How to connect Zapier App Connector to Contacts API for InvoiceXpress integration

Connecting Contacts API to Zapier App Connector for InvoiceXpress automation

Steps to connect the GHL Contacts API with the Zapier App Connector

This guide walks you through linking the GHL Contacts API (Contacts API) to the Zapier App Connector for InvoiceXpress. Learn how to authenticate, select endpoints, and set up reliable automation that keeps your contact data in sync with invoices and billing activities.

Authenticate with the Contacts API (GHL API)

Obtain and securely store an access token or API key for the GHL Contacts API. Use token rotation and least-privilege scopes to keep data safe while enabling the integration.

Authenticate with the Zapier App Connector

Create a secure connection in the Zapier App Connector to allow data to flow between GHL’s Contacts API and InvoiceXpress. Use the connector’s recommended authentication method (OAuth or API keys) and test the connection.

Endpoint overview for the Contacts API

– 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 – 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

Top 3 connection patterns between Contacts API and Zapier App Connector

1) Real-time contact lookup and task sync

Trigger: when a contact is accessed or updated in GHL to keep InvoiceXpress in sync with the latest data.

Actions: Create or update the contact in InvoiceXpress, pull associated tasks and notes, and create or update related records as needed.

GET /contacts/:contactId

Key fields: contactId, name, email

Top 3 connection patterns between Contacts API and Zapier App Connector

2) Batch export for billing cycles

Trigger: scheduled exports at defined billing intervals.

Actions: create invoices in InvoiceXpress from contact data, attach relevant notes and tasks, update records as needed.

GET /contacts/

Key fields: contactId, businessId, name

Top 3 connection patterns between Contacts API and Zapier App Connector

3) Event-driven task completion to invoicing

Trigger: when a task is marked complete in GHL.

Actions: generate or update an InvoiceXpress invoice for the related contact; log activity and statuses.

PUT /contacts/:contactId/tasks/:taskId/completed

Key fields: contactId, taskId, status

No-code benefits of this integration

Automate repetitive data flows between GHL and InvoiceXpress without writing code.

Configure quick, visual automations in the Zapier App Connector with robust error handling and retries.

Scale automations from small teams to enterprise with centralized governance and monitoring.

Key elements and glossary

Core elements include endpoints, authentication, data mapping, error handling, rate limits, and testing to ensure smooth, reliable automation.

GHL

GHL refers to the API platform used to build integrations between services like the Contacts API and InvoiceXpress, enabling automation without custom code.

API Endpoint

A specific URL path you call with HTTP methods to access or modify data in an API.

Authentication

The process of proving identity and authorizing API calls (tokens, OAuth, or API keys) to protect data access.

No-Code Automation

Building integrations and automations using visual builders like the Zapier App Connector, without writing code.

People also Search for:

Creative ideas for connecting GHL Contacts API with the Zapier App Connector

1) Auto-create invoices from contact activity

Trigger on contact updates to automatically generate invoices in InvoiceXpress, ensuring billing reflects the latest customer data.

2) Sync contact notes to billing records

Map notes from GHL to InvoiceXpress to maintain a complete history for each customer and invoice.

3) Weekly sync dashboard for teams

Provide a dashboard showing sync status, errors, and upcoming tasks to improve operations oversight.

3 steps to connect GHL Contacts API with the Zapier App Connector

Step 1: Create and authorize the GHL connection

In GHL, create an API connection that allows Zapier to read contacts, notes, tasks, and related data.

Step 2: Configure the Zapier App Connector

In Zapier App Connector, select the GHL Contacts API and configure authentication, endpoints, and field mappings to InvoiceXpress.

Step 3: Test and deploy

Run end-to-end tests to ensure data flows correctly, monitor for errors, and enable live automation.

Frequently Asked Questions

What is the GHL Contacts API?

The GHL Contacts API lets you read and manage contact data, including their tasks, notes, and appointments. It enables integrations that automate CRM-driven workflows. By connecting it to InvoiceXpress via the Zapier App Connector, you can drive billing activities directly from contact data. This reduces manual data entry and keeps financial records aligned with customer activity. You’ll authenticate to access the API, choose endpoints like GET /contacts/:contactId to pull details, and then push updates to InvoiceXpress as invoices or line items when appropriate.

Yes. With the Zapier App Connector, you can build no-code automations that move data between GHL and InvoiceXpress. You configure triggers, actions, and mappings in a visual editor without writing code. This approach is ideal for teams that want fast, repeatable processes with minimal maintenance.

Common methods are token-based authentication (OAuth or API keys) for GHL and the Zapier connector’s own secure vault for InvoiceXpress. Use tokens with scopes limited to necessary data. Rotate credentials regularly and monitor usage to detect anomalies.

The most frequently used endpoints for syncing and billing include GET /contacts/:contactId to retrieve data, POST /contacts/ to create new records, and PUT /contacts/:contactId/tasks/:taskId to manage tasks. For invoicing, you’ll typically create or update InvoiceXpress records from relevant contact data and task statuses.

Map fields such as contact name, email, and billing address from GHL to InvoiceXpress invoice fields. Use field mapping in Zapier to ensure data types align (strings, dates, currencies) and implement validation checks to avoid failed invoices.

Use the Zapier test interface to simulate triggers and actions. Run end-to-end tests, check the task log, and verify that invoices appear in InvoiceXpress with the correct data. Iterate on mapping and filters until the workflow behaves as expected.

Error logs, run history, and task status are available in both the Zapier App Connector and your GHL instance. Review these logs to identify misconfigurations, authentication failures, or data mapping issues, and adjust the workflow accordingly.

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🚀 GoHighLevel Integration

Complete Operations Catalog - 126 Actions & Triggers

126
Total Operations
55
Polling Triggers
71
Actions
14
Categories
👥

Contacts

10 Triggers 18 Actions
Trigger
Get Contact
Retrieve a specific contact by ID
Trigger
Search Contacts
Advanced search with filters
Trigger
Get Contacts by Business
Retrieve contacts linked to a business
Trigger
Get Duplicate Contact
Check for duplicate contacts
Trigger
Get Contact Appointments
List all appointments for a contact
Trigger
Get Contact Tasks
Retrieve all tasks for a contact
Trigger
Get Contact Task by ID
Get specific task details
Trigger
Get Contact Notes
List all notes for a contact
Trigger
Get Contact Note by ID
Retrieve specific note details
Trigger
List Contacts (Deprecated)
Legacy contact listing method
Action
Create Contact
Add a new contact to the system
Action
Update Contact
Modify existing contact information
Action
Find Contact
Search by email, phone, or ID
Action
Delete Contact
Remove a contact permanently
Action
Upsert Contact
Create or update contact automatically
Action
Add Tags to Contact
Tag contacts for organization
Action
Remove Tags from Contact
Remove specific tags
Action
Bulk Update Contact Tags
Add or remove multiple tags at once
Action
Create Contact Task
Add a new task for a contact
Action
Update Contact Task
Modify existing task details
Action
Complete Contact Task
Mark task as complete
Action
Delete Contact Task
Remove a task permanently
Action
Create Contact Note
Add notes to contact records
Action
Update Contact Note
Edit existing notes
Action
Delete Contact Note
Remove notes from contacts
Action
Add Contact to Campaign
Enroll contact in campaign
Action
Remove from Campaign
Remove contact from specific campaign
Action
Remove from All Campaigns
Unenroll from all campaigns
📅

Calendars & Appointments

13 Triggers 21 Actions
Trigger
List Calendar Groups
Get all calendar groups
Trigger
List Calendars
Retrieve all calendars
Trigger
Get Calendar by ID
Get specific calendar details
Trigger
Get Free Slots
Check calendar availability
Trigger
List Calendar Events
Get all scheduled events
Trigger
List Blocked Slots
View unavailable time slots
Trigger
Get Appointment
Retrieve appointment details
Trigger
List Appointment Notes
Get notes for appointments
Trigger
List Calendar Notifications
View notification settings
Trigger
Get Calendar Notification
Get specific notification
Trigger
List Calendar Resources
View rooms and equipment
Trigger
Get Calendar Resource
Get specific resource details
Action
Create Calendar Group
Set up new calendar group
Action
Update Calendar Group
Modify calendar group settings
Action
Update Group Status
Enable or disable calendar group
Action
Delete Calendar Group
Remove calendar group
Action
Validate Group Slug
Check if slug is available
Action
Create Calendar
Add new calendar
Action
Update Calendar
Modify calendar settings
Action
Delete Calendar
Remove calendar permanently
Action
Create Appointment
Book new appointment
Action
Update Appointment
Modify appointment details
Action
Delete Event
Cancel and remove event
Action
Create Block Slot
Block time on calendar
Action
Update Block Slot
Modify blocked time
Action
Create Appointment Note
Add notes to appointments
Action
Update Appointment Note
Edit appointment notes
Action
Delete Appointment Note
Remove appointment notes
Action
Create Calendar Notification
Set up reminders
Action
Update Notification
Modify notification settings
Action
Delete Notification
Remove notification
Action
Create Calendar Resource
Add room or equipment
Action
Update Calendar Resource
Modify resource details
Action
Delete Calendar Resource
Remove resource
💼

Opportunities

3 Triggers 7 Actions
Trigger
Search Opportunities
Find opportunities with filters
Trigger
Get Opportunity
Retrieve specific opportunity
Trigger
List Pipelines
View all opportunity pipelines
Action
Create Opportunity
Add new sales opportunity
Action
Update Opportunity
Modify opportunity details
Action
Delete Opportunity
Remove opportunity
Action
Update Opportunity Status
Change status (open, won, lost)
Action
Upsert Opportunity
Create or update opportunity
Action
Add Followers
Assign team members to follow
Action
Remove Followers
Unassign followers
👤

Users

4 Triggers 3 Actions
Trigger
Search Users
Find users with filters
Trigger
Filter Users by Email
Search users by email address
Trigger
Get User
Retrieve user details
Trigger
List Users by Location
Get users in specific location
Action
Create User
Add new user to system
Action
Update User
Modify user information
Action
Delete User
Remove user from system
💬

Conversations & Messages

8 Triggers 2 Actions
Trigger
Search Conversations
Find conversations by filters
Trigger
Get Conversation
Retrieve conversation details
Trigger
Get Email by ID
Retrieve specific email
Trigger
Get Message by ID
Get specific message details
Trigger
Get Messages by Conversation
List all conversation messages
Trigger
Get Message Recording
Retrieve voice recording
Trigger
Get Message Transcription
Get transcribed message text
Trigger
Download Transcription
Download transcription file
Action
Update Message Status
Change message read/unread status
Action
Agent Typing Indicator
Show typing indicator in chat
🏢

Businesses

2 Triggers 3 Actions
Trigger
Get Business
Retrieve business details
Trigger
List Businesses by Location
Get all businesses in location
Action
Create Business
Add new business
Action
Update Business
Modify business details
Action
Delete Business
Remove business
🔄

Workflows & Campaigns

3 Triggers 5 Actions
Trigger
List Workflows
Get all workflows
Trigger
List Snapshots
View available snapshots
Trigger
List Campaigns
Get all campaigns
Action
Add Contact to Workflow
Enroll in workflow automation
Action
Remove from Workflow
Unenroll from workflow
Action
Add Contact Followers
Assign followers to contact
Action
Remove Contact Followers
Unassign followers
Action
Bulk Business Update
Add/remove contacts from business
⚙️

Other Operations

20 Triggers 8 Actions
Trigger
List Locations
Get all locations
Trigger
List Custom Fields
View custom field definitions
Trigger
Get Company
Retrieve company information
Trigger
Find Associations
Search associations
Trigger
Get Association
Retrieve association details
Trigger
Get Association Key
Get key by name
Trigger
Get Association by Keys
Find by object keys
Trigger
Get Relations by Record
List record relations
Trigger
Check Blog URL Slug
Verify slug availability
Trigger
Get Blog Authors
List blog authors
Trigger
Get Blog Categories
List blog categories
Trigger
Get Blog Posts
List posts by blog
Trigger
Get Blogs by Location
List location blogs
Action
Find Location by ID
Retrieve location details
Action
Create Location
Add new location
Action
Create Association
Link related records
Action
Update Association
Modify association
Action
Delete Association
Remove association
Action
Create Relation
Establish record relation
Action
Delete Relation
Remove record relation
Action
Create Blog Post
Publish new blog post
Action
Update Blog Post
Edit blog post

✨ Key Capabilities

📊 Contact Management

  • 10 custom field slots per contact
  • Advanced search with filters
  • Duplicate detection
  • Tag management (bulk operations)
  • Full task and note management
  • Campaign & workflow enrollment

📅 Calendar Features

  • Calendar groups with slugs
  • Multiple calendar types
  • Free slot checking
  • Appointment booking system
  • Blocked slots management
  • Room & equipment resources

💼 Sales Pipeline

  • Multi-pipeline support
  • Stage management
  • Status tracking (won, lost, etc)
  • Monetary value tracking
  • User assignment
  • Follower management

🔄 Automation Ready

  • Workflow automation support
  • Campaign management
  • Polling triggers (1-15 min)
  • Real-time conversations
  • Bulk operations
  • Upsert capabilities
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