rateLimits:
  - api: DPLA Items API
    description: >-
      DPLA does not publish a formal rate limit policy. The API is a free
      public service and developers are expected to use it responsibly.
      No documented per-second, per-minute, or per-day request caps exist
      in the public API documentation. Abuse or high-volume automated access
      may result in throttling at the discretion of DPLA infrastructure.
      Developers building production applications should implement client-side
      request pacing and caching to avoid placing excessive load on the service.
    unauthenticated:
      allowed: false
      notes: All requests require a valid api_key parameter or Authorization header.
    authenticated:
      requests: not formally documented
      notes: >-
        No hard numeric limit is published. DPLA recommends responsible usage.
        page_size is capped at 100 per request; facet_size is capped at 2,000.
    constraints:
      - name: Page size maximum
        value: 100
        description: Maximum number of records returnable in a single search response.
      - name: Batch item fetch maximum
        value: 50
        description: Maximum number of item IDs that can be fetched in a single request.
      - name: Facet size maximum
        value: 2000
        description: Maximum number of facet values returnable per query.
    url: https://pro.dp.la/developers/api-codex