generated: '2026-08-11'
method: searched
source: https://exchange-developer.crypto.com/exchange/v1/docs/api/rest-common-api-reference
environments:
- api: Crypto.com Exchange REST API v1
  name: UAT Sandbox
  base: https://uat-api.3ona.co/exchange/v1
  production: https://api.crypto.com/exchange/v1
  declared_in_openapi: true
  note: The UAT sandbox is declared as a second entry in the published OpenAPI servers[] block, which is the strongest
    form of sandbox publication - an agent reading only the contract can find it.
- api: Crypto.com Exchange WebSocket API v1 (User)
  name: UAT Sandbox
  base: wss://uat-stream.3ona.co/exchange/v1/user
  production: wss://stream.crypto.com/exchange/v1/user
- api: Crypto.com Exchange WebSocket API v1 (Market Data)
  name: UAT Sandbox
  base: wss://uat-stream.3ona.co/exchange/v1/market
  production: wss://stream.crypto.com/exchange/v1/market
- api: Crypto.com Pay API
  name: Test mode
  base: https://pay.crypto.com/api
  separation: key-prefix
  note: Same host and path for both modes; the key decides. Test-mode secret keys are prefixed sk_test_, live-mode
    keys sk_live_. Test mode does not touch live data or the payment networks.
test_credentials:
  published: false
  note: No shared/public test credentials are published for any surface. Sandbox and test keys are self-provisioned
    - Exchange UAT keys from the UAT site, Pay test keys from the Merchant Dashboard.
simulation:
- surface: Crypto.com Pay checkout
  mechanism: In test mode the checkout QR code is clickable and mimics a confirmed payment in the Crypto.com App.
  source: https://pay-docs.crypto.com/
- surface: Crypto.com Pay redirect URLs
  mechanism: In test mode redirect domains can be added to the whitelist instantly; production additions require
    Compliance approval.
  source: https://pay-docs.crypto.com/
- surface: cdcx CLI / MCP
  mechanism: 'Two independent safety nets rather than a server sandbox: --dry-run previews the exact request without
    sending it, and `cdcx paper` runs a local paper-trading simulation against live prices with no auth.'
  source: https://github.com/crypto-com/cdcx-cli
test_values:
  magic_values: null
  test_cards: null
  test_clocks: null
  note: Not applicable - Crypto.com Pay settles in crypto and publishes no test card numbers, test IBANs or time-simulation
    tooling.
x-evidence:
  fetched: '2026-08-11'
  urls:
  - https://exchange-developer.crypto.com/exchange/v1/docs/api/rest-common-api-reference.md
  - https://pay-docs.crypto.com/
  http_status: 200