specification: API Commons Plans
specificationVersion: '0.1'
provider: CycleCalcs
providerId: cyclecalcs
generated: '2026-08-09'
method: searched
created: '2026-08-09'
modified: '2026-08-09'
tags:
  - Astronomy
  - Ephemeris
description: >-
  Four tiers. Basic is free, keyless and permanent — "most integrations live
  on the free tier indefinitely; that is the design, not a trial." The three
  paid rungs sell monthly volume through the RapidAPI marketplace, which
  issues and bills the key. Every tier serves all 29 endpoints at full
  precision and returns the same answer to the last digit; money buys request
  volume and how much sky a single request may ask for, and nothing else.
sources:
  - https://www.cyclecalcs.com/api.html
  - https://www.cyclecalcs.com/api/keys.html
  - https://rapidapi.com/info-8KZIhinZ9/api/cyclecalcs-astronomy-api3
marketplace: RapidAPI
signup: >-
  None for Basic — no account, no key, no card. A RapidAPI subscription is the
  only signup that exists.
plans:
  - id: cyclecalcs-basic
    name: Basic
    type: free
    price: 0
    currency: USD
    timeFrame: month
    keyless: true
    suited_to: One small app — a script, a page, or a product that fits the free day.
    entries:
      - {label: Requests a minute, name: rpm, type: quota, metric: request, limit: 300, timeFrame: minute}
      - {label: Requests an hour, name: rph, type: quota, metric: request, limit: 2000, timeFrame: hour}
      - {label: Requests a day, name: rpd, type: quota, metric: request, limit: 5000, timeFrame: day}
      - {label: Monthly meter, name: rpmo, type: quota, metric: request, limit: -1, timeFrame: month}
  - id: cyclecalcs-pro
    name: Pro
    type: subscription
    price: 5
    currency: USD
    timeFrame: month
    url: https://rapidapi.com/info-8KZIhinZ9/api/cyclecalcs-astronomy-api3
    suited_to: One busy app — traffic that outgrew the free day.
    entries:
      - {label: Requests a minute, name: rpm, type: quota, metric: request, limit: 600, timeFrame: minute}
      - {label: Requests an hour, name: rph, type: quota, metric: request, limit: 10000, timeFrame: hour}
      - {label: Requests a day, name: rpd, type: quota, metric: request, limit: 50000, timeFrame: day}
      - {label: Requests a month, name: rpmo, type: quota, metric: request, limit: 500000, timeFrame: month}
  - id: cyclecalcs-ultra
    name: Ultra
    type: subscription
    price: 9
    currency: USD
    timeFrame: month
    url: https://rapidapi.com/info-8KZIhinZ9/api/cyclecalcs-astronomy-api3
    recommended: true
    suited_to: A live product — backfills, and traffic you do not control.
    entries:
      - {label: Requests a minute, name: rpm, type: quota, metric: request, limit: 1200, timeFrame: minute}
      - {label: Requests an hour, name: rph, type: quota, metric: request, limit: 25000, timeFrame: hour}
      - {label: Requests a day, name: rpd, type: quota, metric: request, limit: 100000, timeFrame: day}
      - {label: Requests a month, name: rpmo, type: quota, metric: request, limit: 800000, timeFrame: month}
  - id: cyclecalcs-mega
    name: Mega
    type: subscription
    price: 15
    currency: USD
    timeFrame: month
    url: https://rapidapi.com/info-8KZIhinZ9/api/cyclecalcs-astronomy-api3
    suited_to: Several products — bulk jobs, or several apps on one key.
    entries:
      - {label: Requests a minute, name: rpm, type: quota, metric: request, limit: 2000, timeFrame: minute}
      - {label: Requests an hour, name: rph, type: quota, metric: request, limit: 50000, timeFrame: hour}
      - {label: Requests a day, name: rpd, type: quota, metric: request, limit: 200000, timeFrame: day}
      - {label: Requests a month, name: rpmo, type: quota, metric: request, limit: 1000000, timeFrame: month}
identical_on_every_tier:
  - All 29 endpoints
  - Every field, full precision
  - The same answer, to the last digit
  - JSON, CSV and TXT
  - RFC 9457 error documents
  - RateLimit headers on every response
  - CDN cache hits, which cost nothing
  - The MCP server
range_caps_note: >-
  Ultra and Mega carry the same per-request range caps, so above Ultra the
  purchase is volume, not reach. Full cap table in
  rate-limits/cyclecalcs-rate-limits.yml and live at /v2/conventions as
  range_caps_by_shape.
other_products:
  - name: Moon Calendar 2027 (print)
    description: >-
      A per-location typeset PDF moon calendar plus a subscribable calendar
      feed — the site's one paid consumer product, unrelated to API tiers.
    url: https://www.cyclecalcs.com/moon-calendar-2027.html