---
title: Page Performance Evaluation agent
slug: agent-platform/docs/page-performance-evaluation-agent
createdAt: 2026-08-12T15:37:09.000Z
---

**Page Performance Evaluation** is an agent in Mark (Optimizely Agent Platform). It runs a full Google Lighthouse audit on any live URL. The audit covers Performance, search engine optimization (SEO), Accessibility, and Best Practices. The agent then cross-references findings against a visual screenshot. This step pinpoints root causes and delivers specific, ranked fixes with real metric values.

- **Challenge** – Teams struggle to diagnose why pages underperform. Audit tools surface scores but rarely connect them to root causes, and automated checks miss visual issues entirely.
- **Agent outcome** – It produces a side-by-side view of Lighthouse scores and screenshot findings, identifies root causes, and ranks fixes by impact.
- **Value** – The agent eliminates guesswork by pinpointing exactly what to fix and why. Teams prioritize the improvements with the most impact on page speed, search visibility, and user experience.

## Install agent

:::hint{type="info"}
**Note**

**Mark Administrators**, **Agent Builders**, and users with the **Add, edit, and install specialized agents** attribute for a custom role can add agents to their organization's Mark instance. See [Add users and set permissions.](docId\:pe0pbUJveWrG8ewvZWDRE)
:::

Install the agent from the **Directory**.

1. Go to **Directory > Agents**.
2. (Optional) Enter *Page Performance Evaluation* or use the drop-down list filters to narrow the list.
3. Click **Install** on **Page Performance Evaluation** to add it to your Mark instance.

![](https://api.archbee.com/api/optimize/BrbvVORKJ5iIeSMZye5kI/zNsWRNqIjwr_rPDnJ42vG_page-performance-evaluation-agent.png)

## Use the agent

In [Mark chat](docId\:dtNBEttEGVvkhNkwNypLM), enter *@page\_performance\_evaluation* and provide the following details:

- `Page URL` – Enter the URL of your page.
- (Optional) `Additional Details` – Additional instructions, such as mobile assessment only.

The agent delivers a performance report as a canvas. The report covers scores across all four categories, root-cause findings, and a prioritized fix list.

To use the **Page Performance Evaluation** agent in a [workflow agent](docId:2HD0fUsIsfdek516VtN9l), add it to your workflow. See [Create a workflow agent](docId\:KWaI2TBwD38sN7p74exoy).

## Default agent details

These are the default details for the **Page Performance Evaluation** agent. After you [install the agent in your Mark instance](docId\:mcAiTMVfKFi-B84Vp-U8S), customize these details for your organization's needs. See [Manage agents](docId\:SSeNiblVMXwVvDR_lhtvI) for instructions.

### Input variables

The **Page Performance Evaluation** agent takes the following input:

- `Page URL`
- (Optional) `Additional Details`

### Tools

The **Page Performance Evaluation** agent uses the following tools internally to process your request:

- `analyze_image_content`
- `analyze_pagespeed`
- `create_canvas`
- `reasoning_step`
- `take_webpage_screenshot`

### Default configuration

The agent uses the following default configuration:

- **Inference level** – Standard, which provides fast responses.
- **Files** – None.
- **Output** – Text.

:::hint{type="info"}
**Note**

If you use Opti ID, administrators can turn off generative AI in the Opti ID Admin Center. See [Turn generative AI off across Optimizely applications](docId\:X5U0kKD2azV5cIdNqwGNj).
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