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

# Test in the web preview

> Run simulated calls before you route live traffic to an agent.

Use the web preview to test a draft agent through your browser microphone or text chat. A simulated call lets you check the conversation without assigning a phone number.

## Start a simulated call

<Steps>
  <Step title="Open a draft">
    Open **Agents**, select an agent, and make the draft you want to test active in the builder.
  </Step>

  <Step title="Set test variables">
    In the preview, enter values for any dynamic variables the agent expects. Use test data only.
  </Step>

  <Step title="Start talking">
    Select **Start talking** and allow microphone access when your browser asks. For a text-only test, select **Start chatting** instead.
  </Step>

  <Step title="Exercise the call">
    Test the expected path, missing information, interruptions, silence, and requests that should invoke an action.
  </Step>
</Steps>

## What to verify

* The greeting matches the call direction and opening mode.
* The agent asks one clear question at a time.
* Knowledge answers stay grounded in the connected sources.
* Actions receive the required values and handle failures safely.
* Transfers and call endings happen only under the intended conditions.
* The agent responds correctly when a caller interrupts or pauses.

Change the prompt, flow, knowledge, or settings when a test fails. Start a new simulated call after each meaningful change.

<Tip>
  Test with several speakers and audio environments. A successful happy-path call does not cover interruptions, background noise, or ambiguous answers.
</Tip>

## Before you publish

Confirm that the draft passes your expected path and important failure paths. Then publish the version and assign it to a deployment path.