Authenticate using API keys with the scope: contacts.readonly. Securely store credentials and rotate keys as part of your security best practices.
Establish a trusted connection by exchanging tokens and using your app credentials. Ensure the access scope matches the data you intend to access.
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 contact is created or updated in GHL, push changes to OneSignal to keep audiences aligned.
Actions: create or update the contact in OneSignal; adjust segments or tags as needed.
PUT /contacts/:contactId
Key fields: contactId, email, phone, status
Trigger: a task is created or updated in GHL, then mirrored in OneSignal.
Actions: create or update a task in OneSignal and attach it to the related contact.
POST /contacts/:contactId/tasks
Key fields: contactId, taskId, status, dueDate
Trigger: notes are added or updated in GHL, then synced to OneSignal.
Actions: create or update notes in OneSignal and link to the contact record.
PUT /contacts/:contactId/notes/:id
Key fields: contactId, noteId, timestamp
No coding required: configure connections in a visual builder with drag-and-drop actions.
Fast to deploy: set up data flows quickly and see updates in real time.
Scales with your business: add more endpoints and automations without writing code.
This section defines core concepts like endpoints, triggers, actions, and data mapping across GHL and OneSignal.
An API is a set of endpoints that lets GHL’s Contacts data communicate with OneSignal to perform actions on contacts, tasks, notes, and more.
A specific URL path that performs a function in an API.
A secure authorization framework used to grant third-party apps access without sharing passwords.
A callback URL that receives real-time updates from GHL to OneSignal.
Send targeted push or in-app messages in OneSignal when a contact changes in GHL.
Use GHL segments to trigger personalized campaigns in OneSignal.
Synchronize tasks and events to drive lifecycle emails and push notifications.
Create API credentials in GHL and OneSignal, then authorize the integration.
Define how contact fields align with OneSignal attributes and which endpoints to use.
Run tests, verify data sync, then enable automation for production.
You do not need to code to set up the basic connection. The integration is designed for no-code configuration via a visual builder, making it easy to map contacts, tasks, and notes between GHL and OneSignal. For advanced use cases, you can add custom rules to tailor how data flows between systems. Start with the core endpoints and expand as your workflows mature.
Key endpoints include GET /contacts/:contactId to fetch a contact, POST /contacts/ to create, PUT /contacts/:contactId to update, and POST /contacts/:contactId/tasks to attach tasks. For notes, use POST /contacts/:contactId/notes and PUT /contacts/:contactId/notes/:id. These endpoints support syncing basic contact data, tasks, and notes between GHL and OneSignal.
Security is ensured through OAuth 2.0-based authorization and scoped access (e.g., contacts.readonly). Tokens should be stored securely and rotated regularly. Use least-privilege permissions and audit logs to monitor access and changes.
Yes. You can map custom fields from GHL to corresponding attributes in OneSignal. Define field mappings in the integration settings so that important data (like custom tags or user properties) flows with each API call.
API rate limits apply based on your account plan. If you approach limits, you can implement batching, caching, or staggered sync schedules to maintain smooth data flow without interruptions.
Use sandbox/test environments to test endpoints. Verify responses, data mapping, and error handling. Then run a small, controlled live sync before going fully production. Monitor logs for any anomalies.
Yes. If needed, you can revert changes by re-fetching data from GHL or OneSignal and re-applying previous values. Implement versioning in your mappings and keep backups of configurations.
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Complete Operations Catalog - 126 Actions & Triggers
