# GoHighLevel API Integration Connect GoHighLevel to VINSI.AI using OAuth 2.0 and expose CRM functionality to AI Phone Agents via Custom API tools. Created: January 26, 2026 ## Overview GoHighLevel provides a REST API that allows access to CRM data such as contacts, opportunities, conversations, and custom fields. VINSI.AI integrates with GoHighLevel using OAuth 2.0, enabling secure, location-scoped access without exposing API keys to agents. ## Authentication GoHighLevel authentication is handled via OAuth 2.0. 1. Navigate to **Settings → API Integration → GoHighLevel** 2. Click **Connect with GoHighLevel API** 3. Select the GoHighLevel location to authorize 4. Approve access to complete the connection Access tokens are stored securely and refreshed automatically. ## GoHighLevel API Once authenticated, GoHighLevel API endpoints can be accessed under: `https://services.leadconnectorhq.com` Example endpoints include: - `/contacts/` — list and manage contacts - `/opportunities/` — CRM pipeline data - `/conversations/` — messages and threads ## Custom API Tool Configuration Add New Tool Go to **Tools → Add Tool** and configure: - **Tool Type:** Custom API - **Tool Name:** GoHighLevel – Get Contacts - **Server URL:** `https://services.leadconnectorhq.com/contacts/` - **Method:** GET - **Headers:** OAuth Authorization (auto-injected) ## Example: Fetch Contacts GoHighLevel Custom API Tool Server URL: https://services.leadconnectorhq.com/contacts/ Method: GET This tool can be invoked by AI agents during a call to retrieve CRM contact data in real time. ## Important Notes - Access is scoped per GoHighLevel location. - OAuth tokens are automatically refreshed. - GoHighLevel enforces rate limits per account. - Custom API tools should be narrowly scoped per use case.