name: CBP Rate Limits
description: >-
  U.S. Customs and Border Protection does not publish formal rate limits for
  its trade APIs. Access to production systems (AESDirect WebLink, ACE ABI/EDI,
  eAPIS) is governed by certification and registration requirements rather than
  programmatic rate enforcement. Throughput expectations are shaped by EDI
  session limits and the operational requirements of the trade systems.
rateLimits:
  - api: AESDirect WebLink Inquiry API
    limit: Not publicly documented
    window: Not publicly documented
    notes: >-
      HTTP POST transactions only; GET not supported due to query-string length
      limits. Access is restricted to CBP-certified third-party applications.
      Rate limiting is not specified in public documentation; practical
      throughput is negotiated during the AESWebLink certification process.
    url: https://www.cbp.gov/trade/automated/aesdirect-weblink-inquiry-api

  - api: AESDirect WebLink Submission API
    limit: Not publicly documented
    window: Not publicly documented
    notes: >-
      HTTP POST transactions only. Each submission requires a valid AES filing
      context. Concurrent session and throughput limits are not published;
      consult CBP during the certification process for any system capacity
      constraints.
    url: https://www.cbp.gov/trade/automated/aesdirect-weblink-submission-api

  - api: ACE / ABI EDI
    limit: Not publicly documented
    window: Not publicly documented
    notes: >-
      EDI connectivity operates under a CBP-issued ABI certification. Message
      throughput is bounded by the session parameters defined in the CATAIR
      (CBP and Trade Automated Interface Requirements). Production capacity
      is managed operationally by CBP's trade systems team.
    url: https://www.cbp.gov/trade/automated/catair

  - api: eAPIS
    limit: Not publicly documented
    window: Not publicly documented
    notes: >-
      eAPIS imposes no stated rate limits. Manifest submissions are event-driven
      (one submission per flight/voyage departure or arrival). Bulk XML and
      UN/EDIFACT PAXLST uploads are supported but no per-session throughput
      caps are published.
    url: https://www.cbp.gov/travel/travel-industry-personnel/advance-passenger-information-system

  - api: CBP Public Data Portal
    limit: Not publicly documented
    window: Not publicly documented
    notes: >-
      The public data portal provides downloadable datasets (not a REST API
      with programmatic endpoints). No rate limiting applies to dataset
      downloads, though the portal is intended for statistical reporting use
      rather than high-frequency data ingestion.
    url: https://www.cbp.gov/newsroom/stats/cbp-public-data-portal