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Concurrency

Concurrency is the number of simultaneous active calls your account can run. Check your current concurrency in GET /user/me:
To increase your concurrency limit, contact support@bolna.ai or upgrade your plan. See Outbound Calling Concurrency for scheduling behavior when the limit is reached.

Rate limits

The API is rate-limited per account. If you exceed the limit you receive HTTP 429. Apply exponential backoff and retry:

Batch limits

CSV requirements

Webhook delivery

Wallet & balance

Calls require wallet credits. A balance-low execution status means the call was not placed due to insufficient balance. Top up from the dashboard or contact support for invoice billing.