Error codes

On failure the envelope carries data: null and a code from the list below. Branch on the code; the HTTP status is only a hint.

Every endpoint in the API Explorer lists the codes that endpoint can return, under its responses. This page is the union of all of them.

Errors every endpoint can return

Code	HTTP	When
INVALID_REQUEST_DATA	400	Request validation failed — a field is missing, malformed, or unknown.
INTERNAL_SERVER_ERROR	500	Unexpected server error. An internal alert is raised; retry is safe for reads.

ACCESS_TOKEN_INVALID (401) can be returned by every authenticated endpoint — the token is missing, invalid, or expired. The open endpoints listed under Authentication never return it.

Your account

These say something about you, not about the request. They will keep failing until you fix the account, so do not retry them in a loop.

Code	HTTP	When
INVALID_SIGNATURE	401	The client assertion's signature or claims are invalid, or the assertion is stale.
PARTNER_NOT_FOUND	404	The partner for this token no longer exists.
PARTNER_ACCOUNT_LOCKED	403	The partner account is locked.
PARTNER_IP_NOT_ALLOWED	403	The caller IP is not in your allowlist.
PARTNER_INSUFFICIENT_BALANCE	402	Your crypto fund cannot cover the order. Top the fund up.
USER_EMAIL_INVALID	400	userEmail is missing or malformed.

The user and their KYC

A user must be verified before they can transact. See KYC.

Code	HTTP	When
USER_REGISTRATION_REQUIRED	400	The user is not registered.
USER_KYC_VERIFICATION_REQUIRED	400	The user does not exist, has no KYC profile, or KYC is not verified.
USER_KYC_UNDER_PROCESSING	400	A KYC submission is already being processed.
KYC_PROFILE_UNDER_REVIEW	400	The KYC profile is pending review — the user cannot transact yet.
KYC_PROFILE_NOT_ELIGIBLE	400	The KYC profile was rejected.
KYC_DOCUMENT_ALREADY_REGISTERED	400	KYC is already verified, or the national ID belongs to another profile.
KYC_DOCUMENT_FORMAT_INVALID	400	One or more document images are not valid base64 data URLs.
HIGHER_KYC_LEVEL_REQUIRED	400	The service needs a higher KYC level than the user holds.
NATIONALITY_NOT_SUPPORTED	400	The user's nationality is missing, or not supported for this service.
HIGH_RISK_USER	400	The user is flagged as high risk.
REQUESTED_INFO_NOT_FOUND	404	No KYC profile exists for this user yet.

The recipient and the payout

Code	HTTP	When
BANK_NOT_SUPPORTED	400	The bank code is not active. Fetch the current bank list.
INVALID_BANK_ACCOUNT	400	The bank account could not be verified.
HIGH_RISK_BANK_ACCOUNT	400	The recipient account or name is flagged as high risk.
INVALID_TRANSFER_CONTENT	400	The transfer description is invalid.
FIAT_CURRENCY_NOT_SUPPORTED	400	The fiat currency is not supported.
PAYMENT_CHANNEL_NOT_SUPPORTED	400	No payment channel is available for this fiat currency.
QR_CODE_NOT_SUPPORTED	400	No supported format could decode the QR code.
INVALID_PAYMENT_INFO	400	A PHP QR payout is missing the additionalData from the QR decoding step. Pass it through verbatim.
INVALID_WALLET_ADDRESS	400	The wallet address is invalid for the given network.
TOKEN_NOT_SUPPORTED_ON_NETWORK	400	The crypto currency is not supported on the given network.

Amounts and limits

Code	HTTP	When
BUY_AMOUNT_BELOW_MIN	400	The crypto amount is below the minimum.
BUY_AMOUNT_ABOVE_MAX	400	The crypto amount is above the maximum.
SELL_AMOUNT_BELOW_MIN	400	The fiat or crypto amount is below the minimum.
SELL_AMOUNT_ABOVE_MAX	400	The fiat or crypto amount is above the maximum.
AMOUNT_OUT_OF_RANGE	400	The fiat amount is below the minimum allowed for this payout.
TRANSACTION_AMOUNT_LIMIT_EXCEEDED	400	The per-transaction amount limit was exceeded.
DAILY_AMOUNT_LIMIT_EXCEEDED	400	The daily amount or transaction-count limit was exceeded.
WEEKLY_AMOUNT_LIMIT_EXCEEDED	400	The weekly amount limit was exceeded.
MONTHLY_AMOUNT_LIMIT_EXCEEDED	400	The monthly amount limit was exceeded.

The bounds themselves come back on every quote as minAmount and maxAmount — check against those before you create the order, and you will rarely see these.

Orders

Code	HTTP	When
DUPLICATE_TRANSACTION_ID	409	The orderId already exists for your partner account.
TRANSACTION_NOT_FOUND	404	No order matches that orderId for your partner account.
TRANSACTION_CREATE_FAILED	500	The payout could not be completed after the order was created. The order is already refunded.
WEBHOOK_SECRET_NOT_FOUND	400	The webhookSecretKey matches no registered webhook endpoint.

DUPLICATE_TRANSACTION_ID usually means your retry worked the first time. Fetch the order rather than treating it as a failure — see Scan-to-Pay & Cashout.

Temporary

These are the only codes worth retrying with backoff.

Code	HTTP	When
SERVICE_NOT_AVAILABLE	503	The service is not available for your account or the requested currency.
SERVICE_UNDER_MAINTENANCE	503	Pricing is temporarily unavailable for this currency.