This article explains how to connect VAPI provider to HighLevel Voice AI Agents. By adding VAPI you unlock every feature already available through Synthflow and Retell—greeting messages, appointment booking, workflow triggers, dashboards, and more—while benefiting from VAPI’s developer-first API, multilingual speech models, and low-latency WebSocket streaming.

TABLE OF CONTENTS

• What is VAPI Integration?
• How to Add VAPI as a Voice AI Provider
• Advanced Agent Settings
• Supported Actions in VAPI
• Dashboards & Analytics
• Frequently Asked Questions
• Next Steps

What is VAPI Integration?

VAPI is a developer-focused platform for building, testing, and deploying conversational voice agents. Integrating it into HighLevel lets you keep using familiar Voice AI actions while tapping VAPI’s global telephony coverage and highly configurable API. VapiVoice AI Space
 

Key Benefits of VAPI Integration

Knowing the advantages helps you justify the switch and plan resources effectively.

• Feature parity with Synthflow & Retell—no learning curve.
  
  

• Global, multilingual support powered by VAPI’s speech-to-text and text-to-speech pipeline.
  
  

• Low-latency streaming via VAPI WebSocket transport for more natural conversations.
  
  

• Trial-call sandbox so you can iterate safely before going live.
  
  

• Road-mapped enhancements like multiple voice options and snapshot imports ensure long-term scalability.

How to Add VAPI as a Voice AI Provider

Follow these steps to connect VAPI in minutes and start test-dialing with zero risk.

1. Open Settings ▸ Voice AI Providers ➜ Add Provider.
   
   

2. Select VAPI and paste your VAPI API Key (find it in the VAPI dashboard).
   
   

3. Click Verify Connection; a live handshake confirms credentials.
   
   

4. Save—VAPI now appears in your list with status Active.
   
   

5. Create or edit a Voice AI Agent and choose VAPI in the Provider field.
   
   

Basic Agent Setup with VAPI

These core options get your agent on the phone quickly while preserving a consistent caller experience.

• Greeting message
  
  

• Attach single phone number or number pool
  
  

• Enable as backup agent
  
  

• Define working hours

Advanced Agent Settings

Fine-tune conversation flow and personality for brand-perfect calls.

• Response-speed slider
  
  

• Idle-timeout threshold
  
  

• Language selector covering every language already offered by Synthflow & Retell. Vapi
  
  

• Voice-stability percentage
  
  

Supported Actions in VAPI

All automation power you expect—now driven by VAPI’s infrastructure.

Dashboards & Analytics

Monitor live and test activity without leaving HighLevel.

• Separate tiles for Trial Calls and Customer Calls
  
  

• KPIs: average call length, CSAT, extraction accuracy
  
  

• Drill-down: full transcript, AI summary, recording playback
  
  

Frequently Asked Questions

Q 1: Does VAPI cost more than other providers?
 A: Pricing is usage-based and matches Synthflow/Retell tiers; check Billing ▸ Voice AI for exact rates.

Q 2: How many trial calls can I place?
 A: Ten 2-minute calls per location; usage resets every 24 hours.

Q 3: Which languages are supported?
 A: Every language already enabled for Synthflow/Retell—plus any new ones VAPI adds automatically. 

Q 4: When will multiple voices be available?
 A: Targeted for the 2025 Q4 release cycle.

Q 5: Can I switch an existing agent from Synthflow to VAPI?
 A: Yes—edit the agent, change Provider to VAPI, save, and republish.

Q 6: What latency should I expect?
 A: Agents using WebSocket transport typically respond in under a second end-to-end.

Q 7: Are post-call summaries still generated?
 A: Yes—summaries appear in the same Calls dashboard pane.

Q 8: How do I report a provider-specific issue?
 A: Tag your ticket Voice-AI ▸ VAPI in the private support channel for fastest triage.

Next Steps

1. Generate your VAPI API Key and add the provider.
   
   

2. Place a trial call to validate audio and transcript quality.
   
   

3. Map data-extraction fields to your CRM.
   
   

4. Explore advanced actions like Call Transfer and Appointment Booking to maximize automation.