Responses

Cryptopay API operates HTTP status codes to indicate the status of user’s requests including both successful and unsuccessful responses.
Responses will also include JSON-formatted data for further details:
1xx (Informational): The request is received, continuing process
2xx (Successful): The request is successfully received, understood, and accepted
3xx (Redirection): Further action needs to be taken in order to complete the request
4xx (Client Error): The request contains bad syntax or cannot be fulfilled
5xx (Server Error): The server failed to fulfil an apparently valid request
Status code
Meaning
200 OK
Standard response for successful HTTP requests
201 Created
The request has been fulfilled, resulting in the creation of a new resource
202 Accepted
The request has been accepted for processing, but the processing has not been completed
204 No Content
The server successfully processed the request and is not returning any content
304 Not Modified
Indicates that the resource has not been modified since the version specified by the request headers If-Modified-Since or If-None-Match
400 Bad Request
The server cannot or will not process the request due to an apparent client error (e.g., malformed request syntax, size too large, invalid request message framing, or deceptive request routing)
401 Unauthorized
Most likely you weren't able to construct and sign your API request correctly using HMAC 
403 Forbidden 
You don't have required permissions to perform requested action on the resource. Check your API key whitelist
404 Not Found
We don't have the resource you've requested
409 Conflict
Most likely the custom_id value you are trying to use had been used before
422 Unprocessable Entity
The request was well-formed but was unable to be followed due to semantic errors
500 Internal Server Error
We have a problem with our server
503 Service Unavailable
We are temporarily offline for maintenance

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Status code	Meaning
`200 OK`	Standard response for successful HTTP requests
`201 Created`	The request has been fulfilled, resulting in the creation of a new resource
`202 Accepted`	The request has been accepted for processing, but the processing has not been completed
`204 No Content`	The server successfully processed the request and is not returning any content
`304 Not Modified`	Indicates that the resource has not been modified since the version specified by the request headers If-Modified-Since or If-None-Match
`400 Bad Request`	The server cannot or will not process the request due to an apparent client error (e.g., malformed request syntax, size too large, invalid request message framing, or deceptive request routing)
`401 Unauthorized`	Most likely you weren't able to construct and sign your API request correctly using HMAC
`403 Forbidden`	You don't have required permissions to perform requested action on the resource. Check your API key whitelist
`404 Not Found`	We don't have the resource you've requested
`409 Conflict`	Most likely the `custom_id` value you are trying to use had been used before
`422 Unprocessable Entity`	The request was well-formed but was unable to be followed due to semantic errors
`500 Internal Server Error`	We have a problem with our server
`503 Service Unavailable`	We are temporarily offline for maintenance