Retell AI Local Dev Loop
Overview
Implementation patterns for Retell AI local dev loop — 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 local dev loop
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
Iterate on a prompt with a deterministic local test set
Keep a small suite of synthetic caller intents, including a successful request,
an unclear request, and a required human handoff. Run that suite against a
development agent after each prompt or tool-schema change and compare only
redacted outcomes such as route, tool arguments, and completion state. Do not
point local development at a production phone number; publish a versioned
preview only after the suite continues to meet its expected behavior.
Resources
Next Steps
See related Retell AI skills for more workflows.
