retellai-reliability-patterns

Retell AI Reliability Patterns

Overview

Implementation patterns for Retell AI reliability patterns — voice agent and telephony platform.

Prerequisites

• Completed retellai-install-auth setup

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 reliability patterns

## 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

### Design a safe fallback for a dependent CRM outage

Give the voice flow a short, explicit timeout for CRM lookup and a fallback
response that either schedules a follow-up or transfers to a human queue. Test
the fallback by making the preview CRM endpoint return a controlled error, then
confirm no call is retried or double-booked. Track the fallback rate separately
from general call failures and remove the temporary routing change only after
the dependency and a synthetic recovery call both succeed.

## 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.