> ## 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.

> [!NOTE]
>
> Authentication is operation-specific. Where declared, Developer API operations use Developer API key bearer tokens. Endpoints marked `bearerAuth` retain the legacy-compatible bearer scheme. Product MCP OAuth grants apply only to `/mcp`; the OpenAPI `oauthBearer` scheme remains reserved for future public OAuth operations.

> [!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.

## Campaign activation

CLI stable `0.1.10` includes four campaign activation controls. Their public API adapters await deployment and are therefore described with prerequisites in [campaign activation](/docs/campaign-activation). Existing generated endpoint pages remain the published API snapshot; a CLI package release does not deploy a route.


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