name: openFDA API Rate Limits
description: Rate limits for the openFDA REST API. Limits vary based on whether an API key is used.
url: https://open.fda.gov/apis/authentication/

rateLimits:
  - plan: Anonymous (no API key)
    requests: 240
    period: minute
    unit: IP address
    notes: Without an API key, the limit is per IP address.

  - plan: API Key (Free)
    requests: 240
    period: minute
    unit: key
    notes: Per API key, not per IP.

  - plan: API Key (Free)
    requests: 120000
    period: day
    unit: key
    notes: Daily limit per API key.

enforcement: HTTP 429 Too Many Requests returned when limit exceeded.
keyRequired: false
keySignupURL: https://open.fda.gov/apis/authentication/