Build a GoHighLevel AI Voice Agent That Calls Every Lead in Under 60 Seconds

A Retell AI guide explains how to build a speed-to-lead outbound voice agent that calls GoHighLevel form submissions within seconds, qualifies prospects, checks calendar availability, books appointments, and writes call outcomes back to the CRM. Using a fictional HVAC business, the workflow connects a GoHighLevel lead-capture form, automation webhook, Retell phone agent, and GoHighLevel calendar, with dynamic variables supplying the caller’s name, requested service, ZIP code, and contact ID. The setup requires a GoHighLevel sub-account, Retell account and outbound phone number, API credentials, a configured booking calendar, and correctly formatted E.164 phone numbers, while emphasizing consent and TCPA considerations for U.S. AI calling. Retell’s Conductor tool is used to create the conversational flow, attach native availability and appointment-booking tools, configure post-call analysis, and test scenarios such as successful bookings, wrong numbers, do-not-call requests, booking failures, and unavailable slots before publication. A GoHighLevel workflow then sends form data to Retell’s phone-call API, and users are instructed to verify successful calls by checking the calendar appointment, Retell call history, and contact note, with suggested extensions including outcome tagging, deeper qualification, and follow-up calls for unbooked leads.

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