NASA & Space APIs
Space APIs cover imagery, launches and orbital data. NASA Open APIs is the agency's own gateway to the astronomy picture of the day, Mars rover photos and asteroid data, Launch Library 2 tracks past and upcoming rocket launches without a key, and Solar System OpenData supplies physical data on planets and moons. CelesTrak and TLE serve orbital elements for satellites.
| API | Pricing | Auth | Format | Free tier | Status |
|---|---|---|---|---|---|
BootprintReturns a random image and fact about a celestial object like Mars, Jupiter or the Moon. Health & Science › NASA & Space | Free | None | JSON | Unlimited | Live |
CelesTrakSatellite orbital element sets (TLE/OMM) and catalog data for tracking objects in space. Health & Science › NASA & Space | Free | None | JSON | Unlimited | Live |
ISRO APIReference data on ISRO's launched spacecraft, launchers, customer satellites and centres. Health & Science › NASA & Space | Free | None | JSON | Unlimited | Live |
Launch Library 2Upcoming and past orbital rocket launches, agencies, pads, and mission data. Health & Science › NASA & Space | Freemium | None | JSON | 100–1k/day | Live |
NASA Open APIsNASA's own gateway to astronomy picture of the day, Mars rover photos, asteroid and Earth imagery data. Health & Science › NASA & Space | Free | API key | JSON | 10k+/day | Degraded |
NoctuaSkyLooks up stars, planets and deep-sky objects by name; powers the Stellarium Web planetarium. Health & Science › NASA & Space | None | JSON | — | Live | |
Open EphemerisComputes planetary positions, natal charts, transits and astrocartography from NASA JPL's DE440 ephemeris. Health & Science › NASA & Space | Freemium | API key | JSON | — | Live |
OrbitalWikiSatellite orbital data — TLE elements, operator, launch info — merged from CelesTrak, GCAT, and Wikidata. Health & Science › NASA & Space | Freemium | API key | JSON | 1k–10k/day | Live |
Satellite Passes APIPredicted next visible passes of a satellite (e.g. the ISS) above your latitude/longitude. Health & Science › NASA & Space | Free | None | JSON | Unlimited | Live |
Solar System OpenDataPhysical and orbital data for planets, moons, dwarf planets and asteroids in the solar system. Health & Science › NASA & Space | Free | API key | JSON | — | Live |
SpaceX API (r/SpaceX)Open-source SpaceX launch, rocket, capsule, and landing pad data; now offline (server unreachable). Health & Science › NASA & Space | None | JSON | Unlimited | Deprecated | |
TLEUp-to-date NORAD two-line element sets for satellites, queryable by satellite ID. Health & Science › NASA & Space | Free | None | JSON | Unlimited | Live |
BootprintFreeLive
Returns a random image and fact about a celestial object like Mars, Jupiter or the Moon.
None · JSON
Unlimited
llms.txt
CelesTrakFreeLive
Satellite orbital element sets (TLE/OMM) and catalog data for tracking objects in space.
None · JSON
Unlimited
no machine-readable spec
ISRO APIFreeLive
Reference data on ISRO's launched spacecraft, launchers, customer satellites and centres.
None · JSON
Unlimited
no machine-readable spec
Launch Library 2FreemiumLive
Upcoming and past orbital rocket launches, agencies, pads, and mission data.
None · JSON
100–1k/day
no machine-readable spec
NASA Open APIsFreeDegraded
NASA's own gateway to astronomy picture of the day, Mars rover photos, asteroid and Earth imagery data.
API key · JSON
10k+/day
OpenAPI spec
NoctuaSkyLive
Looks up stars, planets and deep-sky objects by name; powers the Stellarium Web planetarium.
None · JSON
—
OpenAPI spec
Open EphemerisFreemiumLive
Computes planetary positions, natal charts, transits and astrocartography from NASA JPL's DE440 ephemeris.
API key · JSON
—
OpenAPI spec · MCP server · llms.txt
OrbitalWikiFreemiumLive
Satellite orbital data — TLE elements, operator, launch info — merged from CelesTrak, GCAT, and Wikidata.
API key · JSON
1k–10k/day
OpenAPI spec · llms.txt
Satellite Passes APIFreeLive
Predicted next visible passes of a satellite (e.g. the ISS) above your latitude/longitude.
None · JSON
Unlimited
OpenAPI spec
Solar System OpenDataFreeLive
Physical and orbital data for planets, moons, dwarf planets and asteroids in the solar system.
API key · JSON
—
OpenAPI spec
SpaceX API (r/SpaceX)Deprecated
Open-source SpaceX launch, rocket, capsule, and landing pad data; now offline (server unreachable).
None · JSON
Unlimited
no machine-readable spec
TLEFreeLive
Up-to-date NORAD two-line element sets for satellites, queryable by satellite ID.
None · JSON
Unlimited
no machine-readable spec
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Choosing an NASA & Space API
Is there a free NASA & Space API?
Yes. NASA Open APIs, CelesTrak, Bootprint, ISRO API, Satellite Passes API and 2 others are free to use, and Launch Library 2, Open Ephemeris and OrbitalWiki have a free tier alongside paid plans.
Which NASA & Space APIs work without an API key?
Launch Library 2, CelesTrak, Bootprint, ISRO API, NoctuaSky and 2 others need no key or sign-up, so you can try them with a plain request.
Can I call an NASA & Space API from front-end JavaScript?
Launch Library 2, CelesTrak, ISRO API, Satellite Passes API and TLE allow cross-origin requests and need no key, so they work straight from the browser. For the others, call them from your server so your key stays private.
Can I use NASA & Space APIs in a commercial project?
NASA Open APIs, CelesTrak and Open Ephemeris permit commercial use. OrbitalWiki restricts it, for example to non-commercial or attributed use, so read the terms first.
Which NASA & Space APIs work with AI agents?
Open Ephemeris has both an MCP server and an OpenAPI spec. NASA Open APIs, NoctuaSky, OrbitalWiki, Satellite Passes API and Solar System OpenData publish an OpenAPI spec for generating clients and tools.
More specific: Satellite Tracking APIs
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