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

Idempotency

Learn how idempotency can protect you from accidental duplicate payments through the Payment API.

Updated 8 days ago

Suspected duplicate transactions