Retell AI Upgrade Migration

Overview

Implementation patterns for Retell AI upgrade migration — 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 upgrade migration

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

Upgrade an SDK through a compatibility canary

Pin the candidate SDK version in a branch and run the development agent suite against synthetic create-call, retrieval, error, and webhook scenarios. Record the old and new package versions and any changed request shapes, then deploy a preview configuration before altering production dependencies. Keep the prior lockfile and agent version available until the canary has met its error and latency limits, so rollback does not require reconstructing the old runtime.

Resources

Next Steps

See related Retell AI skills for more workflows.