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NASA Exoplanets – Planet Habitability Screen
x402
NASA Exoplanets – Planet Habitability Screen is a paid API for AI agents from exoplanets-nasa.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-30).
Checks whether a named exoplanet falls within its star's habitable zone and assesses its size class and rocky-planet plausibility.
Price / call$0.02
Success—
StatusUnknown
How this service works
Habitable-zone screen for a named exoplanet: orbit versus the zone edges, size class and rocky-planet plausibility.
Output
Returns a verdict (e.g. 'inside habitable zone', 'too hot', 'too cold'), the planet's orbital distance in AU compared to the habitable zone edges (Kopparapu 2013 method), size class (e.g. super-Earth, sub-Neptune), rocky-planet plausibility, mass and radius in Earth units, equilibrium temperature estimates, insolation ratio relative to Earth, host star name, data source URL, and a list of reasons supporting the verdict. May also flag if the data is degraded or the classification is controversial.
Example use cases
Habitability check for a candidate exoplanet
“I'm researching potentially habitable worlds — can you tell me whether Kepler-442 b falls within its star's habitable zone and what size class it is?”
Rocky-planet plausibility for a science project
“For my astronomy class I need to know if Proxima Centauri b is likely a rocky planet and whether its orbit puts it in the habitable zone — can you pull that up?”
Comparing habitable zone position for a blog post
“I'm writing about promising exoplanets — what's the habitable zone verdict for LHS 1140 b, and is its orbit inside, outside, or right within the zone edges?”
Technical details
Endpoint
GEThttps://exoplanets-nasa.x402tookit.com/planet-habitability?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, structured habitability verdict for a specific named exoplanet — including its orbital position relative to habitable zone edges, size class, and rocky-planet plausibility — without needing to supply stellar parameters yourself. Prefer this over raw archive queries when you want a pre-computed, human-readable summary with reasons.
Side effects
- Planet name not found in NASA archive — returns null or empty fields
- Ambiguous planet name yields no match
- Missing orbital or stellar data causes degraded output with notChecked fields populated
- API returns null for key fields if NASA archive lacks radius or mass data for the planet
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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