name: Unit21 Rate Limits
description: >-
  Unit21 does not publicly document specific API rate limits in their
  developer documentation. As an enterprise-only platform with custom contracts,
  rate limits and throughput constraints are negotiated as part of individual
  service agreements. The API is designed for high-volume ingestion, monitoring
  4.5 billion monthly events across its customer base. Specific limits should
  be confirmed with Unit21 during contract negotiation or via enterprise support.
url: https://docs.unit21.ai/reference/api-reference
created: "2026-06-13"
modified: "2026-06-13"

notes:
  - Unit21 rate limits are not publicly documented and are set per enterprise contract
  - The platform is designed for high-volume financial transaction monitoring
  - Real-time rule endpoints handle sub-250ms fraud detection latency
  - Batch and bulk export endpoints are available for high-volume data ingestion
  - Contact Unit21 sales or support for specific throughput limits

authentication:
  type: API Key
  header: u21-key
  notes: >-
    All API requests must be made over HTTPS. Requests without a valid API key
    will fail. API keys are provisioned per organization name and environment
    (sandbox vs production).

environments:
  - name: Sandbox
    baseURL: https://sandbox1-api.unit21.com/v1
    notes: For development and testing purposes
  - name: Production
    baseURL: https://<org_name>-api.unit21.com/v1
    notes: Production environment; base URL is organization-specific

encryption:
  algorithm: 128-bit AES (CBC mode, PKCS7 padding)
  mac: HMAC-SHA256
  notes: >-
    Optional additional payload encryption is available on all API endpoints
    beyond the mandatory HTTPS/TLS transport encryption.

throttling:
  documented: false
  recommendation: >-
    Consult Unit21 enterprise support for specific rate limit quotas. Use
    bulk/batch endpoints for large data ingestion workloads to minimize
    request overhead.