Authenticate requests to the GHL Contacts API using your credentials and access tokens. Use the scope ‘contacts.readonly’ for read access and follow secure token handling practices.
LettrLabs uses API keys and OAuth tokens to access contact data. Ensure your API keys are stored securely and rotated regularly, with the correct GHL scope applied: contacts.readonly.
– GET /contacts/:contactId — Retrieve a single contact\n- GET /contacts/:contactId/tasks — List tasks for a contact\n- GET /contacts/:contactId/tasks/:taskId — Get a specific task\n- GET /contacts/:contactId/notes — List notes for a contact\n- GET /contacts/:contactId/notes/:id — Get a single note\n- GET /contacts/:contactId/appointments — Retrieve appointments for a contact\n- GET /contacts/ — List all contacts\n- GET /contacts/business/:businessId — Get contacts by business\n- contacts.write — Scope for write operations\n- POST /contacts/ — Create a contact\n- PUT /contacts/:contactId — Update a contact\n- DELETE /contacts/:contactId — Delete a contact\n- POST /contacts/:contactId/tasks — Create a task for a contact\n- PUT /contacts/:contactId/tasks/:taskId — Update a task\n- PUT /contacts/:contactId/tasks/:taskId/completed — Mark a task complete\n- DELETE /contacts/:contactId/tasks/:taskId — Delete a task\n- POST /contacts/:contactId/tags — Add tags to a contact
Trigger: contact data changes in GHL trigger a sync to LettrLabs to update records and fields.
Actions: map fields (id, email, name, phone), update LettrLabs contact profile, and log the sync event.
Method/Path: GET /contacts/:contactId
Key fields: id, email, name, phone, tags, notes, lastModified
Trigger: a task is created or updated for a contact in GHL
Actions: create/update corresponding tasks in LettrLabs, track status, due dates, and completion.
Method/Path: GET /contacts/:contactId/tasks
Key fields: contactId, taskId, title, dueDate, status
Trigger: new note or activity logged for a contact
Actions: pull notes into LettrLabs, attach to the correct contact, preserve timestamps.
Method/Path: GET /contacts/:contactId/notes
Key fields: noteId, content, createdAt, updatedAt
No-code automation lets your team focus on conversations while data stays in sync, behind a secure interface.
Set up in minutes with RESTful endpoints and clear mapping between contact fields, tasks, notes, and appointments.
Scale workflows as your contact base grows, with centralized data management across systems.
Explore essential terms used in the LettrLabs + GHL Contacts API integration, including endpoints, authentication, and data mapping.
A RESTful interface to access and manage contact records, tasks, notes, and appointments.
Action items linked to a contact to track to-dos and progress.
Text entries attached to a contact capturing context and updates.
Scheduled meetings or calls associated with a contact.
Capture lead data via forms and push into GHL Contacts API, then sync to LettrLabs.
Generate reminders for tasks when contact inactivity is detected.
Tag and segment audiences based on notes content.
Register your LettrLabs app and generate API keys with the Contacts API.
Set scope to contacts.readonly and grant necessary access.
Use test endpoints to verify data flows before going live.
Authentication for the GHL Contacts API uses OAuth tokens and API keys. Start by obtaining client credentials from your GHL developer portal and request an access token with the appropriate scope, such as contacts.readonly. Include the access token in the Authorization header of every request. Rotate tokens regularly and store them securely using a secrets manager. For automated systems, use refresh tokens to maintain a seamless connection.
GET /contacts/:contactId returns a single contact object with core fields like id, name, email, phone, and custom fields. You can also request related data such as tasks, notes, and appointments via nested endpoints. Use query parameters to filter results and paginate large datasets as needed.
Yes. You can create new contacts with POST /contacts/ and update existing ones with PUT /contacts/:contactId. Be mindful of required fields and validation errors. After changes, consider syncing to LettrLabs to maintain consistency across systems.
Secure API keys by using a secrets manager, limiting access, and rotating keys regularly. Never embed keys in client-side code. Use server-side proxies to handle calls to the GHL API and log access for auditing.
Rate limits depend on your GHL plan and endpoint. For typical calls, expect a practical limit that prevents abuse while allowing frequent data syncs. If you hit limits, implement backoff and retry strategies and batch requests where possible.
Real-time sync is possible with webhooks and webhook listeners. Configure events for contact updates, note additions, or task changes to push data to LettrLabs as soon as they occur.
Endpoint documentation is available in the GHL developer portal and the LettrLabs integration docs bundle. Use the provided endpoint shapes and sample requests to structure your integrations.
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