Overview
Implementation patterns for Retell AI performance tuning — voice agent and telephony platform.
Prerequisites
- Completed
retellai-install-authsetup
Instructions
Step 1: SDK Pattern
import Retell from 'retell-sdk';
const retell = new Retell({ apiKey: process.env.RETELL_API_KEY! });
const agents = await retell.agent.list();
console.log(Agents: ${agents.length});
## Output
- Retell AI integration for performance tuning
## Error Handling
| Error | Cause | Solution |
|-------|-------|----------|
| 401 Unauthorized | Invalid API key | Check RETELL_API_KEY |
| 429 Rate Limited | Too many requests | Implement backoff |
| 400 Bad Request | Invalid parameters | Check API documentation |
## Examples
### Improve response latency with a measured canary
Capture baseline end-to-end latency, model latency, transfer outcome, and
completion rate for a synthetic test suite before changing an agent setting.
Apply one prompt, model, or integration change to a preview version and repeat
the same suite. Promote to a small canary only if latency improves without a
drop in completion or an increase in handoffs; otherwise restore the prior
version and retain the comparison as the performance decision record.
## Resources
- [Retell AI Documentation](https://docs.retellai.com)
- [retell-sdk npm](https://www.npmjs.com/package/retell-sdk)
## Next Steps
See related Retell AI skills for more workflows.