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

# Testing

> Use the development publisher token to integrate and test without usage limits.

During onboarding you receive **two publisher tokens**:

* A **development token** for testing and integration work.
* A **production token** that participates in the real auction and generates revenue.

The development token returns Kontext's standard **test ads** — the same creatives you'll see in the example apps. It has **no usage limits**, so you can fire as many `addMessage` calls and render as many ads as you need while you build, test, and demo the integration.

When you're ready to ship, swap the development token for the production token. See [Best practices](/guides/best-practices) for the full pre-launch checklist.