Access to the endpoints requires a valid GHL OAuth token. Use Bearer tokens in the Authorization header and apply the scope that matches the data you read, typically contacts.readonly for reading contact data and contacts.write for updates.
In Newsletter2Go, connect to GHL via OAuth, authorize the app, and securely store the access token and refresh token. If Newsletter2Go provides a service account, enter its client credentials and configure automatic token refresh.
GET /contacts/:contactId — Retrieve a single contact.\nGET /contacts/:contactId/tasks — Retrieve tasks for a contact.\nGET /contacts/:contactId/tasks/:taskId — Retrieve a specific task.\nGET /contacts/:contactId/notes — Retrieve notes for a contact.\nGET /contacts/:contactId/notes/:id — Retrieve a specific note.\nGET /contacts/:contactId/appointments — Retrieve appointments for a contact.\nGET /contacts/ — List contacts.\nGET /contacts/business/:businessId — Retrieve contacts by business.\ncontacts.write — Permission to write contact data.\nPOST /contacts/ — Create a new contact.\nPUT /contacts/:contactId — Update a contact.\nDELETE /contacts/:contactId — Delete a contact.\nPOST /contacts/:contactId/tasks — Create a task for a contact.\nPUT /contacts/:contactId/tasks/:taskId — Update a task.\nPUT /contacts/:contactId/tasks/:taskId/completed — Mark a task as completed.\nDELETE /contacts/:contactId/tasks/:taskId — Delete a task.\nPOST /contacts/:contactId/tags — Add tags to a contact.
Trigger: When a new or updated subscriber is added in Newsletter2Go, create or update the corresponding contact in GHL via POST /contacts/ and PUT /contacts/:contactId.
Actions: Create or update contact in GHL, assign tags, attach tasks, and keep status in sync with Newsletter2Go.
POST /contacts/
email, firstName, lastName, phone, leadSource, tags
Trigger: Updates to a GHL contact via PUT /contacts/:contactId push updated fields to Newsletter2Go to refresh subscriber data.
Actions: Read /contacts/:contactId and update corresponding Newsletter2Go profile fields or custom fields.
GET /contacts/:contactId
contactId, email, firstName, lastName, customFields
Trigger: Newsletter2Go creates a task; mirror by calling POST /contacts/:contactId/tasks.
Actions: Create tasks in GHL and reflect progress; map task fields from Newsletter2Go.
POST /contacts/:contactId/tasks
contactId, taskTitle, dueDate, priority, status
Fast setup with no coding required using no-code connectors to link Newsletter2Go with GHL.
Automate contact and task sync to keep data up to date across platforms without custom development.
Improve segmentation and campaign ROI by enriching Newsletter2Go with rich GHL contact data.
This section covers essential terms and processes you’ll encounter when integrating the GHL Contacts API with Newsletter2Go.
An API is a set of rules and endpoints that allow applications to communicate and share data.
A webhook is a way for one app to notify another when something happens.
A specific URL in an API that performs a particular action or returns data.
Technique to fetch data in chunks when a response includes many records.
When a new subscriber is added in Newsletter2Go, automatically create a contact in GHL and assign a welcome task or tag.
Use GHL contact properties to tailor Newsletter2Go campaigns and workflows.
Sync GHL task progress back to Newsletter2Go to adjust follow-ups.
Obtain OAuth credentials from GHL and authorize Newsletter2Go to access the Contacts API.
Define which Newsletter2Go fields map to GHL contact fields and set scope to read/write.
Run test synchronizations, validate data integrity, and switch to live syncing.
The API lets you read contact records, their tasks, notes, and upcoming appointments using read-only access or with write scopes for updates. You can also fetch lists of contacts and related data to drive newsletters and automation. Always ensure you request the minimum necessary scope for your use case.\nFor safety and performance, implement proper error handling and respect API rate limits during any test or production sync.
Authentication is done with OAuth tokens or API keys, provided by GHL. Include the access token in the Authorization header as Bearer
Key endpoints include GET /contacts/:contactId to retrieve a contact, GET /contacts/:contactId/tasks to fetch tasks, POST /contacts/ to create contacts, PUT /contacts/:contactId to update, and POST /contacts/:contactId/tasks to add tasks. These cover most subscriber and task workflows in Newsletter2Go.\nOther useful endpoints include GET /contacts/ for listings and GET /contacts/:contactId/notes for notes.
Yes, with appropriate scopes (such as contacts.write) you can create and update data from Newsletter2Go. Ensure your app’s permissions align with the actions you perform.\nAlways test updates in a sandbox or staging environment before going live.
GHL applies rate limits to protect service reliability. If you hit limits, implement exponential backoff and retry logic, and consider batching where supported.\nFor large data moves, plan periodic sync windows and monitor queue lengths.
GHL uses encryption in transit (TLS) and at rest for stored credentials. Maintain secure storage for tokens, use secure endpoints, and follow your organization’s data security policies when handling subscriber data.
Test with a dedicated sandbox or test campaign. Use sample data to verify mapping, check for data integrity, and monitor logs. Once you confirm the data flows correctly, gradually enable live syncing with monitoring.
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Complete Operations Catalog - 126 Actions & Triggers
