apiCommonsRateLimits: "0.1"
name: Calendarific Rate Limits
provider: Calendarific
url: https://calendarific.com/api-documentation
modified: "2026-05-29"
scope:
  - per-api-key
enforcement:
  exceededResponse:
    status: 429
    description: HTTP 429 returned when the monthly request quota or daily soft cap is exceeded.
defaults:
  daily:
    requests: 1000
    description: Free tier daily soft cap documented as 1,000 requests per day.
quotas:
  - plan: free
    requestsPerMonth: 500
    requestsPerDay: 1000
    notes: Monthly cap is the hard ceiling; daily cap documented in API documentation as a fair-use ceiling.
  - plan: starter
    requestsPerMonth: 10000
  - plan: business
    requestsPerMonth: 50000
  - plan: enterprise
    requestsPerMonth: 50000000
concurrency:
  documented: false
  notes: Calendarific does not publish per-second/per-minute concurrency limits; quotas are monthly.
headers:
  documented: false
  notes: API documentation does not specify standard rate-limit response headers (X-RateLimit-*).
errors:
  - status: 429
    code: rate_limit_exceeded
    description: Monthly request quota exceeded for the API key.
  - status: 401
    code: unauthorized
    description: Missing or invalid api_key parameter.
  - status: 422
    code: invalid_parameters
    description: Malformed or missing required query parameters.