Use OAuth 2.0 or API keys from GHL to authorize ChangeTower to access Contacts API data. Ensure the app scope is correct (contacts.readonly) and store tokens securely.
Authorize ChangeTower in your GHL developer console, granting the required Contacts API scopes. Use a secure redirect URI and rotate credentials regularly.
Commonly used endpoints: GET /contacts/:contactId; GET /contacts/:contactId/tasks; GET /contacts/:contactId/notes; POST /contacts/; PUT /contacts/:contactId; DELETE /contacts/:contactId; POST /contacts/:contactId/tasks; POST /contacts/:contactId/tags; GET /contacts/; GET /contacts/business/:businessId
Trigger: when a new contact is created in ChangeTower
Actions: create or update the corresponding contact in Contacts API, and sync basic fields
Example methods: POST /contacts/ to create, PUT /contacts/:contactId to update
Key fields: email, firstName, lastName, phone, businessId
Trigger: add a note or create a task in ChangeTower
Actions: POST to /contacts/:contactId/notes and /contacts/:contactId/tasks
Methods: POST /contacts/:contactId/notes; POST /contacts/:contactId/tasks
Fields: contactId, noteId, taskId
Trigger: appointment created or updated in ChangeTower
Actions: create or update Contacts API appointments via POST /contacts/:contactId/appointments
POST /contacts/:contactId/appointments
Fields: contactId, appointmentId, dateTime, location
Automate data sync to save time and avoid manual data entry.
Maintain consistency across contacts, notes, tasks, and appointments.
Improve accuracy and speed with no-code automation.
This glossary defines API, endpoint, authentication, triggers, actions, and data fields used in the integration.
Application Programming Interface: a set of rules that allows software to communicate.
Process of verifying identity to grant access to APIs.
A specific URL path in an API that performs a function.
A mechanism for real-time data notification.
Automatically tag contacts based on source or behavior
Create tasks with due dates to nurture leads
Attach meeting summaries as notes on contact records
From GHL, obtain Client ID/Secret or API key; from ChangeTower, prepare OAuth settings.
Map endpoints to ChangeTower fields.
Run tests and verify logs.
You will typically need at least read access to Contacts (scope: contacts.readonly) to view data in ChangeTower and create or update operations as required by your workflows. If you manage write operations, ensure you have appropriate write permissions for creating or updating contacts, notes, tasks, and appointments. Always follow the principle of least privilege.
The integration uses standard OAuth tokens or API keys and supports secure storage, token rotation, and encrypted transmission. Always use HTTPS endpoints and follow your organization’s security policies. Review GHL and ChangeTower permission scopes to minimize risk.
Yes. You can map custom fields from GHL Contacts to ChangeTower fields. Use field mappings to sync custom attributes such as source, lifecycle stage, or internal IDs. Ensure field types are compatible and test thoroughly.
Common issues include invalid credentials, expired tokens, or mismatched field mappings. Re-authenticate, refresh tokens, and verify endpoint URLs and scopes. Check integration logs for detailed error messages.
Zapier is optional for this setup. You can connect ChangeTower directly to the GHL Contacts API or use Zapier as a middleware if you prefer. The core data flows are supported without Zapier.
Data retention policies depend on your GHL and ChangeTower configurations and legal requirements. Consider short-term caches and long-term archival strategies as needed. Review data minimization practices.
Yes. You can revoke the app’s access from your GHL developer console at any time. This will cut off tokens and disable integration until you reauthorize.
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Complete Operations Catalog - 126 Actions & Triggers
