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Stablecoin Account API Publisher Disclaimer The sandbox environment runs the same API surface as production against test balances, so you can integrate and verify each flow without moving real funds.

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Sandbox base URL

All endpoints use the same paths as production — only the base URL changes. Authenticate with your sandbox credentials: request a token from the Access Token endpoint and send it as x-auth-token.

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What to test

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Webhook testing

Configure your sandbox webhook endpoint, then trigger each order type and confirm your handler:
  • Accepts every event listed on the Deposit, Withdrawal, Conversion, and Transfer pages.
  • Uses event_id for deduplication — the same event can be delivered more than once.
  • Uses source_id to look up the order rather than trusting the payload alone.
  • Handles out-of-order delivery: a success event can arrive before a lagging pending retry.
  • Tolerates unknown fields in data, such as need_travel_rule appearing only on flagged deposits.

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Moving to production

  • Swap the base URL to https://api.uqpay.com/api and switch to production credentials.
  • Re-check List Supported Assets and Networks in production — sandbox and production availability, minimums, and fees can differ.
  • Reconfigure your production webhook endpoint and verify one event of each type end to end.