Authenticate requests using your API credentials. Use the provided API key and the required scope (contacts.readonly) to securely access contact data from the GHL Contacts API when connecting to Postscript.
Postscript connects to the Contacts API via OAuth tokens or API keys. Store credentials securely, and grant the integration the necessary permissions to read or modify contact data as needed.
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; Endpoint9: write access to contacts (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: fetch a single contact by ID and pull related tasks to stay up to date.
Actions: update notes, create or complete tasks, and tag contacts based on activity.
GET /contacts/:contactId (and related /contacts/:contactId/tasks, /contacts/:contactId/notes).
Key fields: contactId, name, email, phone, lastTaskId
Trigger: batch export/import of contacts and notes from Postscript into GHL.
Actions: upsert contacts, create notes, attach tags.
GET /contacts/ or POST /contacts/ depending on read vs write
Key fields: contactId, businessId, name, email
Trigger: new or updated tasks to drive follow-ups.
Actions: create tasks, update status, log completions.
POST /contacts/:contactId/tasks or PUT /contacts/:contactId/tasks/:taskId
Key fields: contactId, taskId, title, status
No-code automation: set up data flows without writing code.
Visual mappings: map fields between systems with a click.
Faster onboarding: start syncing in minutes, not days.
This glossary defines the core elements you’ll encounter when integrating the GHL Contacts API with Postscript, including endpoints, fields, and common workflows.
A URL path used to access a specific resource in the GHL API.
A piece of work assigned to a contact, such as a follow-up or reminder.
A person stored in the GHL Contacts API with identifying fields like name and email.
Text entries attached to a contact that capture interactions and details.
Trigger reminders and create tasks based on contact activity data from the API.
Automatically tag and segment contacts as they engage with campaigns and notes.
Aggregate notes from the API into Postscript for richer campaigns.
Create an API key with the required scope (contacts.readonly) and secure it properly.
Set the GHL base URL in Postscript and map fields between systems.
Run test requests, verify data sync, and go live with your workflow.
No coding is required for a basic setup. The Postscript connector can map fields and set up automated flows using the UI. For advanced automations, you can extend with custom scripts if needed, but it’s not required for standard use.
At minimum, use GET /contacts/:contactId to retrieve records and POST /contacts/ to create new ones. Also include related endpoints for notes and tasks as your workflow demands.
Authenticate with your API key and include the required scope (contacts.readonly). For write actions, use a key with write permissions and follow secure storage practices.
Yes. You can update contact fields, notes, and tasks via the respective endpoints. Ensure you handle concurrency and error states in your app.
Yes, there are rate limits that apply per account. If you hit a quota, space out requests or use batching where appropriate.
Check endpoint responses, verify credentials, and review logs in Postscript and your API provider. Use test modes and mock data to isolate issues.
API docs are available in the official developer portal. Look for the Contacts API reference and the Postscript integration guide.
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