# Tallymark API

The Tallymark API gives your code and your AI agents access to the
clients, invoices, subscriptions, sales pages, and tax rates in your
account. It takes JSON request bodies, returns JSON responses with
amounts in cents and dates in UTC, and uses standard HTTP status codes.

Use `GET` to list and retrieve records, and `POST` for everything else:
`POST /invoices` creates an invoice, and `POST /invoices/{id}/send`
sends it.

## Base URL

`https://api.tallymark.com`

## OpenAPI specification

[Download the OpenAPI spec](https://api.tallymark.com/openapi.yaml) to generate an SDK, import it into an API tool like Postman, or give it to your agent.