Authenticate API calls with the GHL Contacts API using API keys or OAuth tokens. Specify scopes to limit access to contacts data such as read-only or write permissions.
Your App authenticates to GHL via a client credential flow, keeping secrets secure and using redirect URIs for user consent where needed.
Available endpoints include: 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; write scope: 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
Trigger: When a contact is created or updated (GET /contacts/:contactId) to synchronize local records.
Actions: fetch-and-store contact data, update related records, trigger downstream workflows.
GET /contacts/:contactId
contactId, email, name
Trigger: When a contact’s tasks change (GET /contacts/:contactId/tasks)
Actions: pull task data, reconcile statuses, update UI
GET /contacts/:contactId/tasks
contactId, taskId, status
Trigger: When a specific task is queried or updated (GET /contacts/:contactId/tasks/:taskId)
Actions: pull task details, sync to local task view, trigger reminders
GET /contacts/:contactId/tasks/:taskId
contactId, taskId, dueDate
Faster go-to-market with no-code workflows that sync contact data in real time
Automated data enrichment: notes, tasks, and appointments update automatically
Easier maintenance: centralized configuration reduces custom code
This glossary covers common elements and processes used when integrating GHL Contacts API with your App: endpoints, triggers, actions, and data fields.
A secure string used to authenticate API requests, typically valid for a limited time and scoped to specific permissions.
A specific URL path exposed by the API to perform a function, such as retrieving a contact or updating a task.
An authorization framework that lets apps obtain limited access to user data without sharing passwords, commonly used for API authentication.
A callback URL that allows the API to notify your app when an event occurs, such as a contact update.
Use real-time contact info to streamline user onboarding in your App, triggering welcome flows when a new contact is added in GHL.
Leverage task updates to drive in-app engagement, sending reminders when tasks change status.
Aggregate notes, appointments, and tasks into a single unified contact profile inside your App for richer insights.
Create a new app in your OAuth provider and obtain client credentials to authorize calls to the GHL Contacts API.
Define the scopes (read/write) and the allowed endpoints you will use to access contacts, tasks, notes, and more.
Implement token handling, retries, and error handling; test with sample data to ensure reliable integration.
The GHL Contacts API lets you access contact records, tasks, notes, and appointments. It enables apps to read, create, update, and delete data within your GHL account according to permissions.
Yes. You can set read-only scopes to prevent edits while still syncing data such as contact lists, notes, and activity history.
Common syncing requires endpoints like GET /contacts/:contactId, GET /contacts/:contactId/tasks, and GET /contacts/:contactId/notes to fetch related data.
Webhooks are supported. You can configure callbacks to notice changes in contacts, tasks, notes, and appointments.
Use OAuth 2.0 or API keys, rotate credentials regularly, and store tokens securely with encryption.
If a token expires, use the refresh flow or re-authenticate to obtain a new token.
Endpoint documentation is available in the GHL developer portal and in-app API references.
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