Key Takeaways
- HighLevel has public API endpoints for Voice AI, split into three groups: dashboard (call logs), agents, and actions.
- You can create, list, update, read and delete voice agents from outside HighLevel, with the same settings you'd fill in by hand.
- Access runs on a private integration token from the sub-account. Give it only the Voice AI scopes it needs and never share it publicly.
- You don't need a separate app to use it. A workflow webhook can call the API, so a form submission can build an agent.
- The bigger play is putting HighLevel's voice agents behind your own web app, mobile app or marketplace app.
Most people build their HighLevel voice agents by clicking through the agent screen. That works fine for one business. It gets old fast when you're setting up agents for ten clients, or when you want your own app to talk to the agent. In a new tutorial from HighLevel, Andrew from the HighLevel team walks through the Voice AI public APIs and what you can build with them. We're On Point Tech Solutions, a Go High Level San Jose consultant based in Los Gatos, and we build voice agents for local businesses, so here's our read on it.
What the Voice AI API Covers
The docs live at marketplace.gohighlevel.com/docs. Click Get Started with API and find Voice AI in the left menu. The endpoints fall into three buckets.
- Dashboard. List call logs for an agent, filtered by agent, contact, call type or action type. Or pull one call log by its call ID. That's where transcripts and call details live.
- Agents. Create, list, patch (update), get and delete agents. Creating one takes the same info you'd enter in the builder: agent name, business name, welcome message, prompt, voice, language, patience level, max call duration, idle reminders, number pool, post-call workflows, notifications, working hours and time zone.
- Actions. Create, update, get and delete the things an agent can do mid-call: transfer the call, trigger a workflow, send a text, extract data. Each action type has its own parameters. A workflow trigger needs a trigger prompt, a message and the workflow ID. A call transfer doesn't need a workflow ID at all.
Andrew's tip for making sense of it: open the agent builder in advanced mode next to the docs. Every field in the API body maps to something you already see on that screen. The API is just a way to fill it in without logging in.
Getting Your Token the Safe Way
Every call needs a bearer token, and that comes from the sub-account. Go to Settings, then Private Integrations, and create a new integration. Then pick your scopes.
This is where people get lazy. You can make one token that touches everything in the account, and Andrew calls that out as risky. For a Voice AI build, pick only the Voice AI scopes: dashboards read, agents read and write, agent goals read and write. Copy the token once it's created, store it somewhere safe, and only hand it to people and systems you trust. Anyone holding it can get into that account.
Using the API Inside a Workflow
Here's the part most HighLevel users skip because it sounds like a developer thing. You can call the API from a regular workflow with a webhook action.
The regular webhook action handles POST and GET. The custom webhook action adds PUT and DELETE and gives you more control over what gets sent. Set the method, paste the endpoint URL, choose bearer token for authorization and add your private integration key, then paste the JSON body from the docs and swap in your own values.
Two examples from the video:
- Update an agent by text. Trigger on a customer reply over SMS, then send a patch to the agent. Change the welcome message from your phone.
- Build an agent from a form. A client fills out a form with their business name, welcome message and prompt. The workflow maps those answers into the create agent call, and the agent shows up in their sub-account without anyone touching the builder.
There is a little code involved. It's mostly copy, paste and map fields, though, and a lot easier than it looks from the outside.
Building Your Own App on Top
The last use case is the one with the most room. You can build a marketplace app that installs into sub-accounts, or you can put HighLevel's voice ecosystem behind a front end you already own, like a web app or a mobile app. Andrew showed a small Voice AI tester app that takes a token and agent ID and runs the endpoints. Your version could let a client see call logs, edit their agent's prompt or pause an action without ever logging into HighLevel.
Why This Matters for Bay Area and San Jose Businesses
A lot of San Jose service businesses already run voice agents to catch after-hours calls. The pain shows up later. The owner wants the greeting changed for a holiday. A new location needs its own agent. An agency is copying the same agent setup across a dozen clients by hand.
The API turns those into repeatable steps. An onboarding form can spin up a starter agent. Call logs can feed a simple report in the tool the owner already checks. And a Bay Area agency selling voice AI can stop rebuilding the same thing every time it signs a client.
If you're a business owner, you don't need to write any of this yourself. It's worth knowing it exists, though, so you can ask whoever builds your system for it.
Practical Steps
- Build one voice agent by hand first so you know every setting the API expects.
- Open marketplace.gohighlevel.com/docs and read the Voice AI dashboard, agents and actions sections.
- Create a private integration with only the Voice AI scopes and store the token safely.
- Test a read-only call first, like get agent or list call logs.
- Try one workflow webhook, such as updating the agent's welcome message.
- Once that works, move to create agent from a form, or a small app for your team.
Watch the Voice AI API Tutorial
Final Thoughts
The Voice AI API doesn't add new powers to your agent. It changes who and what can set it up. Once your agents can be created and edited from a form, a workflow or your own app, voice AI becomes something you can roll out to ten businesses as easily as one. If you want a Go High Level San Jose team to build your voice agents and the automation around them, that's what we do at On Point Tech Solutions. We're a Go High Level consultant in Los Gatos serving San Jose and the whole Bay Area. You own everything we build, and we'll either do it for you or teach your team to run it with an SOP.