Confirmed Planets of a Host Star (NASA Exoplanet Archive)

nasaexoplanetarchivetap/planets-of-star

The confirmed planets of one host star from the NASA Exoplanet Archive composite planetary-systems table: for each planet its name, discovery year and method, orbital period in days, radius in Earth radii, mass in Earth masses, equilibrium temperature in kelvin, system distance in parsecs and the number of planets in the system. Pass the host star name exactly as the archive writes it, for example TRAPPIST-1 or HD 149026. A star the archive does not list returns an empty list. NASA Exoplanet Archive data, passed through and served by Eden Engine; not an official NASA or Caltech product.

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

NASA Exoplanet Archive

This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. Served by Eden Engine; not an official NASA or Caltech product.

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.

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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: "nasaexoplanetarchivetap/planets-of-star" })

// 3. learn: read the usage guide at runtime
omnial_learn({ tool: "nasaexoplanetarchivetap/planets-of-star" })

// 4. run: price the exact call first, then run it
omnial_execute({ tool: "nasaexoplanetarchivetap/planets-of-star", input: { /* see input_schema */ }, dry_run: true })
omnial_execute({ tool: "nasaexoplanetarchivetap/planets-of-star", 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 24, 2026

Input and output schemas

Input schema

input_schema.json

{
  "type": "object",
  "required": [
    "hostname"
  ],
  "properties": {
    "hostname": {
      "type": "string",
      "pattern": "^[A-Za-z0-9][A-Za-z0-9 .+_-]{0,39}$",
      "description": "Host star name exactly as the archive spells it (case sensitive), for example TRAPPIST-1, Kepler-90 or HD 149026."
    }
  },
  "additionalProperties": false
}

Output schema

output_schema.json

{
  "type": "object",
  "required": [
    "rowCount",
    "rows"
  ],
  "properties": {
    "rows": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "pl_eqt": {
            "type": [
              "number",
              "null"
            ],
            "description": "Equilibrium temperature, kelvin."
          },
          "pl_name": {
            "type": "string",
            "description": "Planet name."
          },
          "pl_rade": {
            "type": [
              "number",
              "null"
            ],
            "description": "Planet radius, Earth radii."
          },
          "sy_dist": {
            "type": [
              "number",
              "null"
            ],
            "description": "Distance to the system, parsecs."
          },
          "sy_pnum": {
            "type": [
              "integer",
              "null"
            ],
            "description": "Number of planets in the system."
          },
          "hostname": {
            "type": [
              "string",
              "null"
            ],
            "description": "Host star name."
          },
          "pl_masse": {
            "type": [
              "number",
              "null"
            ],
            "description": "Planet mass or minimum mass, Earth masses."
          },
          "disc_year": {
            "type": [
              "integer",
              "null"
            ]
          },
          "pl_orbper": {
            "type": [
              "number",
              "null"
            ],
            "description": "Orbital period, days."
          },
          "discoverymethod": {
            "type": [
              "string",
              "null"
            ]
          }
        },
        "additionalProperties": true
      },
      "description": "One object per row, exactly as the archive sends it (nulls included)."
    },
    "rowCount": {
      "type": "integer",
      "description": "The number of rows returned."
    }
  },
  "description": "The confirmed planets of the star.",
  "additionalProperties": true
}