Exoplanets · Data API

Confirmed Exoplanets Catalogue

Every confirmed planet discovered outside our solar system, with its size, orbit and distance.

A catalogue of all confirmed exoplanets with their host star, discovery year and method, orbital period, radius, mass, temperature and distance from Earth. Education platforms, science apps, researchers and AI tutors use it to explore and explain planetary discoveries.

Get API key View docs

Source: NASA Exoplanet Archive - Planetary Systems Composite Parameters · Public domain (NASA data, free to use) · This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with NASA.

Endpoints

Every request is authenticated with your X-API-Key and counted against your plan.

GET /v1/data/confirmed-exoplanets-catalogue
GET /v1/data/confirmed-exoplanets-catalogue/search?q=...
GET /v1/data/confirmed-exoplanets-catalogue/{key}

Base path /v1/data/confirmed-exoplanets-catalogue · full reference in the interactive docs. Also exposed as an MCP tool for AI agents.

Fields

Field	Type	Description
planet_name	str	Planet name
host_star	str	Host star name
discovery_year	int	Year of discovery
discovery_method	str	Detection method, e.g. Transit
discovery_facility	str	Observatory or mission that made the discovery
orbital_period_days	float	Orbital period in days
radius_earth	float	Planet radius in Earth radii
mass_earth	float	Planet mass in Earth masses
equilibrium_temp_k	float	Equilibrium temperature in Kelvin
distance_parsecs	float	Distance from Earth in parsecs

What you get

All confirmed exoplanets in one catalogue

Size, mass, orbit, temperature and distance

Filter by discovery year, method or facility

Search by planet name

Sourced from the NASA Exoplanet Archive

FAQ

How many planets are included?: All planets confirmed in the NASA Exoplanet Archive, currently several thousand.
Why are some values missing?: Not every property has been measured for every planet.
How is it updated?: The archive adds newly confirmed planets as they are published.

Pricing

Simple, transparent pricing

Start free, upgrade when you need more. All plans include full API access.

Free

$0forever

Get started and explore the API

100 requests/day

100 API requests per day
All endpoints included
Community support

Get Started

Pro

$9/month

For production apps and AI agents

10,000 requests/day

10,000 API requests per day
All endpoints included
Priority support
Usage dashboard

Upgrade to Pro

Enterprise

$49/month

Unlimited access for high-volume use

Unlimited requests

Unlimited API requests
All endpoints included
Priority support
Usage dashboard
Dedicated support channel

Go Enterprise

Getting Started

Start building in minutes

Register

Create an account to get your API key. It's free — no credit card required.

curl -X POST https://api.aristocles.com.au/v1/auth/register \
  -H "Content-Type: application/json" \
  -d '{"email": "you@example.com", "name": "Your Name"}'

Make a request

Use your API key in the X-API-Key header to authenticate requests.

curl https://api.aristocles.com.au/v1/data/asx \
  -H "X-API-Key: your_api_key_here"

Upgrade

Need more requests? Upgrade to Pro or Enterprise — you'll be redirected to Stripe Checkout.

curl -X POST "https://api.aristocles.com.au/v1/billing/checkout?tier=pro" \
  -H "X-API-Key: your_api_key_here"

Check usage

Monitor your daily request count and remaining quota at any time.

curl https://api.aristocles.com.au/v1/usage \
  -H "X-API-Key: your_api_key_here"