specification: API Commons Plans
specificationVersion: '0.1'
schema: https://raw.githubusercontent.com/api-evangelist/interface-research/main/schema/api-commons.yml#/$defs/Plans
provider: Astronomy API
providerId: astronomy-api
created: '2026-05-04'
modified: '2026-09-04'
generated: '2026-09-04'
method: searched
source: >-
  https://astronomyapi.com/ (homepage copy, read from the compiled Angular
  bundle main-7RL7YQZX.js) and https://docs.astronomyapi.com/ (Getting Started,
  Known Issues). Probed https://astronomyapi.com/pricing on 2026-09-04.
plan_count: 0
tags:
  - Astronomy
  - Celestial Data
  - Space
  - Moon Phases
  - Star Charts
description: >-
  Astronomy API PUBLISHES NO PLANS. There is no pricing page and no price of any
  kind on the public site: sign-up is free and self-serve, and the only stated
  path to more capacity is an email.
findings:
  no_pricing_page:
    probed_url: https://astronomyapi.com/pricing
    http_status: 200
    verdict: soft-404
    evidence: >-
      The 200 is the Angular SPA's 13,109-byte catch-all shell. The application's
      compiled route table contains exactly: "", "/", auth/sign-in, auth/signup,
      auth/logout, auth/password-reset, dashboard, dashboard/applications/new,
      privacy-policy, terms-of-service. There is no `pricing` route and no
      lazy-loaded chunk carrying one, so the page does not exist — the apis.yml
      pointer that claimed it has been removed.
  paid_tiers_are_email_only:
    quote: >-
      "Custom endpoints and high API request rates are available on paid plans.
      Send an email to contact@astronomyapi.com"
    source: https://astronomyapi.com/
    meaning: >-
      Paid capacity exists but is negotiated by mail. No tier names, no quotas,
      no prices, no currency, no billing period are published anywhere on the
      provider's surface.
  free_access:
    quote: >-
      "Go to the Signup page to create your free account." — after which the
      developer creates an Application and receives an Application ID and
      Application Secret.
    source: https://docs.astronomyapi.com/
    meaning: >-
      Self-serve free access with no card and no stated included quota. The
      limit that actually applies is an undocumented IP- and
      consumption-based throttle; see rate-limits/astronomy-api-rate-limits.yml.
  funding_appeal:
    quote: >-
      "Help Us Keep the Stars Within Reach: Support AstronomyAPI ... High traffic
      and usage have led to service outages, straining our resources ... We've
      started a fundraiser so you can help us to keep the service alive."
    source: https://astronomyapi.com/
    meaning: >-
      The provider's headline call to action is a donation appeal, not a
      subscription. Recorded because it is the clearest public statement of this
      API's commercial model: a free service funded by contributions with
      bespoke paid arrangements on request.
plans: []
note: >-
  This file previously carried a three-tier Free/Professional/Enterprise
  scaffold with invented quotas (1,000 and 100,000 requests/month), invented
  rate limits and `price: TBD`, written by the 2026-05-04 bulk sweep and marked
  `method: generated`. None of it came from Astronomy API. It has been replaced
  with the measured result — zero published plans — because an honest zero is
  data and a plausible invented tier is not.
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com