Error Codes & Troubleshooting

Response Format

All v2 error responses follow this shape:

{
  "code": "QUOTE_OVER_LIMIT",
  "message": "Unable to perform exchange, quote over 100000 USD",
  "requestId": "94eb4a6f-12ca-4f22-9d0c-7ffd65ace1c7"
}

Field	Type	Description
`code`	string	Machine-readable error code (stable enum value). Match on this field.
`message`	string	Human-readable description. May contain dynamic values — use regex if needed.
`requestId`	string	Unique request identifier for support/debugging.

Always match on the code string, not the HTTP status or message text. The code values are a stable enum and won’t change without a breaking version bump.

Special Response Shapes

Validation errors include a fields object with per-field details:

{
  "code": "VALIDATION_ERROR",
  "message": "Validation Failed",
  "requestId": "...",
  "fields": {
    "amount": {
      "message": "Amount must be positive",
      "value": -5
    }
  }
}

Rate limit errors include retry metadata:

{
  "code": "RATE_LIMIT_EXCEEDED",
  "message": "FREE tier: 20 quote requests per minute. Try again in 45 seconds.",
  "requestId": "...",
  "retryAfter": 45,
  "meta": {
    "retryAfter": 45,
    "limit": 20,
    "windowType": "minute",
    "operationType": "quote",
    "tier": "free"
  }
}

Error Codes by Endpoint

`GET /v2/quotes`

HTTP	Code	Message	Notes
422	`VALIDATION_ERROR`	Validation Failed	Missing/invalid params. Includes `fields` object.
422	`QUOTE_OVER_LIMIT`	Dynamic max value.
422	`AMOUNT_TOO_LOW`	Dynamic min value.
422	`UNSUPPORTED_FROM_TOKEN`	Unsupported `from` Token	Token ID not found or disabled.
422	`UNSUPPORTED_TO_TOKEN`	Unsupported `to` Token	Token ID not found or disabled.
422	`TO_AND_FROM_CANNOT_BE_THE_SAME`	`to` and `from` cannot be both the same token
422	`UNSUPPORTED_ANON_TOKEN`	Unsupported `anonymousToken`	Invalid intermediary token for private quotes.
422	`SWAP_AMOUNT_IS_OUT_OF_BOUNDS`	Provider-level min/max exceeded.
422	`XMR_SWAP_AMOUNT_IS_OUT_OF_BOUNDS`	Private swap intermediary bounds exceeded.
429	`RATE_LIMIT_EXCEEDED`	Includes `retryAfter` and `meta`.
503	`PRICE_QUOTES_NOT_RETRIEVED`	Could not retrieve price quotes. Try to use a different amount or a different pair. If using Private mode, try Semi-Private	All providers failed to return quotes.
503	`ANONYMOUS_DISABLED`	Anonymous exchanges are temporarily disabled. Please contact support for more details!	Feature flag is off.
500	`INTERNAL_SERVER_ERROR`	Internal Server Error	Catch-all for unexpected errors.

`POST /v2/exchanges`

HTTP	Code	Message	Notes
422	`VALIDATION_ERROR`	Validation Failed	Missing/invalid body fields. Also: expired quote (message includes max age).
422	`INVALID_QUOTE`	Invalid Quote	Quote not found, expired, or wrong type.
422	`INVALID_PATH`	Path is invalid	The swap route/path from the quote is invalid or unavailable.
422	`ADDRESS_TO_INVALID`	addressTo is invalid	Generic address validation failure.
422	`ADDRESS_TO_INVALID_FOR_CHAIN`	Chain-specific address validation failure.
422	`ADDRESS_FROM_INVALID`	addressFrom is invalid	Missing or invalid source address (required for DEX).
422	`ADDRESS_FROM_INVALID_FOR_CHAIN`	Chain-specific source address validation failure. `{type}` is “from” or “to”.
422	`ADDRESS_TO_IN_DEPOSIT_LOG`	addressTo cannot be used as it exists in deposit log	Address reuse prevention.
422	`ADDRESS_TO_IS_TOKEN_ADDRESS`	addressTo cannot be a token contract address	Sending to a contract address is blocked.
422	`X_ADDRESS_NOT_SUPPORTED`	X-Address not supported yet!	XRP X-format addresses not supported.
422	`REUSED_DEPOSIT_ADDRESS`	Deposit address collision detected.
422	`SWAP_AMOUNT_IS_OUT_OF_BOUNDS`	Provider-level bounds exceeded at exchange time.
422	`XMR_SWAP_AMOUNT_IS_OUT_OF_BOUNDS`	Private swap intermediary bounds exceeded.
422	`TOKEN_DISABLED`	Token was disabled between quote and exchange.
422	`INVALID_SWAP`	Unknown or disabled swap provider.
422	`ORDER_ALREADY_INITIALIZING_OR_PROCESSED`	Order already INITIALIZING or processed	Duplicate exchange attempt.
422	`REFUND_ADDRESS_REQUIRED_FOR_FIXED_RATE`	Refund address is required for fixed rate exchanges	`refundAddress` was omitted when using a `fixed=true` quote. Always include it for fixed rate orders.
422	`FIXED_RATE_QUOTE_EXPIRED`	Fixed rate quote has expired	`validUntil` has passed, or the provider lost fixed-rate capability after the quote was issued. Re-fetch a new quote.
422	`ANONYMOUS_AND_FIXED_RATE_NOT_SUPPORTED`	Anonymous and fixed rate are not supported together	Cannot combine `fixed=true` with private/anonymous routing. Use a standard quote instead.
422	`DEX_AND_FIXED_RATE_NOT_SUPPORTED`	DEX and fixed rate are not supported together	Cannot use `fixed=true` with DEX quotes. Fixed rate is only available for standard (CEX) swaps.
429	`RATE_LIMIT_EXCEEDED`	(same pattern as quotes)	Includes `retryAfter` and `meta`.
500	`UNABLE_TO_PERFORM_EXCHANGE`	Unable to perform exchange, no available paths	All providers failed during execution.
503	`ANONYMOUS_DISABLED`	Anonymous exchanges are temporarily disabled…	Feature flag is off.
404	`NOT_FOUND`	Not found	Post-creation order lookup failed (edge case).
500	`INTERNAL_SERVER_ERROR`	Internal Server Error	Catch-all.

`GET /v2/orders/{houdiniId}` and `GET /v2/orders`

HTTP	Code	Message	Notes
404	`NOT_FOUND`	Not found	Order doesn’t exist or belongs to a different partner.
422	`VALIDATION_ERROR`	Validation Failed	Invalid query parameters.
429	`RATE_LIMIT_EXCEEDED`	(same pattern)
500	`INTERNAL_SERVER_ERROR`	Internal Server Error	Catch-all.

Global Errors (all endpoints)

These can be returned by any endpoint:

HTTP	Code	Message	Notes
400	`MISSING_API_CREDENTIALS`	Missing API credentials	No `Authorization` header or `partner-id` header provided.
400	`INVALID_API_CREDENTIALS_FORMAT`	Invalid API credentials format	`Authorization` header is malformed (expected `id:secret`).
401	`INVALID_API_CREDENTIALS`	Invalid API credentials	Credentials don’t match any active partner.
401	`AUTHENTICATION_FAILED`	Authentication failed	Auth check threw an unexpected error.
401	`INVALID_SECURITY_SCHEME`	Invalid security scheme	Request used an unsupported authentication method. Internal safeguard — should not occur in normal usage.
403	`ACCESS_DENIED`	Access restricted for partner-id requests	Operation not allowed for public `partner-id` access.
404	`ROUTE_NOT_FOUND`	Route not found	The requested URL path doesn’t match any v2 endpoint.
429	`RATE_LIMIT_EXCEEDED`	(dynamic — see special shape above)	Per-partner, per-operation rate limits.
503	`SERVICE_UNAVAILABLE`	Service Unavailable	Backend service is temporarily unavailable.
500	`INTERNAL_SERVER_ERROR`	Internal Server Error	Unhandled exception.

HTTP Status Summary

Status	Meaning	Code Strings
400	Bad Request	`MISSING_API_CREDENTIALS`, `INVALID_API_CREDENTIALS_FORMAT`
401	Unauthorized	`INVALID_API_CREDENTIALS`, `AUTHENTICATION_FAILED`, `INVALID_SECURITY_SCHEME`
403	Forbidden	`ACCESS_DENIED`
404	Not Found	`NOT_FOUND`, `ROUTE_NOT_FOUND`
422	Unprocessable Entity	`VALIDATION_ERROR`, `QUOTE_OVER_LIMIT`, `AMOUNT_TOO_LOW`, `UNSUPPORTED_FROM_TOKEN`, `UNSUPPORTED_TO_TOKEN`, `TO_AND_FROM_CANNOT_BE_THE_SAME`, `UNSUPPORTED_ANON_TOKEN`, `SWAP_AMOUNT_IS_OUT_OF_BOUNDS`, `XMR_SWAP_AMOUNT_IS_OUT_OF_BOUNDS`, `ADDRESS_TO_INVALID`, `ADDRESS_TO_INVALID_FOR_CHAIN`, `ADDRESS_FROM_INVALID`, `ADDRESS_FROM_INVALID_FOR_CHAIN`, `ADDRESS_TO_IN_DEPOSIT_LOG`, `ADDRESS_TO_IS_TOKEN_ADDRESS`, `X_ADDRESS_NOT_SUPPORTED`, `REUSED_DEPOSIT_ADDRESS`, `TOKEN_DISABLED`, `INVALID_SWAP`, `ORDER_ALREADY_INITIALIZING_OR_PROCESSED`, `INVALID_QUOTE`, `INVALID_PATH`, `REFUND_ADDRESS_REQUIRED_FOR_FIXED_RATE`, `FIXED_RATE_QUOTE_EXPIRED`, `ANONYMOUS_AND_FIXED_RATE_NOT_SUPPORTED`, `DEX_AND_FIXED_RATE_NOT_SUPPORTED`
429	Too Many Requests	`RATE_LIMIT_EXCEEDED`
500	Internal Server Error	`INTERNAL_SERVER_ERROR`, `UNABLE_TO_PERFORM_EXCHANGE`
503	Service Unavailable	`SERVICE_UNAVAILABLE`, `PRICE_QUOTES_NOT_RETRIEVED`, `ANONYMOUS_DISABLED`

Best Practices

Match on code, not message — The code field is a stable string enum. Messages may contain dynamic values and can change without notice.
Use regex for dynamic messages — For codes like QUOTE_OVER_LIMIT, AMOUNT_TOO_LOW, SWAP_AMOUNT_IS_OUT_OF_BOUNDS, extract the dynamic part with a regex:
/Unable to perform exchange, quote over (\d+) USD/ /Amount is too low, minimum is ([\d.]+) USD/
Handle 422 as your primary error status — Most business logic errors return 422, not 400 or 500.
Respect retryAfter — On 429 responses, wait the specified number of seconds before retrying. The meta object provides additional context about which limit was hit.
Log requestId — Always log the requestId from error responses. Include it when contacting support for faster debugging.
Implement exponential backoff for 500/503 — These are transient errors. Retry with backoff (e.g. 1s, 2s, 4s) up to 3 attempts.
Don’t retry 422 errors — These are deterministic. The same request will produce the same error. Fix the input before retrying.

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API v2 Reference

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Overview

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Troubleshooting

Partner Operations

Response Format

Special Response Shapes

Error Codes by Endpoint

`GET /v2/quotes`

`POST /v2/exchanges`

`GET /v2/orders/{houdiniId}` and `GET /v2/orders`

Global Errors (all endpoints)

HTTP Status Summary

Best Practices

Need Help?

API v2 Reference

Order Lifecycle

Quick Start

Contact Support

​Response Format

​Special Response Shapes

​Error Codes by Endpoint

​GET /v2/quotes

​POST /v2/exchanges

​GET /v2/orders/{houdiniId} and GET /v2/orders

​Global Errors (all endpoints)

​HTTP Status Summary

​Best Practices

​Need Help?

API v2 Reference

Order Lifecycle

Quick Start

Contact Support

Response Format

Special Response Shapes

Error Codes by Endpoint

`GET /v2/quotes`

`POST /v2/exchanges`

`GET /v2/orders/{houdiniId}` and `GET /v2/orders`

Global Errors (all endpoints)

HTTP Status Summary

Best Practices

Need Help?