Authenticate calls to the Contacts API using OAuth 2.0 with the defined scope: contacts.readonly. Use your GHL app credentials to obtain access tokens and refresh tokens for HelloLeads.
HelloLeads authenticates requests to the GHL Contacts API on behalf of a user or service via secure OAuth flows with stored tokens. Keep tokens rotated and securely stored.
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 contacts.write 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 in HelloLeads to pull the latest profile data and related tasks from the GHL Contacts API.
Synchronize contact fields, create or update tasks, and attach notes as needed.
GET /contacts/:contactId
contactId, name, email, phone, tasks, notes
Trigger when a note is added or updated for a contact in HelloLeads.
Create, update, or delete notes via the Contacts API and sync with HelloLeads notes.
GET /contacts/:contactId/notes
noteId, note, date
Trigger when a new appointment is created in HelloLeads to reflect it in the Contacts API.
Create or update appointments and related tasks using the /appointments and /tasks endpoints.
GET /contacts/:contactId/appointments
appointmentId, date, time, location
Automate data flow between HelloLeads and the GHL Contacts API without writing code.
Keep contact records synchronized across platforms with real-time updates.
Trigger cross‑app automations with webhooks and built-in workflows.
This glossary defines Contacts, Tasks, Notes, Appointments, and Endpoints as they relate to the GHL Contacts API and the HelloLeads integration.
A person or account in HelloLeads that you manage, identified by a unique contactId and linked to tasks, notes, and appointments.
A to-do item associated with a contact, such as a follow-up call or meeting scheduled in HelloLeads.
A text entry linked to a contact that records information, interactions, or reminders.
A URL path exposed by the API that represents a resource you can read or modify.
Configure a workflow that pushes changes in HelloLeads to the Contacts API so contact records stay up to date across tools.
Link notes created in the Contacts API to HelloLeads to provide context and a complete activity timeline.
Auto-create tasks and appointments in HelloLeads when items appear in the Contacts API to keep teams aligned.
Register your app in GHL to obtain client_id, client_secret, and the required scopes.
Configure access tokens with scopes including contacts.readonly and test connectivity between HelloLeads and GHL.
Run end-to-end tests with sample data to confirm data flows correctly.
The Contacts API is a GHL API that exposes endpoints to read and manage contacts, tasks, notes, and appointments for HelloLeads integrations. It enables programmatic access to contact records and related activities so workflows can be automated. You can pull data into HelloLeads, push updates, and trigger automations using standard HTTP requests.
No-code workflow builders and connectors can cover most common use cases, letting you automate without custom code. For advanced logic, you can add custom webhooks or lightweight scripting to tailor behavior to your business rules.
Endpoints cover reading, creating, updating, and deleting contacts, tasks, notes, and appointments. You will typically use GET for retrieval, POST for creation, PUT for updates, and DELETE for removals. See the endpoint list above for exact paths.
Most quick setups take only a few minutes with a ready‑to‑use template. More complex automations and testing can take longer, depending on data volume and verification needs.
The primary scope shown is contacts.readonly. For write operations you may need contacts.write and the appropriate authorization on your app. Always follow least-privilege principles.
Common errors include invalid tokens, expired scopes, or missing required fields. Use token refresh, re-authenticate, and validate payload formats. Detailed error messages guide you to the exact issue.
Yes. You can sync notes and tasks between HelloLeads and the Contacts API using webhooks and endpoint calls. Build pipelines that keep activity in sync and provide a complete history.
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