Access to the Contacts API requires a valid OAuth token or API key. Always store credentials securely, implement token refresh, and rotate keys periodically to maintain security.
Set up a robust OAuth flow for Your App to authorize calls to the GHL Contacts API. Capture client IDs, secrets, and scopes, and implement secure redirect handling and token management.
1) GET /contacts/:contactId; 2) GET /contacts/:contactId/tasks; 3) GET /contacts/:contactId/tasks/:taskId; 4) GET /contacts/:contactId/notes; 5) GET /contacts/:contactId/notes/:id; 6) GET /contacts/:contactId/appointments; 7) GET /contacts/; 8) GET /contacts/business/:businessId; 9) contacts.write; 10) POST /contacts/; 11) PUT /contacts/:contactId; 12) DELETE /contacts/:contactId; 13) POST /contacts/:contactId/tasks; 14) PUT /contacts/:contactId/tasks/:taskId; 15) PUT /contacts/:contactId/tasks/:taskId/completed; 16) DELETE /contacts/:contactId/tasks/:taskId; 17) POST /contacts/:contactId/tags
Trigger: a new user signs up in Your App.
Actions: Create a contact in GHL via POST /contacts/ and map core fields.
Method: POST /contacts/
Key fields: email, firstName, lastName, phone
Trigger: Your App updates a contact’s profile.
Actions: PUT /contacts/:contactId to reflect changes; optionally update related notes.
Method: PUT /contacts/:contactId
Key fields: contactId, email, phone
Trigger: a new task or note is created in Your App.
Actions: POST /contacts/:contactId/tasks and POST /contacts/:contactId/notes as appropriate.
Method: POST /contacts/:contactId/tasks
Key fields: contactId, taskTitle, noteContent
Automate data flows between Your App and the Contacts API without custom development.
Achieve real-time data synchronization to reduce manual data entry and errors.
Improve onboarding speed and ensure consistent contact, task, and note histories.
Key elements include endpoints, authentication, triggers, and actions; processes describe how data moves between Your App and GHL via the Contacts API.
A set of rules and protocols that allow applications to communicate and exchange data.
A specific URL path used to perform an action or retrieve data from an API.
The process of verifying identity before granting access to an API or service.
A callback URL where the API sends event data in real time to notify your app of changes.
Automatically create a GHL contact when a user signs up in Your App and assign a welcome task.
When a task is created in Your App, mirror it as a GHL task linked to the related contact.
Append important notes in GHL when events occur in Your App to build a complete contact history.
Register Your App in the GHL developer console, then obtain client ID, client secret, and required scopes for contacts access.
Define how Your App fields map to GHL contact fields (email, name, phone, etc.).
Test with sandbox data, verify each endpoint, and move to production once validated.
The Relate section supports multiple endpoints for the Contacts API, including GET /contacts/:contactId to fetch a single contact, GET /contacts/:contactId/tasks for related tasks, GET /contacts/:contactId/notes for notes, and the full set of CRUD operations across contacts, tasks, and notes. See the endpoint list for a complete view of available calls and their purposes. You can combine reads to assemble a rich view of a contact’s activity from notes, tasks, and appointments.
Authentication uses OAuth 2.0 tokens or API keys. Include the access token in the Authorization header and ensure tokens are refreshed before expiry. For apps with user-level access, device and redirect URIs should be secured, and scopes should be limited to the necessary permissions (for example, contacts.readonly). Always rotate credentials on a regular cadence and store them securely.
Yes. You can create and attach tasks and notes to a contact via the API. Use POST /contacts/:contactId/tasks to create tasks and POST /contacts/:contactId/notes to add notes. Each call should include the required fields (such as task title, notes content, and the target contactId) to ensure proper linkage.
Best practices include using idempotent requests where possible, validating input data before submission, and keeping a clear mapping of fields between Your App and GHL. Prefer updates via PUT for existing records and avoid overwriting fields unintentionally. Implement proper error handling and retry logic.
The API enforces rate limits to protect service quality. If you anticipate higher usage, design your integration with backoff strategies and batched requests where appropriate. Contact support if you expect sustained spikes or need higher quotas.
Yes, DELETE endpoints can remove contacts and tasks (for example, DELETE /contacts/:contactId and DELETE /contacts/:contactId/tasks/:taskId). Use caution and ensure you have proper backups or a confirmation flow in your app to prevent accidental data loss.
Developer documentation and code examples are available in the official guides. You’ll find curl samples, Postman collections, and SDK references to help you build and test quickly. Use these resources to validate your requests before moving to production.
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Complete Operations Catalog - 126 Actions & Triggers
