Authenticate API calls with your GHL API Key and the required scope (contacts.readonly). Include the Authorization header: Bearer
In vFairs, register the integration to obtain OAuth credentials or an API token and exchange for an access token. Use this token when calling the GHL Contacts endpoints.
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: New or updated attendee data in vFairs creates or updates a contact in GHL.
Actions: map fields (email, name, phone), set tags, update status, and ensure unique records by email.
POST /contacts/ to create; PUT /contacts/:contactId to update
email, firstName, lastName, phone, company, tags
Trigger: When a task is created in vFairs for a contact, mirror it as a task in GHL.
Actions: create or update tasks; set status; assign due date; keep relation to contactId.
POST /contacts/:contactId/tasks
taskId, title, dueDate, status, priority
Trigger: Note added in vFairs links to the corresponding GHL contact as a note.
Actions: create notes in GHL with content, author, and timestamp
POST /contacts/:contactId/notes
noteId, content, createdDate, author
Real-time attendee data sync reduces manual entry and errors
Unified view of contacts, tasks, and notes empowers teams
Automated tagging and segmentation for targeted follow-ups
A quick glossary of terms used in this guide: endpoints, triggers, actions, authentication, and data mapping.
A canonical URL and HTTP method used to access a resource in an API.
An event in one app that starts an automation or workflow.
A task performed in response to a trigger, such as creating a record or updating data.
The process of verifying identity and granting access tokens or keys for API calls.
Idea: automatically push new attendee data from vFairs to GHL as soon as it’s created.
Idea: apply tags in GHL based on attendee responses and events in vFairs.
Idea: create and assign follow-up tasks in GHL when attendees take specific actions in vFairs.
Generate a secure API key in GHL and set up your vFairs OAuth credentials.
Define how contact fields align (email, name, phone) and which endpoints to use.
Run test calls, verify data flow, and set up alerts for failures.
Yes. The Contacts API integration enables two-way data flow between vFairs and GHL. You can create new contacts in GHL from vFairs and update existing records when attendee details change. This keeps both systems in sync without manual entry.
Supported endpoints include retrieving a contact, tasks, notes, appointments, and the ability to create or update contacts and their related items. Review the endpoint list for full coverage.
Authenticate each call with your GHL API key and the required scopes. Use the Authorization header and ensure tokens are stored securely. For vFairs, use its OAuth flow to obtain a valid access token for calls to GHL.
Yes. PUT and POST operations allow updating existing contacts, tasks, and notes. You can modify fields, reassign tasks, and add notes as needed.
If a call fails, check the error code and message, retry with exponential backoff, and verify required scopes. Implement logging to identify transient vs. permanent failures.
Yes. You can apply filters by scope (read-only vs read-write) and by endpoints to limit data access in your integration.
Webhooks can be configured to push updates to your system in real-time. If not available, rely on polling or scheduled syncs with error alerts.
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Complete Operations Catalog - 126 Actions & Triggers
