or download this
Making requests to the API
Most API requests need to be encoded with application/x-www-form-urlen
+coded and sent as HTTP GET or POST requests to the appropriate API en
+dpoint. When uploading files multipart/form-data encoding is also sup
+ported. A total of three HTTP header fields are needed:
...
HMAC authentication key.
API endpoint, for example, /api/wallet/.
API arguments encoded as application/x-www-form-urlencoded. Files enco
+ded as multipart/form-data.