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NASA Exoplanet Archive Search
x402
NASA Exoplanet Archive Search is a paid API for AI agents from 2s.io, paid per call via x402, $0.00144/call, status unknown (last checked 2026-09-14).
Search and filter confirmed exoplanets from the NASA Exoplanet Archive (~6,000 planets, updated weekly) with detailed orbital, physical, and stellar parameters
Price / call$0.00144
Success—
StatusUnknown
How this service works
Search confirmed exoplanets in the NASA Exoplanet Archive (~6,000, updated weekly — past any LLM training cutoff). Filter by name (planet, partial), hostStar (partial), discoveryYear, or method (e.g. "Transit", "Radial Velocity", "Microlensing"). Each planet: name, host star + how many stars/planets in the system, discovery method/year/facility, orbital period, semi-major axis, radius (Earth radii), mass (Earth masses), equilibrium temperature, insolation; host-star spectral type/temperature/radius/mass; distance in parsecs + light-years; and RA/dec. Astronomy, habitability research, science education. Public-domain NASA data.
Output
A list of confirmed exoplanet records (up to 100 per call) each containing: planet name, host star name, number of stars and planets in the system, discovery method, discovery year and facility, orbital period, semi-major axis, planet radius in Earth radii, planet mass in Earth masses, equilibrium temperature, insolation flux, host star spectral type/temperature/radius/mass, and the system's distance in both parsecs and light-years plus RA/dec coordinates.
Example use cases
Example prompt
“Can you pull up all confirmed exoplanets discovered via the Transit method around TRAPPIST-1, with their orbital periods, radii, equilibrium temperatures, and distance from Earth?”
Technical details
Endpoint
GEThttps://2s.io/api/space/exoplanetWhen to prefer
Use this endpoint when you need up-to-date confirmed exoplanet data beyond any LLM training cutoff, especially for filtering by discovery method, host star, or year; when you need detailed physical parameters (radius, mass, temperature, insolation) for habitability analysis; or when RA/dec coordinates and stellar properties are required for astronomy or science education tasks.
Side effects
- No matching planets found for the given filters — returns empty result set
- Invalid discoveryYear outside range 1989–2030 — schema validation error
- Limit parameter outside 1–100 — schema validation error
- Partial name or hostStar string with no matches — empty results
- Network or upstream NASA Archive unavailability — service error
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"name": "Kepler-22",
"limit": 10,
"method": "Transit"
}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
{
"data": {
"ok": true,
"meta": {
"query": {
"name": "Kepler-22",
"limit": 10,
"method": "Transit",
"hostStar": null,
"discoveryYear": null
}
},
"items": [
{
"ra": 287.9060885,
"dec": 46.9377479,
"name": "Kepler-222 c",
"star": {
"massSolar": null,
"radiusSolar": 0.869,
"spectralType": null,
"effectiveTempK": 5433
},
"hostStar": "Kepler-222",
"massEarth": null,
"radiusEarth": 4.64,
"discoveryYear": 2014,
"starsInSystem": 1,
"discoveryMethod": "Transit",
"distanceParsecs": 758.854,
"insolationEarth": null,
"planetsInSystem": 3,
"semiMajorAxisAu": 0.091,
"equilibriumTempK": null,
"discoveryFacility": "Kepler",
"orbitalPeriodDays": 10.08881,
"distanceLightYears": 2475.05
},
{
"ra": 287.9060885,
"dec": 46.9377479,
"name": "Kepler-222 d",
"star": {
"massSolar": null,
"radiusSolar": 0.869,
"spectralType": null,
"effectiveTempK": 5433
},
"hostStar": "Kepler-222",
"massEarth": null,
"radiusEarth": 3.69,
"discoveryYear": 2014,
"starsInSystem": 1,
"discoveryMethod": "Transit",
"distanceParsecs": 758.854,
"insolationEarth": null,
"planetsInSystem": 3,
"semiMajorAxisAu": 0.18,
"equilibriumTempK": null,
"discoveryFacility": "Kepler",
"orbitalPeriodDays": 28.081912,
"distanceLightYears": 2475.05
},
{
"ra": 298.3183909,
"dec": 47.2794824,
"name": "Kepler-223 b",
"star": {
"massSolar": 1.125,
"radiusSolar": 1.72,
"spectralType": null,
"effectiveTempK": null
},
"hostStar": "Kepler-223",
"massEarth": 7.4,
"radiusEarth": 2.99,
"discoveryYear": 2014,
"starsInSystem": 1,
"discoveryMethod": "Transit",
"distanceParsecs": 1859.71,
"insolationEarth": null,
"planetsInSystem": 4,
"semiMajorAxisAu": null,
"equilibriumTempK": null,
"discoveryFacility": "Kepler",
"orbitalPeriodDays": 7.38449,
"distanceLightYears": 6065.56
},
{
"ra": 298.3183909,
"dec": 47.2794824,
"name": "Kepler-223 c",
"star": {
"massSolar": 1.125,
"radiusSolar": 1.72,
"spectralType": null,
"effectiveTempK": null
},
"hostStar": "Kepler-223",
"massEarth": 5.1,
"radiusEarth": 3.44,
"discoveryYear": 2014,
"starsInSystem": 1,
"discoveryMethod": "Transit",
"distanceParsecs": 1859.71,
"insolationEarth": null,
"planetsInSystem": 4,
"semiMajorAxisAu": null,
"equilibriumTempK": null,
"discoveryFacility": "Kepler",
"orbitalPeriodDays": 9.84564,
"distanceLightYears": 6065.56
},
{
"ra": 290.9342679,
"dec": 47.3575414,
"name": "Kepler-224 d",
"star": {
"massSolar": null,
"radiusSolar": 0.676,
"spectralType": null,
"effectiveTempK": 5018
},
"hostStar": "Kepler-224",
"massEarth": null,
"radiusEarth": 2.3,
"discoveryYear": 2014,
"starsInSystem": 1,
"discoveryMethod": "Transit",
"distanceParsecs": 782.088,
"insolationEarth": null,
"planetsInSystem": 4,
"semiMajorAxisAu": 0.089,
"equilibriumTempK": null,
"discoveryFacility": "Kepler",
"orbitalPeriodDays": 11.349393,
"distanceLightYears": 2550.83
},
{
"ra": 292.1939846,
"dec": 47.4570808,
"name": "Kepler-225 b",
"star": {
"massSolar": null,
"radiusSolar": 0.48,
"spectralType": null,
"effectiveTempK": 3682
},
"hostStar": "Kepler-225",
"massEarth": null,
"radiusEarth": 1.2,
"discoveryYear": 2014,
"starsInSystem": 1,
"discoveryMethod": "Transit",
"distanceParsecs": 561.101,
"insolationEarth": null,
"planetsInSystem": 2,
"semiMajorAxisAu": 0.056,
"equilibriumTempK": null,
"discoveryFacility": "Kepler",
"orbitalPeriodDays": 6.738975,
"distanceLightYears": 1830.06
},
{
"ra": 292.3760942,
"dec": 47.8809596,
"name": "Kepler-226 b",
"star": {
"massSolar": null,
"radiusSolar": 0.802,
"spectralType": null,
"effectiveTempK": 5571
},
"hostStar": "Kepler-226",
"massEarth": null,
"radiusEarth": 1.55,
"discoveryYear": 2014,
"starsInSystem": 1,
"discoveryMethod": "Transit",
"distanceParsecs": 980.138,
"insolationEarth": null,
"planetsInSystem": 3,
"semiMajorAxisAu": 0.047,
"equilibriumTempK": null,
"discoveryFacility": "Kepler",
"orbitalPeriodDays": 3.940997,
"distanceLightYears": 3196.78
},
{
"ra": 291.9342748,
"dec": 48.141676,
"name": "Kepler-227 c",
"star": {
"massSolar": null,
"radiusSolar": 1.091,
"spectralType": null,
"effectiveTempK": 5854
},
"hostStar": "Kepler-227",
"massEarth": null,
"radiusEarth": 3.04,
"discoveryYear": 2014,
"starsInSystem": 1,
"discoveryMethod": "Transit",
"distanceParsecs": 1083.06,
"insolationEarth": null,
"planetsInSystem": 2,
"semiMajorAxisAu": 0.29,
"equilibriumTempK": null,
"discoveryFacility": "Kepler",
"orbitalPeriodDays": 54.418694,
"distanceLightYears": 3532.47
},
{
"ra": 296.2860853,
"dec": 48.2246328,
"name": "Kepler-228 c",
"star": {
"massSolar": null,
"radiusSolar": 1.014,
"spectralType": null,
"effectiveTempK": 6043
},
"hostStar": "Kepler-228",
"massEarth": null,
"radiusEarth": 2.7,
"discoveryYear": 2014,
"starsInSystem": 1,
"discoveryMethod": "Transit",
"distanceParsecs": 1644.61,
"insolationEarth": null,
"planetsInSystem": 3,
"semiMajorAxisAu": 0.052,
"equilibriumTempK": null,
"discoveryFacility": "Kepler",
"orbitalPeriodDays": 4.134444,
"distanceLightYears": 5363.99
},
{
"ra": 286.9994758,
"dec": 48.3757867,
"name": "Kepler-229 b",
"star": {
"massSolar": null,
"radiusSolar": 0.728,
"spectralType": null,
"effectiveTempK": 5120
},
"hostStar": "Kepler-229",
"massEarth": null,
"radiusEarth": 2.2,
"discoveryYear": 2014,
"starsInSystem": 1,
"discoveryMethod": "Transit",
"distanceParsecs": 826.265,
"insolationEarth": null,
"planetsInSystem": 3,
"semiMajorAxisAu": 0.062,
"equilibriumTempK": null,
"discoveryFacility": "Kepler",
"orbitalPeriodDays": 6.252972,
"distanceLightYears": 2694.91
}
],
"total": null,
"source": {
"url": "https://exoplanetarchive.ipac.caltech.edu/",
"license": "Public domain (NASA Exoplanet Science Institute / Caltech).",
"provider": "NASA Exoplanet Archive (Planetary Systems table)"
}
},
"meta": {
"cost": {
"usd": 0.00144,
"tier": 0
},
"caller": "x402",
"version": null,
"endpoint": "space.exoplanet",
"settlement": {
"txHash": "0x976fe5805092c9f9d36743ada1708ec64dcca0ea71a6a6f302b534d005959d44",
"network": "eip155:8453",
"success": true
}
}
}Tags
x402
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