Error Codes
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Quick Reference

Code	HTTP Status	Message	Description
400100	400	Order not found.	Order not found.
401000	401	Authentication failed.	Missing authentication header.
401001	401	Authentication failed.	Invalid auth header format.
401400	401	Authentication failed.	API key does not exist.
401410	401	Authentication failed.	API key does not exist.
401416	401	Authentication failed. Invalid nonce.	Nonce invalid, out of bounds, or reused.
500400	500	Authentication failed.	Invalid JSON payload.
500599	500	Unexpected server error.	Internal server error.
510000	500	Unexpected server error.	Internal API error.
515000	500	Unexpected server error.	Core API exception.
520000	500	Unexpected server error.	Asset service error (missing params or DB failure).
530000	500	Unexpected server error.	Pricing service error.
179	503	Service unavailable.	Orders restricted by operator settings.