Always use HTTPS when calling the API. Non-TLS HTTP requests cause error 301 to be returned. Using non-TLS requests can leak your authentication credentials.

Rate Limiting

As a protection mechanism to prevent abuse of our API, we have several rate limits for different endpoints.
For our wallet generation, POST requests to this endpoint:<user_id>/wallets/<currency>/addresses are restricted to 20 requests per second.

For all other endpoints, we limit the total number of calls to 300 requests per minute
A good way to handle limits is to queue the requests and send them in batches or build a retry mechanism around the 444 status codes when received.