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The HoopAI Platform Invoices API gives you complete control over your billing workflow. Use it to create and send invoices to contacts, collect manual or automated payments, manage reusable templates, schedule recurring invoice series, generate and send estimates that convert to invoices, and configure late-fee and payment-method rules — all through a single unified REST API.

Base URL

Authentication

Every request must include a Bearer token and the API version header.
See OAuth 2.0 for details on obtaining an access token.

OAuth scopes

Invoices API endpoints support both Location-Access and Company-Access schemes.

Quick start

Create a new invoice for a contact:

Endpoints

  • Payments API — Record payments, manage orders, and handle subscriptions
  • Products API — Add products and pricing as line items on invoices
  • Store API — Configure store-level settings that affect checkout and billing
Last modified on March 5, 2026