---
title: browser.api | Config
outline: deep
---

# browser.api

- **Type:** `number | { port?, strictPort?, host? }`
- **Default:** `63315`
- **CLI:** `--browser.api=63315`, `--browser.api.port=1234, --browser.api.host=example.com`

Configure options for Vite server that serves code in the browser. Does not affect [`test.api`](#api) option. By default, Vitest assigns port `63315` to avoid conflicts with the development server, allowing you to run both in parallel.
