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skills/justin322322/ghl-skills/GHL API v2 & Integrations

GHL API v2 & Integrations

SKILL.md

GHL API v2 & Integrations

Overview

GoHighLevel's API v2 is a RESTful API providing programmatic access to the platform's features. It enables custom integrations, workflow automation, data syncing, and building marketplace applications.

Important: API v1 is deprecated. All new development should use API v2.

Authentication

OAuth 2.0 (Authorization Code Grant)

Used for Marketplace Apps and multi-location integrations.

Flow:

1. User clicks "Install" on your marketplace app
2. Redirect to GHL authorization URL
3. User grants permission
4. Receive authorization code
5. Exchange code for access_token + refresh_token
6. Use access_token in API calls
7. Refresh token before expiry

Authorization URL:

https://marketplace.gohighlevel.com/oauth/chooselocation
  ?response_type=code
  &redirect_uri={YOUR_REDIRECT_URI}
  &client_id={YOUR_CLIENT_ID}
  &scope={SCOPES}

Token Exchange:

POST https://services.leadconnectorhq.com/oauth/token
Content-Type: application/x-www-form-urlencoded

client_id={CLIENT_ID}
&client_secret={CLIENT_SECRET}
&grant_type=authorization_code
&code={AUTH_CODE}
&redirect_uri={REDIRECT_URI}

Token Refresh:

POST https://services.leadconnectorhq.com/oauth/token
Content-Type: application/x-www-form-urlencoded

client_id={CLIENT_ID}
&client_secret={CLIENT_SECRET}
&grant_type=refresh_token
&refresh_token={REFRESH_TOKEN}

Private Integration Token

Used for single-location or internal integrations (no OAuth flow needed).

  1. Go to Settings → Integrations → Private Integrations in your sub-account
  2. Create a new integration
  3. Select required scopes
  4. Copy the generated API key

Usage:

GET https://services.leadconnectorhq.com/contacts/
Authorization: Bearer {PRIVATE_TOKEN}
Version: 2021-07-28

Rate Limits

Limit Type Value
Burst 100 requests per 10 seconds
Daily 200,000 requests per day
Scope Per marketplace app, per resource (Location or Company)

Rate limit headers are returned in API responses:

X-RateLimit-Limit: 100
X-RateLimit-Remaining: 87
X-RateLimit-Reset: 1639159200

Best Practice: Implement exponential backoff when receiving 429 Too Many Requests.

API Endpoint Reference

Contacts

Method Endpoint Description
GET /contacts/{contactId} Get a contact by ID
GET /contacts/ Search/list contacts
POST /contacts/ Create a new contact
PUT /contacts/{contactId} Update a contact
DELETE /contacts/{contactId} Delete a contact
POST /contacts/{contactId}/tags Add tags
DELETE /contacts/{contactId}/tags Remove tags
GET /contacts/{contactId}/tasks Get contact tasks
GET /contacts/{contactId}/notes Get contact notes

Conversations

Method Endpoint Description
GET /conversations/{conversationId} Get conversation
GET /conversations/search Search conversations
POST /conversations/messages Send a message
GET /conversations/{id}/messages Get messages in conversation
PUT /conversations/{id}/messages/{messageId}/status Update message status

Calendars & Appointments

Method Endpoint Description
GET /calendars/ List calendars
GET /calendars/{calendarId} Get calendar
POST /calendars/ Create calendar
PUT /calendars/{calendarId} Update calendar
GET /calendars/{calendarId}/free-slots Get available slots
GET /calendars/events List appointments
POST /calendars/events Book appointment
PUT /calendars/events/{eventId} Update appointment

Opportunities

Method Endpoint Description
GET /opportunities/search Search opportunities
GET /opportunities/{id} Get opportunity
POST /opportunities/ Create opportunity
PUT /opportunities/{id} Update opportunity
DELETE /opportunities/{id} Delete opportunity
PUT /opportunities/{id}/status Update status (won/lost/open)
GET /opportunities/pipelines List pipelines

Payments

Method Endpoint Description
GET /payments/orders List orders
GET /payments/orders/{orderId} Get order details
GET /payments/subscriptions List subscriptions
GET /payments/transactions List transactions
POST /payments/custom-provider/ Create custom payment provider

Workflows

Method Endpoint Description
GET /workflows/ List workflows
POST /contacts/{contactId}/workflow/{workflowId} Add contact to workflow
DELETE /contacts/{contactId}/workflow/{workflowId} Remove contact from workflow

Other Endpoints

  • Users: CRUD for agency/location users
  • Locations: Manage sub-accounts
  • Forms: List and retrieve form submissions
  • Surveys: List and retrieve survey submissions
  • Businesses: Manage business profiles
  • Social Planner: Schedule and manage social posts
  • Media: Upload and manage files
  • Custom Fields / Custom Values: CRUD operations

Webhooks

Webhooks push real-time event data to your application.

Setup

  1. Go to Settings → Integrations → Webhooks in your sub-account
  2. Add a webhook URL
  3. Select events to subscribe to

Key Webhook Events

Event Description
ContactCreate New contact created
ContactUpdate Contact record updated
ContactDelete Contact deleted
ContactTagUpdate Tag added or removed
ConversationUnreadUpdate New unread message
InboundMessage Incoming SMS, email, or chat
OutboundMessage Outgoing message sent
AppointmentCreate New appointment booked
AppointmentUpdate Appointment rescheduled/cancelled
OpportunityCreate New opportunity created
OpportunityStageUpdate Opportunity moved to new stage
OpportunityStatusUpdate Opportunity won/lost/abandoned
TaskCreate New task assigned
NoteCreate New note added
FormSubmission Form submitted
SurveySubmission Survey completed

Webhook Payload Example

{
  "type": "ContactCreate",
  "locationId": "loc_abc123",
  "id": "contact_xyz789",
  "firstName": "John",
  "lastName": "Doe",
  "email": "john@example.com",
  "phone": "+15551234567",
  "tags": ["new-lead", "source:facebook"],
  "dateAdded": "2025-01-15T10:30:00Z"
}

Best Practices

  1. Respond with 200 quickly — Process webhook data asynchronously
  2. Validate payloads — Check for required fields before processing
  3. Handle duplicates — Implement idempotency for webhook handlers
  4. Log everything — Store raw payloads for debugging
  5. Set up retry logic — GHL retries failed webhook deliveries

Building Marketplace Apps

Steps

  1. Create a developer account at marketplace.gohighlevel.com
  2. Register your app — Set redirect URIs, scopes, and app details
  3. Implement OAuth 2.0 — Handle auth flow, token storage, and refresh
  4. Build your integration — Use API endpoints to interact with GHL data
  5. Submit for review — GHL reviews before publishing to the marketplace
  6. Maintain and update — Monitor for API changes and update accordingly

Required Scopes

Select only the scopes your app needs:

  • contacts.readonly / contacts.write
  • conversations.readonly / conversations.write / conversations/message.readonly / conversations/message.write
  • calendars.readonly / calendars.write / calendars/events.readonly / calendars/events.write
  • opportunities.readonly / opportunities.write
  • locations.readonly / locations.write
  • workflows.readonly
  • users.readonly / users.write
  • payments.readonly / payments.write
  • forms.readonly / surveys.readonly

Integration Patterns

Common Integrations

Tool Pattern
Zapier Use GHL's Zapier app or custom webhooks
Make (Integromat) HTTP module with API endpoints
Google Sheets Native workflow action or API-based sync
Slack Webhook notifications from workflows
Stripe Native integration for payments
WordPress Embed forms, calendars; use tracking code
Shopify Webhook-based order sync
Custom Apps Direct API v2 integration

Data Sync Pattern

External System ←→ Middleware (Node.js/Python) ←→ GHL API v2
                                                    ↕
                                              GHL Webhooks

Error Handling

// Example: Node.js API call with error handling
async function getContact(contactId, token) {
  try {
    const response = await fetch(
      `https://services.leadconnectorhq.com/contacts/${contactId}`,
      {
        headers: {
          Authorization: `Bearer ${token}`,
          Version: "2021-07-28",
        },
      },
    );

    if (response.status === 429) {
      // Rate limited — wait and retry
      const retryAfter = response.headers.get("Retry-After") || 10;
      await sleep(retryAfter * 1000);
      return getContact(contactId, token); // Retry
    }

    if (!response.ok) {
      throw new Error(`API Error: ${response.status} ${response.statusText}`);
    }

    return await response.json();
  } catch (error) {
    console.error("GHL API Error:", error);
    throw error;
  }
}

Key Resources

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Repository
justin322322/ghl-skills
GitHub Stars
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First Seen
Jan 1, 1970