A
APIs Score

NASA API

Beginner's Pick Science & Math / No Auth Required Beginner HTTPS
Free to Use
92 A+
Metadata Score 0 50 100 Metadata estimate · not endpoint-tested
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Overview

The NASA API provides free access to a huge collection of NASA data including the Astronomy Picture of the Day (APOD), Mars rover photos, near-Earth asteroid data, and satellite imagery. You can use the demo key "DEMO_KEY" to get started immediately with generous rate limits for testing. It is one of the best beginner-friendly APIs for space enthusiasts and developers alike.

Beginner Tip

Start with the APOD endpoint (Astronomy Picture of the Day) — it returns a beautiful image and explanation with a single simple request, and is perfect for learning how to display API data on a webpage.

Available Data

The kind of data this API exposes, based on its documentation. We could not call the endpoint to confirm the exact field names.

space mission data
celestial body information
launch schedule
astronomical images
Use case: Integrate nasa data, including imagery data into web and mobile applications

Example Response

Illustrative shape only — we were not able to call this endpoint (it requires credentials or exposes no public sample URL), so the fields below show the kind of data this API returns rather than a recorded response.

JSON Response · Illustrative 
{
  "title": "Astronomy Picture of the Day",
  "date": "2025-01-15",
  "explanation": "A stunning nebula captured by the James Webb Telescope...",
  "url": "https://apod.nasa.gov/apod/image/...",
  "media_type": "image"
}

Field Reference

title The title of the astronomy picture or media for the given date.
url Direct URL to the image or video featured for the day.
explanation A paragraph written by a professional astronomer explaining the image.
date The date of the picture in YYYY-MM-DD format.
media_type Either "image" or "video" — useful for deciding how to render the content.
hdurl URL to the high-definition version of the image, if available.

Implementation Example

Calls a real endpoint of this API. Replace any placeholder credentials with your own key.

Request 
const url = "https://api.nasa.gov/planetary/apod?api_key=DEMO_KEY";
const response = await fetch(url);
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data);

What Can You Build?

Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.

Common Errors & Troubleshooting

Generated guidance based on this API's documentation, not observed by us. Treat it as a starting point and check against the provider's own error reference.

429 Too Many Requests You have exceeded the rate limit. The DEMO_KEY allows 30 requests/hour and 50 requests/day.
✓ Sign up for a free API key at https://api.nasa.gov to get 1,000 requests/hour, or wait until your quota resets.
400 Bad Request with date parameter The date format is incorrect or out of the valid range.
✓ Use YYYY-MM-DD format (e.g., 2024-01-15) and ensure the date is not before 1995-06-16 (the first APOD).
JSON with "error" key An invalid parameter was passed to the endpoint.
✓ Check the API documentation for required parameter names — for example, APOD uses "date" not "day" or "query".

Metadata Score Breakdown

Estimated from metadata — endpoint not independently tested

This score is estimated from observable metadata — HTTPS support, authentication model, declared CORS, and documentation reachability — because the API requires authentication or exposes no publicly testable endpoint. The five-signal breakdown is only shown for live-tested APIs.

Metadata estimate · endpoint not independently tested

How is this scored? →

Technical Specifications

Auth No Auth
HTTPS REQUIRED
CORS NO
Category Science & Math
Difficulty Beginner
Listing details not endpoint-verified

Related Tags

#science-and-math

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