NASA

NASA (National Aeronautics and Space Administration) provides a suite of public APIs at api.nasa.gov offering access to space, Earth science, and aeronautics data. Key APIs include Astronomy Picture of the Day (APOD), Mars Rover Photos, Near Earth Object Web Service (NeoWs), DONKI space weather events, EPIC Earth imagery, and the NASA Image and Video Library. All APIs are free and accessible with an API key.

NASA publishes 9 APIs on the APIs.io network, including Asset API, Captions API, DONKI API, and 6 more. Tagged areas include Government, Science, and Space.

The NASA catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

NASA’s developer surface includes authentication, sandbox, developer portal, documentation, engineering blog, and 28 more developer resources.

🌐 Visit website 📡 Source on GitHub

33.4/100 thin ▬ flat Agent 26/100 agent aware Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessEnterprise

6 APIs

Government Science Space

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 33.4/100 · thin

Contract Quality 11.3 / 21

Developer Ergonomics 6.1 / 17

Access Clarity 0.0 / 17

Operational Transparency 1.5 / 11

Contract Governance 1.5 / 10

Discoverability 5.4 / 9

Regulatory Posture 6.4 / 15

Agent readiness — 26/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Government & Public Sector regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/nasa: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 9

Individual APIs this provider publishes, each with its own machine-readable definition.

NASA Asset API

The Asset API from NASA — 1 operation(s) for asset.

NASA Captions API

The Captions API from NASA — 1 operation(s) for captions.

NASA DONKI API

The DONKI API from NASA — 8 operation(s) for donki.

NASA EPIC API

The EPIC API from NASA — 5 operation(s) for epic.

NASA Mars Photos API

The Mars Photos API from NASA — 3 operation(s) for mars photos.

NASA Metadata API

The Metadata API from NASA — 1 operation(s) for metadata.

NASA Neo API

The Neo API from NASA — 3 operation(s) for neo.

NASA Planetary API

The Planetary API from NASA — 1 operation(s) for planetary.

NASA Search API

The Search API from NASA — 1 operation(s) for search.

Scroll for all 9

Open Collections 16

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

NASA Astronomy Picture of the Day (APOD) API

OPEN COLLECTION

NASA Astronomy Picture of the Day (APOD) Asset API

OPEN COLLECTION

NASA Astronomy Picture of the Day (APOD) Asset Captions API

OPEN COLLECTION

NASA Astronomy Picture of the Day (APOD) Asset DONKI API

OPEN COLLECTION

NASA DONKI (Space Weather Database Of Notifications, Knowledge, Information) API

OPEN COLLECTION

NASA Astronomy Picture of the Day (APOD) Asset EPIC API

OPEN COLLECTION

NASA EPIC (Earth Polychromatic Imaging Camera) API

OPEN COLLECTION

NASA Astronomy Picture of the Day (APOD) Asset Mars Photos API

OPEN COLLECTION

NASA Mars Rover Photos API

OPEN COLLECTION

NASA Astronomy Picture of the Day (APOD) Asset Metadata API

OPEN COLLECTION

NASA Image and Video Library API

OPEN COLLECTION

NASA Astronomy Picture of the Day (APOD) Asset Neo API

OPEN COLLECTION

NASA NeoWs (Near Earth Object Web Service) API

OPEN COLLECTION

NASA Astronomy Picture of the Day (APOD) Asset Planetary API

OPEN COLLECTION

NASA Astronomy Picture of the Day (APOD) Asset Search API

OPEN COLLECTION

Scroll for all 16

Arazzo Workflows 7

Multi-step API workflows described with the Arazzo specification.

NASA APOD Daily Digest

Pull the Astronomy Picture of the Day and enrich it with related assets from the NASA Image and Video Library.

ARAZZO

NASA DONKI Notification Triage

Poll DONKI space weather notifications and branch to the matching event endpoint for the detail the alert omits.

ARAZZO

NASA DONKI Space Weather Event Chain

Walk one space weather window end to end — solar flare, coronal mass ejection, CME analysis, interplanetary shock, geomagnetic storm.

ARAZZO

NASA EPIC Earth Imagery Retrieval

List the dates EPIC actually has imagery for, then pull both natural and enhanced color metadata for one of them.

ARAZZO

NASA Mars Rover Photo Harvest

Read a rover's mission manifest to find a sol that actually has photos, then harvest that sol's images.

ARAZZO

NASA Media Asset Retrieval

Search the NASA Image and Video Library, then resolve the downloadable files, metadata, and captions for a match.

ARAZZO

NASA Near Earth Object Close Approach Analysis

Page the asteroid catalog, look up a specific near-Earth object, and pull every other object approaching on the same date.

ARAZZO

Scroll for all 7

Pricing Plans 1

Published pricing tiers and plan structures.

Nasa Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Nasa Rate Limits

3 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Nasa Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Nasa Context

35 classes · 0 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

NASA API Rules

5 rules · 3 warnings 2 info

SPECTRAL

JSON Schema 10

Standalone JSON Schema definitions for this provider's data models.

APOD Image

9 properties

JSON SCHEMA

Rover Camera

4 properties

JSON SCHEMA

Close Approach

6 properties

JSON SCHEMA

Coronal Mass Ejection

8 properties

JSON SCHEMA

EPIC Image

10 properties

JSON SCHEMA

Geomagnetic Storm

3 properties

JSON SCHEMA

Near Earth Object

9 properties

JSON SCHEMA

Mars Rover Photo

6 properties

JSON SCHEMA

Mars Rover

5 properties

JSON SCHEMA

Solar Flare

8 properties

JSON SCHEMA

Scroll for all 10

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Nasa Authentication

apiKey · 1 scheme

SECURITY

Nasa Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Nasa Vulnerability Disclosure

Bugcrowd · contact published

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Nasa Agentic Access

24 operations

24 operations · 0 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Sandbox

Sandbox

Portal

Portal

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

WellKnown

WellKnown

X-MCPServerCandidate

X-MCPServerCandidate

LLMsTxt

LLMsTxt

Design & Contract 12

Pagination, idempotency, versioning, errors, and events

Conformance

ErrorCatalog

Lifecycle

Conventions

DataModel

Arazzo

Arazzo

Arazzo

Arazzo

Arazzo

Arazzo

Arazzo

Scroll for all 12

Build 2

SDKs, sample code, and the tooling you integrate with

Packages

Packages

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

VulnerabilityDisclosure

VulnerabilityDisclosure

Authentication

Authentication

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Other 6

Properties that don't map to a standard resource type

Overlay

Overlay

Overlay

Overlay

Overlay

Overlay

Source (apis.yml)

aid: nasa
name: NASA
description: NASA (National Aeronautics and Space Administration) provides a suite of public APIs at api.nasa.gov offering
  access to space, Earth science, and aeronautics data. Key APIs include Astronomy Picture of the Day (APOD), Mars Rover Photos,
  Near Earth Object Web Service (NeoWs), DONKI space weather events, EPIC Earth imagery, and the NASA Image and Video Library.
  All APIs are free and accessible with an API key.
type: Index
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: true
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: enterprise
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Enterprise
  confidence: high
  source:
  - plans
  - authentication
  - security
  - sandbox
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/nasa.png
url: https://raw.githubusercontent.com/api-evangelist/nasa/refs/heads/main/apis.yml
created: '2025-01-01'
modified: '2026-06-20'
specificationVersion: '0.23'
tags:
- Government
- Science
- Space
apis:
- aid: nasa:nasa-asset-api
  name: NASA Asset API
  description: The Asset API from NASA — 1 operation(s) for asset.
  humanURL: https://api.nasa.gov/#apod
  tags:
  - Asset
  properties:
  - type: OpenAPI
    url: openapi/nasa-asset-api-openapi.yml
  - type: Documentation
    url: https://api.nasa.gov/#apod
  - type: Documentation
    url: https://api.nasa.gov/#MarsPhotos
  - type: Documentation
    url: https://api.nasa.gov/#NeoWS
  - type: Documentation
    url: https://api.nasa.gov/#DONKI
  - type: Documentation
    url: https://api.nasa.gov/#EPIC
  - type: Documentation
    url: https://api.nasa.gov/#Images
- aid: nasa:nasa-captions-api
  name: NASA Captions API
  description: The Captions API from NASA — 1 operation(s) for captions.
  humanURL: https://api.nasa.gov/#apod
  tags:
  - Captions
  properties:
  - type: OpenAPI
    url: openapi/nasa-captions-api-openapi.yml
  - type: Documentation
    url: https://api.nasa.gov/#apod
  - type: Documentation
    url: https://api.nasa.gov/#MarsPhotos
  - type: Documentation
    url: https://api.nasa.gov/#NeoWS
  - type: Documentation
    url: https://api.nasa.gov/#DONKI
  - type: Documentation
    url: https://api.nasa.gov/#EPIC
  - type: Documentation
    url: https://api.nasa.gov/#Images
- aid: nasa:nasa-donki-api
  name: NASA DONKI API
  description: The DONKI API from NASA — 8 operation(s) for donki.
  humanURL: https://api.nasa.gov/#apod
  tags:
  - DONKI
  properties:
  - type: OpenAPI
    url: openapi/nasa-donki-api-openapi.yml
  - type: Documentation
    url: https://api.nasa.gov/#apod
  - type: Documentation
    url: https://api.nasa.gov/#MarsPhotos
  - type: Documentation
    url: https://api.nasa.gov/#NeoWS
  - type: Documentation
    url: https://api.nasa.gov/#DONKI
  - type: Documentation
    url: https://api.nasa.gov/#EPIC
  - type: Documentation
    url: https://api.nasa.gov/#Images
- aid: nasa:nasa-epic-api
  name: NASA EPIC API
  description: The EPIC API from NASA — 5 operation(s) for epic.
  humanURL: https://api.nasa.gov/#apod
  tags:
  - Epic
  tags_raw:
  - EPIC
  properties:
  - type: OpenAPI
    url: openapi/nasa-epic-api-openapi.yml
  - type: Documentation
    url: https://api.nasa.gov/#apod
  - type: Documentation
    url: https://api.nasa.gov/#MarsPhotos
  - type: Documentation
    url: https://api.nasa.gov/#NeoWS
  - type: Documentation
    url: https://api.nasa.gov/#DONKI
  - type: Documentation
    url: https://api.nasa.gov/#EPIC
  - type: Documentation
    url: https://api.nasa.gov/#Images
- aid: nasa:nasa-mars-photos-api
  name: NASA Mars Photos API
  description: The Mars Photos API from NASA — 3 operation(s) for mars photos.
  humanURL: https://api.nasa.gov/#apod
  tags:
  - Mars Photos
  properties:
  - type: OpenAPI
    url: openapi/nasa-mars-photos-api-openapi.yml
  - type: Documentation
    url: https://api.nasa.gov/#apod
  - type: Documentation
    url: https://api.nasa.gov/#MarsPhotos
  - type: Documentation
    url: https://api.nasa.gov/#NeoWS
  - type: Documentation
    url: https://api.nasa.gov/#DONKI
  - type: Documentation
    url: https://api.nasa.gov/#EPIC
  - type: Documentation
    url: https://api.nasa.gov/#Images
- aid: nasa:nasa-metadata-api
  name: NASA Metadata API
  description: The Metadata API from NASA — 1 operation(s) for metadata.
  humanURL: https://api.nasa.gov/#apod
  tags:
  - Metadata
  properties:
  - type: OpenAPI
    url: openapi/nasa-metadata-api-openapi.yml
  - type: Documentation
    url: https://api.nasa.gov/#apod
  - type: Documentation
    url: https://api.nasa.gov/#MarsPhotos
  - type: Documentation
    url: https://api.nasa.gov/#NeoWS
  - type: Documentation
    url: https://api.nasa.gov/#DONKI
  - type: Documentation
    url: https://api.nasa.gov/#EPIC
  - type: Documentation
    url: https://api.nasa.gov/#Images
- aid: nasa:nasa-neo-api
  name: NASA Neo API
  description: The Neo API from NASA — 3 operation(s) for neo.
  humanURL: https://api.nasa.gov/#apod
  tags:
  - NEO
  tags_raw:
  - Neo
  properties:
  - type: OpenAPI
    url: openapi/nasa-neo-api-openapi.yml
  - type: Documentation
    url: https://api.nasa.gov/#apod
  - type: Documentation
    url: https://api.nasa.gov/#MarsPhotos
  - type: Documentation
    url: https://api.nasa.gov/#NeoWS
  - type: Documentation
    url: https://api.nasa.gov/#DONKI
  - type: Documentation
    url: https://api.nasa.gov/#EPIC
  - type: Documentation
    url: https://api.nasa.gov/#Images
- aid: nasa:nasa-planetary-api
  name: NASA Planetary API
  description: The Planetary API from NASA — 1 operation(s) for planetary.
  humanURL: https://api.nasa.gov/#apod
  tags:
  - Planetary
  properties:
  - type: OpenAPI
    url: openapi/nasa-planetary-api-openapi.yml
  - type: Documentation
    url: https://api.nasa.gov/#apod
  - type: Documentation
    url: https://api.nasa.gov/#MarsPhotos
  - type: Documentation
    url: https://api.nasa.gov/#NeoWS
  - type: Documentation
    url: https://api.nasa.gov/#DONKI
  - type: Documentation
    url: https://api.nasa.gov/#EPIC
  - type: Documentation
    url: https://api.nasa.gov/#Images
- aid: nasa:nasa-search-api
  name: NASA Search API
  description: The Search API from NASA — 1 operation(s) for search.
  humanURL: https://api.nasa.gov/#apod
  tags:
  - Search
  properties:
  - type: OpenAPI
    url: openapi/nasa-search-api-openapi.yml
  - type: Documentation
    url: https://api.nasa.gov/#apod
  - type: Documentation
    url: https://api.nasa.gov/#MarsPhotos
  - type: Documentation
    url: https://api.nasa.gov/#NeoWS
  - type: Documentation
    url: https://api.nasa.gov/#DONKI
  - type: Documentation
    url: https://api.nasa.gov/#EPIC
  - type: Documentation
    url: https://api.nasa.gov/#Images
common:
- type: AgenticAccess
  url: agentic-access/nasa-agentic-access.yml
- type: DomainSecurity
  url: security/nasa-domain-security.yml
- type: VulnerabilityDisclosure
  url: security/nasa-vulnerability-disclosure.yml
- type: Authentication
  url: authentication/nasa-authentication.yml
- type: Packages
  url: packages/nasa-packages.yml
- type: WellKnown
  url: well-known/nasa-well-known.yml
- type: X-MCPServerCandidate
  url: mcp/nasa-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: LLMsTxt
  url: llms/nasa-llms.txt
- type: Conformance
  url: conformance/nasa-conformance.yml
- type: ErrorCatalog
  url: errors/nasa-problem-types.yml
- type: Lifecycle
  url: lifecycle/nasa-lifecycle.yml
- type: Conventions
  url: conventions/nasa-conventions.yml
- type: DataModel
  url: data-model/nasa-data-model.yml
- type: Sandbox
  url: sandbox/nasa-sandbox.yml
- type: Overlay
  url: overlays/nasa-apod-overlay.yaml
- type: Overlay
  url: overlays/nasa-donki-overlay.yaml
- type: Overlay
  url: overlays/nasa-epic-overlay.yaml
- type: Overlay
  url: overlays/nasa-mars-rover-photos-overlay.yaml
- type: Overlay
  url: overlays/nasa-nasa-image-and-video-library-overlay.yaml
- type: Overlay
  url: overlays/nasa-neo-overlay.yaml
- type: Arazzo
  url: arazzo/nasa-apod-daily-digest-workflow.yml
  name: NASA APOD Daily Digest
- type: Arazzo
  url: arazzo/nasa-media-asset-retrieval-workflow.yml
  name: NASA Media Asset Retrieval
- type: Arazzo
  url: arazzo/nasa-mars-rover-photo-harvest-workflow.yml
  name: NASA Mars Rover Photo Harvest
- type: Arazzo
  url: arazzo/nasa-neo-close-approach-analysis-workflow.yml
  name: NASA Near Earth Object Close Approach Analysis
- type: Arazzo
  url: arazzo/nasa-epic-earth-imagery-workflow.yml
  name: NASA EPIC Earth Imagery Retrieval
- type: Arazzo
  url: arazzo/nasa-donki-space-weather-event-chain-workflow.yml
  name: NASA DONKI Space Weather Event Chain
- type: Arazzo
  url: arazzo/nasa-donki-notification-triage-workflow.yml
  name: NASA DONKI Notification Triage
- type: LinkedIn
  url: https://www.linkedin.com/company/nasa
- url: https://api.nasa.gov
  type: Portal
- url: https://www.nasa.gov
  type: Website
- url: https://data.nasa.gov
  type: Documentation
- url: https://github.com/nasa
  type: GitHubOrganization
- type: Integrations
  url: https://www.nasa.gov/apps/
- url: https://www.nasa.gov/feed/
  type: Blog
integrations:
- name: NASA
- name: Tracy Arm’s Post-Tsunami Landscape
- name: A Sea of Spinning Clouds
- name: Melting Snow Off Shivelyuch
- name: Hubble Spots a Starry Spiral
- name: D-Site
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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