Copper API limits the number of API requests. If the limit is exceeded, the request processing for the IP address or UserID is blocked for the specified lockout period and Copper API returns 429 - Too Many Requests error.

Rate limit typeLimitLockout period
Any HTTP requests30000 requests per 5 minutes for a single IP addressUntil the number of requests in the last 5 minutes is less than 30000
Any HTTP requests15000 requests per hour for a single user30 minutes
Authorization errors (wrong API key or signature)200 failed requests per 1 hour for a single IP address1 hour
Authorization errors (wrong API key or signature)30 failed requests per 1 hour for a single API Key1 hour
Failed API requests (any business logic errors - bad request, missed required parameters, wrong amounts, currencies, etc)60 requests per 1 minute for a single User ID3 minutes

Some requests may have additional limitations, which are not disclosed.