BoldSign has rate limits to balance loads on the system. Both API keys and OAuth API calls follow the same rate limit system. In a live or production environment, you can make up to 2000 requests per hour per account. In sandbox mode, this limit is set at 50 requests per hour per account.
The rate limits are introduced for the account level, not for the OAuth app or user level.
Once the limit is reached, responses with a status of 429 "Too Many Requests" and corresponding messages will be returned. You can track your rate limit usage in the API response headers.