To use the GHL Contacts API, obtain a valid access token with the required scope (contacts.readonly). Include the token in the Authorization header for each request.
Set up a secure connection to MailerLite so your app can create, update, and sync subscriber data between MailerLite and the GHL 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; 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 new or updated subscriber is detected in MailerLite.
Actions: create or update the corresponding contact in GHL, ensure email is synchronized, and assign default tags or lists.
POST /contacts/ to create or upsert a GHL contact from MailerLite data.
Key fields: email (unique), first_name, last_name, phone, custom fields.
Trigger when a GHL contact is updated.
Actions: push updates to MailerLite to keep subscriber data current.
PUT /contacts/:contactId to update a GHL contact and reflect changes in MailerLite.
Key fields: email, contactId, updated fields such as name or phone.
Trigger when tags are added or removed on either side.
Actions: apply corresponding tag changes in the other app to keep parity.
POST /contacts/:contactId/tags or PUT /contacts/:contactId/tags to mirror tag updates.
Key fields: email, tag names, tag IDs.
No-code automation with Zapier App Connector lets you link MailerLite to the GHL Contacts API without writing code.
Drag-and-drop workflows enable rapid deployment and easy maintenance.
Shared data across apps reduces manual updates and improves accuracy.
This glossary defines terms like API Endpoint, Authentication, Webhook, and Pagination, and explains how they apply to the GHL Contacts API and MailerLite integration.
A URL path used to access a specific resource or action in an API.
A real-time notification sent by an API when a specific event occurs.
The process of verifying identity and permission to access an API.
How APIs divide large results into pages for efficient retrieval.
Automatically create a new GHL contact when a MailerLite subscriber signs up, ensuring consistent lead data across platforms.
Mirror tag additions/removals between GHL and MailerLite to preserve segmentation rules.
Aggregate data from both apps into a single dashboard for better insights.
Collect your GHL access token with the correct scope and obtain MailerLite API credentials.
Define how contact fields map between GHL and MailerLite and set up the necessary webhooks or zap triggers.
Run test scenarios to confirm data sync works as expected and deploy to production.
No traditional coding is required. Use the Zapier App Connector and built-in mappings to connect MailerLite with the GHL Contacts API. You can configure triggers, actions, and field mappings via a visual editor. If you prefer, you can also use webhooks and pre-built templates provided in the connector.
You can sync core contact data (email, name, phone), subscription status, and custom fields. You can also sync notes, tasks, and tags depending on the endpoints you enable. The goal is to keep records consistent across both systems.
Security is ensured by using OAuth or API keys with scoped permissions, encrypted transmission (HTTPS), and least-privilege access. Regular token rotation and audit logs help you monitor activity.
Yes. Triggers and workflows can be customized in Zapier or your integration layer. You can adjust field mappings, add conditional logic, and set up multimodal triggers across apps.
Authenticate API calls using your GHL access token or API key with the required scope. Include the Authorization header in every request and renew tokens before expiry.
Common tasks include creating contacts, updating contact fields, syncing tags, and reading activities like tasks/notes. Endpoints like POST /contacts/ and PUT /contacts/:contactId cover most use cases.
You can view logs in Zapier and in your API provider dashboards. Look for failed submissions, invalid field mappings, or rate limits. Use retry policies and idempotent requests to recover gracefully.
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Complete Operations Catalog - 126 Actions & Triggers
