Circle APIs support idempotent requests, which are a type of request method that executes only once no matter how many times the request is sent. Result: you can safely retry API calls when things go wrong during a transaction (such as a network connection issue) before you receive a response.

To ensure success, please note the following:

• To be sure a request is idempotent, you must generate and provide an idempotency key formatted as a GUID.
• Subsequent requests with the same idempotencyKey parameter value will produce the same result as the initial request.
• The idempotencyKey body parameter must be sent in UUID format.

Operations that support idempotency

The following Circle API operations support idempotent requests. Check the API reference for more details.

• Core Functionality

  • Create a payout.
  • Create a wire bank account.
  • Create a business transfer.
  • Create a deposit address.
  • Create a recipient address.

• Payments API

  • Create a payment intent.
  • Expire a payment intent.
  • Refund a payment intent.

• Payouts API

  • Create a payout.
  • Create a recipient address.

• Accounts API

  • Create a sub-account.
  • Create a blockchain address.
  • Create a transfer.