Overview of invoice API

The Invoice API lets you create, modify, and search invoices in the Helcim merchant platform. Invoices have different names throughout the life-cycles including:

  • Estimates
  • Quotes
  • Purchases
  • Purchase Orders
  • Invoices
  • Orders

These represent the same data-object (named "order"), and is most commonly referred to as an "invoice" through the user interface and merchant tutorials.

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Authentication and general API information

This API is an extension of the Helcim General API. Please refer to the documentation above for information on authentication, security, TLS ciphers and error handling.