How to connect your App to the Contacts API

Connect your app with the Contacts API to surface verified reviews efficiently.

How to connect the Contacts API with your app

This guide walks you through authentication, endpoint requests, and data handling for verified reviews via the Contacts API.

GHL Contacts API Authentication

Authenticate with OAuth 2.0 using your app credentials and request the contacts.readonly scope to access contact data safely.

App Authentication

Your app authenticates by obtaining an access token and including it in the Authorization header as a Bearer token for each request.

Verified Reviews Endpoints

GET /contacts/:contactId GET /contacts/:contactId/tasks GET /contacts/:contactId/tasks/:taskId GET /contacts/:contactId/notes GET /contacts/:contactId/notes/:id GET /contacts/:contactId/appointments GET /contacts/ GET /contacts/business/:businessId contacts.write POST /contacts/ PUT /contacts/:contactId DELETE /contacts/:contactId POST /contacts/:contactId/tasks PUT /contacts/:contactId/tasks/:taskId PUT /contacts/:contactId/tasks/:taskId/completed DELETE /contacts/:contactId/tasks/:taskId POST /contacts/:contactId/tags

Top 3 connection patterns between GHL and your App for Verified Reviews

1) Read-only lookup with enrichment

Trigger on contact events to fetch details via GET /contacts/:contactId and pull notes, tasks, and appointments.

Actions: retrieve contact data, pull latest notes and tasks, and display verified review status in your app.

GET /contacts/:contactId to pull core profile data; GET /contacts/:contactId/tasks and /notes for history.

key fields: contactId, verifiedStatus, reviewScore, lastUpdated

Top 3 connection patterns between GHL and your App for Verified Reviews

2) Create or update contacts with new verified reviews

Trigger on new verified reviews to refresh contact data.

Actions: POST /contacts/ or PUT /contacts/:contactId to sync updated information.

POST /contacts/ or PUT /contacts/:contactId

fields: contactId, businessId, reviewStatus, verifiedAt

Top 3 connection patterns between GHL and your App for Verified Reviews

3) Task-driven verification workflow

Trigger on new tasks tied to verification status.

Actions: POST /contacts/:contactId/tasks, update task status to reflect review progress.

POST /contacts/:contactId/tasks

fields: contactId, taskId, status, dueDate

No-code benefits with GHL and your App

Speed: build automations and data flows without writing code.

Reliability: rely on standardized API calls and consistent data structures.

Scalability: handle growing verified review data as your app expands.

Key Terms and Glossary

Core elements include endpoints, triggers, actions, and fields used to work with Verified Reviews in the Contacts API.

OAuth 2.0

OAuth 2.0 is an authorization framework that lets apps obtain limited access to an API on behalf of a user.

Bearer Token

A Bearer Token is the access credential sent in the Authorization header to authenticate API requests.

Endpoint

An API Endpoint is a URL that performs a specific function, such as retrieving a contact or listing tasks.

Scope

Scopes define what access your app has to a resource, such as contacts.readonly.

People also Search for:

Creative ideas to maximize use of the Contacts API with Verified Reviews

Idea 1: Auto-tag verified contacts

Automatically tag contacts when a verified review is detected and sync with notes for a complete history.

Idea 2: Review-driven task automation

Create follow-up tasks when reviews reach certain thresholds to nurture relationships.

Idea 3: Centralized contact history

Aggregate contact data, notes, tasks, and reviews into a single, searchable history.

Three simple steps to connect the GHL Contacts API with your App

Step 1: Register your app

Create credentials in your developer portal and configure the OAuth 2.0 redirect URL.

Step 2: Authenticate and authorize

Request an access token with the scope contacts.readonly and obtain refresh tokens as needed.

Step 3: Test and integrate

Test endpoints like GET /contacts/:contactId and GET /contacts/:contactId/tasks in a staging environment before going live.

Frequently Asked Questions

What data can I access with the Contacts API?

With the Contacts API and the contacts.readonly scope, you can retrieve contact details, related tasks, notes, and appointments, along with basic verified review information for display in your app. This is designed for read-only data flow and display. In practice, you can build rich user experiences by surfacing status, dates, and associated notes without allowing data modification.

To authenticate, register your app in the GHL developer console, obtain client credentials, and request an access token with the appropriate scope. Store tokens securely and rotate them as recommended. Include the token in the Authorization header as a Bearer token for each request. Use refresh tokens to maintain long-lived sessions and follow best practices for securely handling credentials.

For verified reviews, focus on endpoints that expose read-only data about contacts and their activity: GET /contacts/:contactId for profile data, GET /contacts/:contactId/notes and GET /contacts/:contactId/tasks for activity history, and GET /contacts/:contactId/appointments for meetings. If you need write capabilities, upgrade to a higher scope; otherwise, these read-only endpoints provide a complete picture of verified reviews without modification.

Creating or updating contacts requires a write-enabled scope (for example, contacts.write). The contacts.readonly scope does not permit write operations. If your app needs to modify data, request the appropriate scope and obtain user consent. Always limit permissions to what your app truly needs and implement proper security measures.

To fetch a contact’s tasks, call GET /contacts/:contactId/tasks. You can retrieve a list of tasks, then drill into a specific task with /contacts/:contactId/tasks/:taskId. Combine the task data with notes (GET /contacts/:contactId/notes) to build a complete activity timeline for each contact.

Rate limits are documented in the GHL API docs and depend on your plan and token. Expect per-minute quotas and shared concurrency limits. Implement exponential backoff and retries to gracefully handle throttling and maintain a smooth user experience.

Common errors include invalid or expired tokens, insufficient scope, and missing required fields. Ensure tokens are current, scopes match the endpoint, and all required parameters are provided. Log errors for monitoring and implement retry logic with backoff to recover from transient issues.

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🚀 GoHighLevel Integration

Complete Operations Catalog - 126 Actions & Triggers

126
Total Operations
55
Polling Triggers
71
Actions
14
Categories
👥

Contacts

10 Triggers 18 Actions
Trigger
Get Contact
Retrieve a specific contact by ID
Trigger
Search Contacts
Advanced search with filters
Trigger
Get Contacts by Business
Retrieve contacts linked to a business
Trigger
Get Duplicate Contact
Check for duplicate contacts
Trigger
Get Contact Appointments
List all appointments for a contact
Trigger
Get Contact Tasks
Retrieve all tasks for a contact
Trigger
Get Contact Task by ID
Get specific task details
Trigger
Get Contact Notes
List all notes for a contact
Trigger
Get Contact Note by ID
Retrieve specific note details
Trigger
List Contacts (Deprecated)
Legacy contact listing method
Action
Create Contact
Add a new contact to the system
Action
Update Contact
Modify existing contact information
Action
Find Contact
Search by email, phone, or ID
Action
Delete Contact
Remove a contact permanently
Action
Upsert Contact
Create or update contact automatically
Action
Add Tags to Contact
Tag contacts for organization
Action
Remove Tags from Contact
Remove specific tags
Action
Bulk Update Contact Tags
Add or remove multiple tags at once
Action
Create Contact Task
Add a new task for a contact
Action
Update Contact Task
Modify existing task details
Action
Complete Contact Task
Mark task as complete
Action
Delete Contact Task
Remove a task permanently
Action
Create Contact Note
Add notes to contact records
Action
Update Contact Note
Edit existing notes
Action
Delete Contact Note
Remove notes from contacts
Action
Add Contact to Campaign
Enroll contact in campaign
Action
Remove from Campaign
Remove contact from specific campaign
Action
Remove from All Campaigns
Unenroll from all campaigns
📅

Calendars & Appointments

13 Triggers 21 Actions
Trigger
List Calendar Groups
Get all calendar groups
Trigger
List Calendars
Retrieve all calendars
Trigger
Get Calendar by ID
Get specific calendar details
Trigger
Get Free Slots
Check calendar availability
Trigger
List Calendar Events
Get all scheduled events
Trigger
List Blocked Slots
View unavailable time slots
Trigger
Get Appointment
Retrieve appointment details
Trigger
List Appointment Notes
Get notes for appointments
Trigger
List Calendar Notifications
View notification settings
Trigger
Get Calendar Notification
Get specific notification
Trigger
List Calendar Resources
View rooms and equipment
Trigger
Get Calendar Resource
Get specific resource details
Action
Create Calendar Group
Set up new calendar group
Action
Update Calendar Group
Modify calendar group settings
Action
Update Group Status
Enable or disable calendar group
Action
Delete Calendar Group
Remove calendar group
Action
Validate Group Slug
Check if slug is available
Action
Create Calendar
Add new calendar
Action
Update Calendar
Modify calendar settings
Action
Delete Calendar
Remove calendar permanently
Action
Create Appointment
Book new appointment
Action
Update Appointment
Modify appointment details
Action
Delete Event
Cancel and remove event
Action
Create Block Slot
Block time on calendar
Action
Update Block Slot
Modify blocked time
Action
Create Appointment Note
Add notes to appointments
Action
Update Appointment Note
Edit appointment notes
Action
Delete Appointment Note
Remove appointment notes
Action
Create Calendar Notification
Set up reminders
Action
Update Notification
Modify notification settings
Action
Delete Notification
Remove notification
Action
Create Calendar Resource
Add room or equipment
Action
Update Calendar Resource
Modify resource details
Action
Delete Calendar Resource
Remove resource
💼

Opportunities

3 Triggers 7 Actions
Trigger
Search Opportunities
Find opportunities with filters
Trigger
Get Opportunity
Retrieve specific opportunity
Trigger
List Pipelines
View all opportunity pipelines
Action
Create Opportunity
Add new sales opportunity
Action
Update Opportunity
Modify opportunity details
Action
Delete Opportunity
Remove opportunity
Action
Update Opportunity Status
Change status (open, won, lost)
Action
Upsert Opportunity
Create or update opportunity
Action
Add Followers
Assign team members to follow
Action
Remove Followers
Unassign followers
👤

Users

4 Triggers 3 Actions
Trigger
Search Users
Find users with filters
Trigger
Filter Users by Email
Search users by email address
Trigger
Get User
Retrieve user details
Trigger
List Users by Location
Get users in specific location
Action
Create User
Add new user to system
Action
Update User
Modify user information
Action
Delete User
Remove user from system
💬

Conversations & Messages

8 Triggers 2 Actions
Trigger
Search Conversations
Find conversations by filters
Trigger
Get Conversation
Retrieve conversation details
Trigger
Get Email by ID
Retrieve specific email
Trigger
Get Message by ID
Get specific message details
Trigger
Get Messages by Conversation
List all conversation messages
Trigger
Get Message Recording
Retrieve voice recording
Trigger
Get Message Transcription
Get transcribed message text
Trigger
Download Transcription
Download transcription file
Action
Update Message Status
Change message read/unread status
Action
Agent Typing Indicator
Show typing indicator in chat
🏢

Businesses

2 Triggers 3 Actions
Trigger
Get Business
Retrieve business details
Trigger
List Businesses by Location
Get all businesses in location
Action
Create Business
Add new business
Action
Update Business
Modify business details
Action
Delete Business
Remove business
🔄

Workflows & Campaigns

3 Triggers 5 Actions
Trigger
List Workflows
Get all workflows
Trigger
List Snapshots
View available snapshots
Trigger
List Campaigns
Get all campaigns
Action
Add Contact to Workflow
Enroll in workflow automation
Action
Remove from Workflow
Unenroll from workflow
Action
Add Contact Followers
Assign followers to contact
Action
Remove Contact Followers
Unassign followers
Action
Bulk Business Update
Add/remove contacts from business
⚙️

Other Operations

20 Triggers 8 Actions
Trigger
List Locations
Get all locations
Trigger
List Custom Fields
View custom field definitions
Trigger
Get Company
Retrieve company information
Trigger
Find Associations
Search associations
Trigger
Get Association
Retrieve association details
Trigger
Get Association Key
Get key by name
Trigger
Get Association by Keys
Find by object keys
Trigger
Get Relations by Record
List record relations
Trigger
Check Blog URL Slug
Verify slug availability
Trigger
Get Blog Authors
List blog authors
Trigger
Get Blog Categories
List blog categories
Trigger
Get Blog Posts
List posts by blog
Trigger
Get Blogs by Location
List location blogs
Action
Find Location by ID
Retrieve location details
Action
Create Location
Add new location
Action
Create Association
Link related records
Action
Update Association
Modify association
Action
Delete Association
Remove association
Action
Create Relation
Establish record relation
Action
Delete Relation
Remove record relation
Action
Create Blog Post
Publish new blog post
Action
Update Blog Post
Edit blog post

✨ Key Capabilities

📊 Contact Management

  • 10 custom field slots per contact
  • Advanced search with filters
  • Duplicate detection
  • Tag management (bulk operations)
  • Full task and note management
  • Campaign & workflow enrollment

📅 Calendar Features

  • Calendar groups with slugs
  • Multiple calendar types
  • Free slot checking
  • Appointment booking system
  • Blocked slots management
  • Room & equipment resources

💼 Sales Pipeline

  • Multi-pipeline support
  • Stage management
  • Status tracking (won, lost, etc)
  • Monetary value tracking
  • User assignment
  • Follower management

🔄 Automation Ready

  • Workflow automation support
  • Campaign management
  • Polling triggers (1-15 min)
  • Real-time conversations
  • Bulk operations
  • Upsert capabilities
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