Authenticate using OAuth 2.0 and API keys, ensuring the access token has the scope: contacts.readonly.
Configure OAuth 2.0 for Your App, securely store tokens, and validate token scopes before API calls to the Contacts API.
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, supports: 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: GET /contacts/:contactId
Actions: fetch contact details, and surface related tasks, notes and appointments.
GET /contacts/:contactId
Key fields: contactId, name, email, phone
Trigger: GET /contacts/:contactId/tasks
Actions: retrieve task list and statuses for workflow automation
GET /contacts/:contactId/tasks
Key fields: taskId, title, status, dueDate
Trigger: GET /contacts/:contactId/notes
Actions: pull notes to enrich profiles and support history
GET /contacts/:contactId/notes
Key fields: id, note, createdAt
Real-time access to contact data to power automation and insights in Your App.
Automated task creation and reminders from contact activity.
Centralized data across Your App and GHL for better reporting.
Core elements include endpoints, authentication, fields, and processes for syncing contacts between GHL and Your App.
A person stored in GHL with identifiers like name, email, phone, and interaction history.
A specific URL path that exposes a resource in the GHL API.
Authorization framework used to securely access APIs and obtain access tokens.
Defines the permissions granted to an access token, such as read-only access to contacts.
Set up a webhook to push new contacts into Your App and trigger onboarding tasks.
Create tasks in GHL from app events and sync status back.
Pull notes to enrich profiles and drive proactive engagement.
Create a GHL API key and OAuth client; enable scope contacts.readonly.
Run OAuth flow to obtain tokens and verify endpoints like GET /contacts/:contactId.
Begin pulling contacts and related tasks/notes; map fields to Your App.
The ‘contacts.readonly’ scope allows read access to contact records and related resources using the Contacts API. It enables you to fetch contact details, notes, tasks, and related data for display or analysis. It does not permit modifying data. If you need to write data, request the appropriate scope such as ‘contacts.write’ and obtain approval from your GHL administrator. Once granted, you can perform create, update, and delete operations.
For read-only syncing, focus on endpoints like GET /contacts/:contactId, GET /contacts/:contactId/tasks, and GET /contacts/:contactId/notes to pull data into Your App. If your workflow requires modifying data, plan to use write-enabled endpoints after obtaining the necessary permissions (e.g., POST /contacts/, PUT /contacts/:contactId). Always validate the data mapping to ensure consistency.
Authentication uses OAuth 2.0. Start by creating a client in GHL, obtaining a clientId and clientSecret, and directing your user to authorize access. Exchange the authorization code for an access token, then use that token in API requests. Ensure the token you receive has the correct scope for the operations you intend to perform.
Write operations require a higher scope such as ‘contacts.write’. With the appropriate permissions, you can create, update, and delete contacts, tasks, notes, and tags using the corresponding endpoints. Always follow least-privilege principles and rotate credentials regularly.
Rate limits depend on your GHL plan and the specific endpoint. If you approach the limit, implement exponential backoff and retry logic, and consider caching frequently requested data on the Your App side to reduce repeated calls.
Test the integration using sandbox credentials or a development environment. Validate tokens, confirm scopes, and run sample requests to key endpoints (e.g., GET /contacts/:contactId). Review responses for correctness and handle errors gracefully.
The endpoints list appears in this guide and the developer portal. It covers read and write operations for contacts, tasks, notes, and related resources. For versioning and the most up-to-date paths, consult the official API reference.
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Complete Operations Catalog - 126 Actions & Triggers
