The Contacts API uses OAuth 2.0. Start by obtaining a clientId and clientSecret, request an access token, and refresh tokens as needed. Store credentials securely and limit scopes to the minimum required (readonly for read-only flows).
Configure your app to securely store tokens, client IDs, and secrets. Use secure storage, rotate credentials regularly, and implement token refresh flows to keep connections alive.
Core read/write endpoints include: GET /contacts/:contactId, GET /contacts/:contactId/tasks, GET /contacts/:contactId/notes, POST /contacts/, PUT /contacts/:contactId, DELETE /contacts/:contactId, and related endpoints for tags and appointments. Use these to read data and drive actions in your app.
Trigger: When a new contact is created in your app, fetch the contact’s details from the Contacts API (GET /contacts/:contactId) and map fields into App records.
Actions: map firstName, lastName, email, phone to your app, then create or update related tasks and notes as needed.
GET /contacts/:contactId
contactId, firstName, lastName, email, phone
Trigger: updates to a contact’s tasks or notes in the GHL API trigger downstream changes in APPNAME.
Actions: create or update tasks, notes in APPNAME based on changes from GHL, and keep fields in sync.
GET /contacts/:contactId/tasks
taskId, contactId, title, status, dueDate, noteId, content
Trigger: a contact is created or updated in APPNAME triggers upsert in GHL.
Actions: upsert contact via PUT /contacts/:contactId and attach tags via POST /contacts/:contactId/tags.
PUT /contacts/:contactId
contactId, tags
Fast setup with no server code required using Zapier-style connectors and prebuilt actions.
Automatic data synchronization ensures contacts, tasks, and notes stay aligned between GHL and APPNAME.
Scalable automations across your contact ecosystem with consistent field mappings and triggers.
Explore common API terms used in this integration: API, endpoint, authentication, trigger, action, payload, and mapping.
Application Programming Interface: a set of rules that lets apps talk to the Contacts API and exchange data.
A specific URL in the API that performs a function, such as retrieving a contact or a list of tasks.
The process used to verify identity and grant access to GHL APIs (e.g., OAuth 2.0).
An event that starts an automation or workflow in APPNAME or GHL.
Aggregate contact data from GHL into APPNAME to create a single, searchable profile.
Automatically create or update tasks in APPNAME when GHL tasks change.
Use data from the API to tailor messages and timelines by contact segment.
Register your APPNAME in GHL and obtain a client ID and secret.
Configure OAuth 2.0 flow to request and refresh tokens.
Define field mappings and run tests to verify connectivity.
The GHL Contacts API is a RESTful interface that lets apps access and manage contacts, tasks, notes, and more. You can fetch, create, update, and delete data according to the documented endpoints. Use this to drive automations in APPNAME without custom coding. The API is designed to be easy to adopt with clear mappings between fields in GHL and your app.
Some integrations can be built with no code using connectors, but a basic familiarity with API concepts helps. If you need deeper customization, you may implement custom scripts or middleware to handle complex mappings and error handling.
Permissions are granted via OAuth 2.0 scopes. Start with the minimum scope needed (readonly for read-only flows) and elevate only as required. Always apply the principle of least privilege.
Authentication uses OAuth 2.0. Obtain an access token with your client credentials, and refresh tokens when they expire. Store tokens securely and rotate secrets regularly.
Supported endpoints cover reading and writing contacts, tasks, notes, and tags. Examples include GET /contacts/:contactId and POST /contacts/. Review the official docs for the full list and usage details.
Test the connection in a sandbox or development environment first. Use sample data to verify mappings, then perform end-to-end tests to ensure updates propagate correctly between GHL and APPNAME.
If you need help, consult the docs, contact support, or engage your integration partner. Most issues come from misconfigured credentials, incorrect field mappings, or outdated tokens.
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Complete Operations Catalog - 126 Actions & Triggers
