# API Docs

- [Received APIs Intro](/api-docs/received-apis-intro.md)
- [Authentication](/api-docs/authentication.md): Automatically authenticate user information.
- [Products](/api-docs/products.md): Fetch product and their pricing
- [Customers](/api-docs/customers.md): Create, update and fetch contracts information.
- [Contracts](/api-docs/contracts.md): Create, update and fetch contracts information.
- [Invoices](/api-docs/invoices.md): Fetch and update invoices information.
- [Usage Reports](/api-docs/usage-reports.md): Automatically collect usage information.