Help Centre
Help Centre
Guides for getting the most out of the API.
Getting started
New to CallRolin? Create an account, generate an API key from the dashboard, and send your first TTS or STT request — see the Docs → Getting Started guide. CallRolin supports Urdu, Arabic, and English.
Billing & plans
Plans: Starter ($99/mo, 3,000 min), Business ($249/mo, 12,000 min), Enterprise (custom). Usage is measured in minutes of audio — generated for TTS, processed for STT. Usage beyond your included minutes is billed at your plan's overage rate (Starter $0.04/min, Business $0.035/min). Payments are handled by Paddle, our Merchant of Record. Manage or cancel your subscription anytime from the dashboard; cancellation takes effect at the end of the current billing period. All subscription fees are non-refundable — evaluate the free live demo and playground before subscribing.
API keys & authentication
Generate keys under Settings → API Keys and pass them as Authorization: Bearer YOUR_API_KEY. Keep keys secret; revoke and regenerate immediately if a key is exposed. Key limits: Starter 2, Business 10, Enterprise unlimited.
Troubleshooting
401 Unauthorized — check your API key and the Authorization header format. 429 Too Many Requests — you've hit your plan's concurrency limit; retry with backoff or upgrade. Poor audio / transcript quality — confirm the correct language code and clean input audio; test in the playground. Latency higher than expected — use the streaming endpoints for real-time use cases.
Contact support
Email hello@callrolin.com. Business plans get priority response (within 1 business day); Enterprise plans include dedicated support.