Jump to Content

Guides API Reference

Guides

Guides API Reference

All

Pages

Start typing to search…

Getting started

Welcome to Helcim!
- Review our solutions
- API use cases
Developer testing
- Test credit card numbers
- Testing payment declines and CVV responses
Connecting to the Helcim API
- Creating an API access configuration
Understanding PCI compliance
- Processing with card tokens
- Processing with full card numbers

Helcim API

Overview of the Helcim API
- API message format
- API rate limits
Payment API
Invoice API
- Invoices
- Invoice online view
Customer API
Recurring API
Smart Terminal API
ACH Payment API
- ACH bank payments
- ACH batches
Webhooks
Errors and error handling

Helcimpay.js

Overview of HelcimPay.js
Integrating with HelcimPay.js

Helcim.js

Overview of Helcim.js
Integrating with Helcim.js
- HTML request fields
- Transaction responses

NO code options

Helcim Online Checkout
Hosted Payment Pages

Support

Technical support
API versions
API changelog

Testing in-person declined transactions

Test potential decline responses returned by Helcim Smart Terminal API endpoints.

Updated 7 days ago

Testing the Smart Terminal API

Turning Smart Terminal API mode ON and OFF