Integrations
Connect Invoice Maker with the tools you already use
Automate your invoicing workflow by connecting to payment gateways, accounting software, CRMs, cloud storage, and more.
26+
Integrations
12
Categories
6,000+
Apps via Zapier
REST API
Full Access
Automation
2 integrations
Payments
3 integrations
Communication
7 integrations
WhatsApp Business
Send invoices and payment reminders directly via WhatsApp.
Slack
Get notified in Slack when invoices are paid, overdue, or quotations accepted.
Microsoft Teams
Team notifications for invoice and quotation events.
SMS (Twilio)
Send payment reminders and overdue notices via SMS.
Resend
Modern email API for developers. Send invoices with high deliverability. 3,000 free emails/month.
Gmail
Send invoices directly from your Gmail account. Easy setup with App Password.
Custom SMTP
Send invoices and quotations from your own email domain via any SMTP server.
Cloud Storage
2 integrations
Accounting
3 integrations
Time Tracking
2 integrations
E-Commerce
1 integration
E-Signature
1 integration
Tax & Compliance
1 integration
Analytics
1 integration
Developer Tools
2 integrations
Webhooks
Send real-time events to any URL when invoices, quotations, or payments change.
REST API
Full programmatic access. Create, read, and update invoices, quotations, and customers.
How integrations work
Generate API Keys
Create an API key from your dashboard with read, write, or full access scope.
Connect Your Tools
Use webhooks for real-time events or the REST API to build custom integrations with any platform.
Automate Everything
Invoices sync to your accounting software, payments trigger notifications, and reports build themselves.
Popular workflows
Auto-sync to QuickBooks
When an invoice is paid, automatically create a matching entry in QuickBooks for your accountant.
Webhooks + QuickBooksSlack payment alerts
Get a Slack message in your #payments channel the moment a customer pays an invoice.
Webhooks + SlackShopify order invoicing
Automatically generate and send professional invoices for every Shopify order.
Zapier + ShopifyTime-to-invoice pipeline
Track time in Toggl, then one-click generate invoices from your logged hours.
Toggl Track + APIGoogle Drive backup
Every invoice and quotation PDF is automatically saved to a shared Google Drive folder.
Zapier + Google DriveCRM deal-to-invoice
When a HubSpot deal closes, auto-create an invoice with the deal amount and contact info.
HubSpot + APIFrequently asked questions
Generate an API key from your dashboard under Integrations > API Keys, then use it in Zapier's webhook or custom integration setup. You can trigger Zaps on invoice creation, payment, and more.
Yes. Use our webhooks to automatically sync invoices, payments, and customer data to QuickBooks whenever events occur in your account.
Absolutely. Set up a webhook endpoint that posts to your Slack channel via Slack's incoming webhooks. You'll get real-time alerts when invoices are paid, overdue, or cancelled.
The Basic plan includes API access with 100 requests per minute, 2 API keys, and 2 webhook endpoints. The Pro plan increases these limits significantly.
Invoice Maker integrates with Stripe, Razorpay, and PayPal for accepting payments directly on invoices. You can also build custom payment flows using our REST API.
Webhooks send real-time HTTP POST notifications to your server when events happen — like an invoice being created, paid, or overdue. Each delivery includes a signed payload for security.
Explore more
Ready to automate your invoicing?
Start for free. Connect your tools in minutes with our API and webhooks.