Requests to the Contacts API require a valid access token with the appropriate scope (for example, contacts.readonly). Include your token in the Authorization header for every call.
LeadGen App uses the same access token to call endpoints securely. Keep tokens confidential, refresh before expiry, and rotate credentials as part of standard security hygiene.
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 for a contact GET /contacts/:contactId/notes — List notes for a contact GET /contacts/:contactId/notes/:id — Retrieve a specific note for a contact GET /contacts/:contactId/appointments — Get appointments linked to a contact GET /contacts/ — List all contacts GET /contacts/business/:businessId — Get contacts for a business POST /contacts/ — Create a new contact PUT /contacts/:contactId — Update a 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 completed DELETE /contacts/:contactId/tasks/:taskId — Delete a task POST /contacts/:contactId/tags — Attach a tag to a contact
Trigger: when a new contact is created in LeadGen App
Actions: fetch contact details and related tasks to populate the CRM.
GET /contacts/:contactId and GET /contacts/:contactId/tasks
contactId, taskId, status, dueDate
Trigger: new lead created in LeadGen App
Actions: POST /contacts/ to create, then POST /contacts/:contactId/notes to add notes
POST /contacts/ and POST /contacts/:contactId/notes
contactId, notes, createdAt
Trigger: task updated in LeadGen App
Actions: PUT /contacts/:contactId/tasks/:taskId and PUT /contacts/:contactId/tasks/:taskId/completed
PUT /contacts/:contactId/tasks/:taskId and PUT /contacts/:contactId/tasks/:taskId/completed
contactId, taskId, status
Faster onboarding with pre-built endpoints and scaffolding that lets you start automating immediately.
Real-time data synchronization between LeadGen App and the Contacts API ensures up-to-date records across tools.
Secure, scalable access using standard GHL authentication and scopes to protect data.
Key elements include endpoints, triggers, actions, HTTP methods, and the data fields used to move information between the Contacts API and LeadGen App.
A specific URL path and HTTP method used to perform an action in an API.
An event that starts a workflow or automation when a condition is met.
The process of verifying identity and granting access to resources.
A callback URL that receives real-time event notifications from an API.
Merge contact data, notes, and tasks from the Contacts API into LeadGen App to build a comprehensive 360-degree view of each contact.
Automatically create Contacts records and initialize related tasks when a new lead enters LeadGen App.
Attach notes from the Contacts API to leads in LeadGen App to guide timely follow-ups.
Obtain an access token with the correct scope, then test endpoints such as GET /contacts/:contactId.
Choose endpoints that match your automation needs (read-only for viewing, write for updates).
Build your workflows in LeadGen App and monitor logs for failures.
To access the Contacts API, your app must request the appropriate scopes. The provided scope is contacts.readonly, which allows viewing contact records, notes, tasks, and related data. If you need write access, you will require additional scopes such as contacts.write. Always ensure your token is included in the Authorization header and that your application has been granted consent to operate within the GHL environment. In addition to scopes, your integration should follow secure token handling practices: store tokens securely, rotate credentials regularly, and refresh tokens before they expire to maintain uninterrupted access.
Yes. You can fetch a contact’s notes and tasks using endpoints such as GET /contacts/:contactId/notes, GET /contacts/:contactId/notes/:id, GET /contacts/:contactId/tasks, and GET /contacts/:contactId/tasks/:taskId. These endpoints let you assemble a complete activity history for each contact within LeadGen App. When building workflows, consider combining data from notes and tasks to trigger follow-ups or create automated reminders based on task status or note content.
To create a new contact, send a POST request to POST /contacts/ with the required fields (such as name, email, and any custom fields you track). The response will include the new contactId you can use in subsequent calls. If your workflow needs, you can immediately attach notes, tags, or related tasks to the new contact by calling the appropriate endpoints (for example POST /contacts/:contactId/notes or POST /contacts/:contactId/tags).
The authentication flow starts with obtaining an access token that includes the necessary scope for your operations. Use the token in the Authorization header as Bearer
GHL enforces rate limits on API calls to protect the service and ensure fair usage. If you hit a limit, your responses may include headers indicating remaining requests and reset times. Implement exponential backoff and queueing in your app to gracefully handle bursts and retries. For mission-critical integrations, batch requests where possible and design your workflows to tolerate brief pauses during rate-limiting windows.
Attach tags to a contact by calling POST /contacts/:contactId/tags with the tag payload. Tags help classify and segment contacts for targeted automation in LeadGen App. You can add multiple tags in separate requests or in a single batch if your API supports it. After tagging, you can surface these tags in LeadGen App workflows to trigger tag-based automations or filtering.
Yes. To update a task’s status, use PUT /contacts/:contactId/tasks/:taskId/completed to mark the task as completed, or use PUT /contacts/:contactId/tasks/:taskId to update other fields like title or due date. Ensure you pass the correct contactId and taskId and reflect state changes in your app. Remember to handle optimistic concurrency and errors (for example, when a task has already been completed) to keep your data consistent.
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Complete Operations Catalog - 126 Actions & Triggers
