Use OAuth 2.0 or API keys based on your setup. The requested scope is contacts.readonly for read operations; for changes you’ll need contacts.write. Store tokens securely and rotate credentials regularly.
Register your app in the GHL developer console, obtain client credentials, and configure redirect URIs. Use the credentials to request access tokens and apply the correct scopes for your SMS-to flows.
GET /contacts/:contactId — Retrieve a single contact GET /contacts/:contactId/tasks — List tasks for a contact GET /contacts/:contactId/tasks/:taskId — Retrieve a specific task GET /contacts/:contactId/notes — List notes for a contact GET /contacts/:contactId/notes/:id — Retrieve a specific note GET /contacts/:contactId/appointments — List appointments for a contact GET /contacts/ — List contacts GET /contacts/business/:businessId — List contacts for a business Scope: contacts.write — Write access to contacts POST /contacts/ — Create a new contact PUT /contacts/:contactId — Update an existing contact DELETE /contacts/:contactId — Delete a contact POST /contacts/:contactId/tasks — Create a task for a contact PUT /contacts/:contactId/tasks/:taskId — Update a task PUT /contacts/:contactId/tasks/:taskId/completed — Mark a task as completed DELETE /contacts/:contactId/tasks/:taskId — Delete a task POST /contacts/:contactId/tags — Add or update tags on a contact
Trigger: An incoming SMS contains contact details; Your App creates or updates the corresponding contact in the Contacts API.
Actions: Create or update the contact via POST /contacts/ and optionally fetch details with GET /contacts/:contactId to confirm; then start a follow-up task with POST /contacts/:contactId/tasks.
POST /contacts/
phone, name, email
Trigger: SMS includes a task description or instruction; map it to the right contact.
Actions: Create a task via POST /contacts/:contactId/tasks
POST /contacts/:contactId/tasks
contactId, task_title
Trigger: SMS contains a command to complete a task.
Actions: Update task completion via PUT /contacts/:contactId/tasks/:taskId/completed
PUT /contacts/:contactId/tasks/:taskId/completed
contactId, taskId
Fast setup with ready-to-use endpoints—no custom server code required.
SMS-driven automations run between Your App and the Contacts API to keep data in sync.
Consolidated data model across Your App and GHL for easier reporting.
An overview of core elements and processes involved in integrating the Contacts API with Your App.
A person in the Contacts API with identifying fields such as name, phone, and email.
A to-do item linked to a contact that can be created, updated, or completed via API calls.
A note attached to a contact for context or history.
A scheduled meeting or call with a contact logged in the system.
Let new contacts text in their details to auto-create or update a contact in the Contacts API and trigger welcome tasks.
Interpret simple commands to create and assign tasks via the API.
Push reminders and sync appointments from GHL to your app through endpoint calls.
Register your app in the GHL developer portal, obtain client credentials, and authorize access to the Contacts API with the required scope.
Define how contact fields from Your App map to the Contacts API fields (name, phone, email, notes, tasks).
Run tests, validate endpoints, handle errors, and move to production with monitoring.
The Contacts API is a RESTful interface that lets your app read and manage contact records, tasks, notes, and appointments. It enables you to keep your SMS-to workflows in sync with your CRM data. By leveraging the API, you can automate onboarding, reminders, and data updates directly from messages. Two-way sync ensures your app and GHL stay in alignment without manual data entry.
Useful endpoints for SMS workflows include GET /contacts/:contactId to fetch contact data and POST /contacts/ to create new contacts when an SMS arrives. For task management, use POST /contacts/:contactId/tasks to create tasks and PUT /contacts/:contactId/tasks/:taskId/completed to mark them complete. Notes and appointments can be read or created to maintain context around conversations.
Authentication is typically via OAuth 2.0 with client credentials or API keys, depending on your setup. Store tokens securely, refresh regularly, and follow best practices for secure storage. Ensure the scopes include contacts.readonly for reads and contacts.write for changes.
Yes. You can create and update contacts using POST /contacts/ and PUT /contacts/:contactId. Data validation and rate limits apply, so design idempotent calls and handle errors gracefully.
SMS triggers can be parsed to extract commands and fields. Use webhooks or polling to initiate actions in the Contacts API, such as creating a contact or adding tasks based on user input.
Permissions include contacts.readonly and, when you need to modify data, contacts.write. Apply the principle of least privilege and monitor token usage and access.
You can view logs in your app console or in GHL API logs. Look for error responses, implement retry and backoff strategies, and log enough context to diagnose issues quickly.
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Complete Operations Catalog - 126 Actions & Triggers
