James Webb Space Telescope API

A free, third-party API for accessing James Webb Space Telescope data sourced from the Mikulski Archive for Space Telescopes (MAST). The API provides access to JWST images, observations, and data filterable by program, type, and other parameters. It is built by an independent engineer (not an official NASA, ESA, or CSA service) and data is available under CC-BY 4.0. Authentication is via API key obtained at signup.

James Webb Space Telescope API publishes 1 API on the APIs.io network. Tagged areas include Astronomy, JWST, NASA, Science, and Space.

🌐 Visit website 📡 Source on GitHub

17.7/100 emerging ▬ flat Agent 3/100 human only saas Full breakdown ↓
scored 2026-09-15 · rubric v0.22.0

AccessFreemium

1 APIs

AstronomyJWSTNASA Science Space

Kin Score

Kin Score How this is scored →
scored 2026-09-15 · rubric v0.22.0

Composite quality — 17.7/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 1.9 / 20

Access Clarity 7.9 / 20

Operational Transparency 1.0 / 13

Contract Governance 0.0 / 12

Discoverability 6.9 / 10

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 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 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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APIs 1

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

James Webb Space Telescope API

Programmatic access to JWST images and observations sourced from the MAST archive. Filter and query by program, observation type, and other attributes. Requires an API key obtai...

Pricing Plans 1

Published pricing tiers and plan structures.

James Webb Space Telescope Api Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

James Webb Space Telescope Api Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

James Webb Space Telescope Api Finops

FINOPS

Security Posture 1

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

James Webb Space Telescope Api Domain Security

TLSv1.3

SECURITY

Resources

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 1

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: james-webb-space-telescope-api
name: James Webb Space Telescope API
description: A free, third-party API for accessing James Webb Space Telescope data sourced from the Mikulski Archive for Space
  Telescopes (MAST). The API provides access to JWST images, observations, and data filterable by program, type, and other
  parameters. It is built by an independent engineer (not an official NASA, ESA, or CSA service) and data is available under
  CC-BY 4.0. Authentication is via API key obtained at signup.
type: Index
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
position: Consuming
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/james-webb-space-telescope-api.png
tags:
- Astronomy
- JWST
- NASA
- Science
- Space
url: https://raw.githubusercontent.com/api-evangelist/james-webb-space-telescope-api/refs/heads/main/apis.yml
created: '2024-11-07'
modified: '2026-04-28'
specificationVersion: '0.23'
apis:
- aid: james-webb-space-telescope-api:james-webb-space-telescope-api
  name: James Webb Space Telescope API
  description: Programmatic access to JWST images and observations sourced from the MAST archive. Filter and query by program,
    observation type, and other attributes. Requires an API key obtained via signup at jwstapi.com.
  humanURL: https://jwstapi.com
  baseURL: https://api.jwstapi.com
  tags:
  - Astronomy
  - JWST
  - Science
  - Space
  properties:
  - type: Documentation
    url: https://jwstapi.com
  - type: Signup
    url: https://jwstapi.com
common:
- type: DomainSecurity
  url: security/james-webb-space-telescope-api-domain-security.yml
- type: Website
  url: https://jwstapi.com
- type: TermsOfService
  name: License
  description: Data available under CC-BY 4.0.
  url: https://creativecommons.org/licenses/by/4.0/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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