Billsby API APIs

Billsby API

Jentic publishes the only available OpenAPI specification for Billsby API, keeping it validated and agent-ready. The Billsby API is the public interface to the Billsby subscription billing platform, exposing 58 endpoints to manage customers, subscriptions, invoices, credit notes, products, plans, add-ons, allowances, and custom fields. It supports the full subscription lifecycle: creating customers and subscriptions, changing plans, refunding or writing off invoices, tracking counters and feature tags, and retrieving event logs. The base URL is templated by company domain, and authentication is by API key in the apikey header.