Sandbox testing - Karat Help Center

Sandbox lets you build and test your integration without moving real money. To get sandbox access, contact peter@trykarat.com — see Environments. Once sandbox is enabled on your account, you can use a set of pre-configured test recipients. Sending a payout to one of these email addresses drives the payout to a specific outcome.

Simulate payout statuses

Send a payout to one of these recipients to drive it to the corresponding status:

Recipient email	Resulting status
`sandbox+completed@trykarat.com`	Completed
`sandbox+failed@trykarat.com`	Failed
`sandbox+returned@trykarat.com`	Returned
`sandbox+canceled@trykarat.com`	Canceled
`sandbox+pending@trykarat.com`	Pending
`sandbox+created@trykarat.com`	Created
`sandbox+awaiting_acceptance@trykarat.com`	Awaiting acceptance

Simulate errors

Send a payout to one of these recipients to trigger a specific error:

Recipient email	Simulated error
`sandbox+error_insufficient_funds@trykarat.com`	Insufficient funds to cover the payout batch
`sandbox+error_invalid_amount@trykarat.com`	All payout amounts must be greater than zero

Example

curl https://payouts.api.trykarat.com/payments \
  -H "Authorization: Bearer YOUR_SANDBOX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "payouts": [
      { "payeeEmail": "sandbox+completed@trykarat.com", "amount": 25000 }
    ]
  }'

Combine sandbox status recipients with webhooks to verify your payout.updated handler end to end before going live.

Pagination & errors Webhooks

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​Simulate payout statuses

​Simulate errors

​Example

Simulate payout statuses

Simulate errors

Example