Authenticate requests to the Contacts API using OAuth 2.0 credentials issued by your GHL account. This ensures secure access to contact data, tasks, notes, and appointments.
Create and authorize a connection in Zapier to access your Contacts data from GHL using OAuth 2.0 credentials in a secure, token-based flow.
Key endpoints include 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, and write-and-manage endpoints like 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, and POST /contacts/:contactId/tags.
Trigger: When a contact is updated in GHL, Seam can push updates to Zapier instantly.
Actions: Create or update a contact, attach tasks, and log notes from your automation.
GET /contacts/:contactId
Key fields: contactId, email, fullName, phone, firstName, lastName
Trigger: New contacts created in GHL can be batched into Zapier.
Actions: Bulk create or update contacts, apply default tags and notes.
POST /contacts/
Key fields: name, email, businessId, phone
Trigger: Updates to tasks or notes in GHL trigger downstream actions in Zapier.
Actions: Create or update tasks, log notes, and update statuses.
PUT /contacts/:contactId/tasks/:taskId
Key fields: contactId, taskId, title, status, dueDate
Automate workflows without writing code.
Real-time data sync across your favorite apps to keep teams aligned.
Centralized data flows reduce manual entry and speed up approvals.
This glossary defines API terms and integration concepts used throughout this guide.
API: a set of rules that lets applications talk to one another.
Endpoint: a specific URL path in an API used to access a resource.
OAuth 2.0: authorization framework that lets apps access data securely without sharing passwords.
Webhook: a callback URL that apps call when an event happens so your system can react in real-time.
Route new contacts to the correct teams instantly based on rules you configure in Zapier.
Auto-tag and enrich contact records as they flow through your apps for better segmentation.
Set up weekly deduping and data-cleanup tasks to keep contacts pristine.
In Zapier, authorize Seam to access your GHL Contacts data using OAuth 2.0 credentials.
Map fields between endpoints and your target apps, then test the flow.
Run tests to confirm data integrity and deploy to production.
The Contacts API provides programmatic access to your CRM data, including contacts, tasks, notes, and appointments. It enables reading, creating, updating, and deleting records so you can automate workflows. This makes it easy to sync information with other apps and keep your teams aligned.
Permissions are controlled by the OAuth scopes you grant. The example scope shown here is contacts.readonly, but you can request write access as needed for your automations. Ensure the app connection is authorized with the correct scopes to perform the actions required.
Authentication uses OAuth 2.0. In most setups you’ll redirect users to GHL to authorize the app, then exchange a token for API requests. Store tokens securely and refresh them before expiry to maintain uninterrupted access.
Available endpoints cover reading and managing contacts, tasks, notes, and appointments, as well as creating and updating records. Refer to the Endpoint List in this guide for full details and examples.
Bulk operations are possible by processing multiple records in a single workflow or via batch endpoints where supported. Always monitor rate limits and test thoroughly to avoid failures.
Data syncing speed is influenced by API rate limits and your Zapier task configuration. Real-time triggers can notify you instantly, while bulk imports run on scheduled batches.
Common issues include invalid tokens, missing scopes, and incorrect field mappings. Check the connection status, reauthorize if needed, and verify endpoint paths and payload schemas in your Zap setup.
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