> ## Documentation Index
> Fetch the complete documentation index at: https://developer.firstsales.io/llms.txt
> Use this file to discover all available pages before exploring further.

# API Reference

> OpenAPI-backed FirstSales Developer API reference.

The FirstSales Developer API is a versioned public contract under `/api/v1`.

```text theme={null}
https://api.app.firstsales.io/api/v1
```

Use the endpoint pages for request parameters, generated examples, and response contracts.

<Warning>
  Only endpoints shown in this API Reference are public. App-private routes, provider callbacks, tracking pixels, unsubscribe handlers, support/admin routes, and internal cron routes are not supported for Developer API clients.
</Warning>