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 is listed with 1 API on the APIs.io network. Tagged areas include Astronomy, JWST, NASA, Science, and Space.

🌐 Visit website 📡 Profile data on GitHub

15.1/100 emerging ▬ flat Agent 1/100 human only Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-10-23 · rubric v0.25.0 · Show this score on your site →

AccessFreemium

1 API

AstronomyJWSTNASA Science Space

Kin Score

Kin Score How this is scored →
scored 2026-10-23 · rubric v0.25.0

Composite quality — 15.1/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 1.6 / 17

Access Clarity 5.4 / 17

Operational Transparency 0.9 / 11

Contract Governance 0.0 / 10

Discoverability 5.6 / 9

Regulatory Posture 1.5 / 15

Agent readiness — 1/100 · 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

Pagination 5 / 5

Distinct Operations 3 / 3

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) 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 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.

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/.

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<a href="https://apis.io/providers/james-webb-space-telescope-api/"><img src="https://apis.io/badge/james-webb-space-telescope-api/card.svg" alt="James Webb Space Telescope API on APIs.io — Kin Score by API Evangelist"></a>

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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/james-webb-space-telescope-api: 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Space and Satellite (operators, earth observation, ground segment)	undeclared	-	-	-
Raycast Store Extensions (first-party publishers + community-wrapped products)	undeclared	-	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

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

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

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: Plans
  url: plans/james-webb-space-telescope-api-plans-pricing.yml
- type: RateLimits
  url: rate-limits/james-webb-space-telescope-api-rate-limits.yml
- type: FinOps
  url: finops/james-webb-space-telescope-api-finops.yml
- 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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