GHL supports secure access via OAuth 2.0 or API keys. Start by creating a connection in Zapier, then select the Contacts API and grant permissions.
In Zapier, set up a new connection to your GHL Contacts API. Choose OAuth 2.0 if available, or supply your API key and secret to authorize requests.
Key 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, 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, pull the latest contact details into your workflow
Actions: get contact, fetch tasks, fetch notes, fetch appointments
Example: GET /contacts/:contactId
Key fields: contactId, name, email, phone
Trigger: new or updated tasks for a given contact
Actions: list tasks, list notes, create task, update task
Example: GET /contacts/:contactId/tasks
Key fields: contactId, taskId, status
Trigger: mark a task as completed or updated
Actions: update task status, add comments, tag tasks
Example: PUT /contacts/:contactId/tasks/:taskId/completed
Key fields: contactId, taskId, completed
Automate repetitive processes without writing code
Sync contacts, tasks, notes, and appointments across apps in minutes
Build agile workflows with reusable triggers and actions
This glossary defines common terms used in the GHL API and Zapier App Connector to help you build reliable automations.
The GHL API exposes resources like contacts, tasks, notes, and appointments via REST endpoints for integration.
A URL paired with an HTTP method used to read or modify data in the GHL system.
An event in an app that starts a Zap or workflow in Zapier.
The process of proving identity to access APIs, typically via OAuth 2.0 or API keys.
When a new invoice is created in Invoice2go, automatically create or update the related contact in GHL via the API and start a task to follow up.
Pull tasks related to a contact and map them to Invoice milestones for cohesive project tracking.
Send Slack or email alerts when a contact’s task status updates to keep everyone aligned.
Create a connection in Zapier to the Contacts API by providing credentials or completing OAuth flow.
Choose triggers like new or updated contacts and tasks, then map fields to your app.
Create Zaps that respond to GHL events and perform actions in Invoice2go or your CRM.
You authenticate by creating a connection in Zapier and completing the OAuth 2.0 flow or supplying an API key. Once connected, Zapier will use the access token to make requests to the Contacts API. If your credentials expire, refresh via the standard OAuth flow. For API keys, include the key in the Authorization header per your provider’s guidance. Follow the prompts in Zapier to test the connection before you build your Zap. The connection remains secure and scoped to the permissions you grant.
The endpoints cover essential data for contact management: GET /contacts/:contactId, GET /contacts/:contactId/tasks, GET /contacts/:contactId/notes, GET /contacts/:contactId/appointments, plus create, update, and delete operations like POST /contacts/, PUT /contacts/:contactId, and DELETE /contacts/:contactId. You can fetch all contacts with GET /contacts/ and filter by business with GET /contacts/business/:businessId. Use these to assemble your automations in Zapier.
Yes. You can create or update contacts with POST and PUT endpoints, and manage tasks with POST and PUT endpoints. Zapier actions can trigger these endpoints to keep data in sync across systems. For updates, use PUT and specify the resource ID to modify existing records.
Rate limits depend on your GHL plan and API tier. Implement simple retries with exponential backoff and respect HTTP status codes. Handle 429s (too many requests) by delaying retries, and surface clear error messages in your Zap feedback.
No coding is required for standard automations. The prebuilt triggers and actions in Zapier let you connect Contacts API endpoints visually. If you need bespoke logic beyond built‑in steps, a small code step can be added, but it is not required for typical workflows.
Yes. You can route data to multiple apps by using multi‑step Zaps or branching. Share the same contact data with your CRM, invoicing, and project management apps to keep teams aligned across platforms.
See the glossary and terms sections at the bottom of the page for definitions. You can also explore the API endpoints and how they map to common automation concepts to deepen understanding.
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