
      "description": "Search radius in degrees, 0.0003 (about 1 arcsecond) to 0.5."
    }
  },
  "additionalProperties": false
}

Output schema

output_schema.json

{
  "type": "object",
  "required": [
    "count",
    "objects"
  ],
  "properties": {
    "count": {
      "type": "integer",
      "description": "Objects returned (at most the limit)."
    },
    "objects": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "mainId"
        ],
        "properties": {
          "raDeg": {
            "type": [
              "number",
              "null"
            ],
            "description": "Right ascension in degrees (ICRS, J2000)."
          },
          "decDeg": {
            "type": [
              "number",
              "null"
            ],
            "description": "Declination in degrees (ICRS, J2000)."
          },
          "mainId": {
            "type": [
              "string",
              "null"
            ],
            "description": "SIMBAD main identifier."
          },
          "magnitudeV": {
            "type": [
              "number",
              "null"
            ],
            "description": "V magnitude."
          },
          "objectType": {
            "type": [
              "string",
              "null"
            ],
            "description": "SIMBAD object type code."
          },
          "distanceDeg": {
            "type": [
              "number",
              "null"
            ],
            "description": "Angular distance from the search centre in degrees."
          },
          "spectralType": {
            "type": [
              "string",
              "null"
            ],
            "description": "MK spectral type."
          }
        },
        "additionalProperties": false
      },
      "description": "Objects nearest first."
    }
  },
  "additionalProperties": false
}