Site Scanner MCP Server — ChatGPT setup guide

Connect ChatGPT to Evinced Site Scanner MCP and ask ChatGPT about your accessibility scan results in plain language. A workspace admin adds the plugin once; then each person connects their own Evinced account.

The setup at a glance

Part 1 · Add the plugin

ChatGPT workspace admin, once

1. Open Plugins
2. Choose Create MCP plugin
3. Enter the name and URL
4. Sign in to Evinced
5. Review and publish

Part 2 · Start using it

Everyone, once each

6. Connect your Evinced account
7. Pick it in a chat
8. Confirm the connection
9. Ask a real question

You need an admin or owner role in a ChatGPT Business or Enterprise workspace, an Evinced Site Scanner account, and about 10 minutes.

Not an admin?

Where your workspace allows it, add the plugin just for yourself: in ChatGPT, Plugins › Add › Add custom MCP server, with the same name and URL, then Create as a plugin.

What you’ll enter

Every value used in step 3. Copy them exactly.

Field	Value
Custom name	Evinced Site Scanner
MCP Server URL	https://site-scanner-mcp.evinced.io/mcp
Authentication	OAuth, already selected
Advanced authentication settings	Leave as they are
Description (optional)	Accessibility scan results
Icon (optional)	The Evinced icon, or none

Good to know

• Nothing else to configure. ChatGPT reads the server’s sign-in settings on its own, so the advanced settings stay as they are.
• Everyone signs in as themselves. Each person connects their own Evinced account (step 6) and sees only what that account can access.
• Three tools can make changes. Create Property adds a property to your account. Preprocess Scan and Clear Cache only manage cached scan data. An admin can switch tools off for the workspace (step 5).

Part 1 · Add the plugin

A ChatGPT workspace admin does this once.

Step 1 · Open Plugins

Adding a plugin for your whole workspace takes an admin or owner role.

1. Go to admin.openai.com, choose your ChatGPT workspace and open Plugins.
2. Click + Add.

Step 2 · Choose Create MCP plugin

The Site Scanner server is hosted online, so the plugin is made from its URL.

1. In the Add menu, click Create MCP plugin.

Note

Upload plugin and Import marketplace are for packaged plugins.

Step 3 · Enter the name and URL

The New custom plugin dialog opens.

1. Custom name: Evinced Site Scanner

2. MCP Server URL:

   https://site-scanner-mcp.evinced.io/mcp

3. Tick I understand and want to continue.

4. Click Create.

Note

Keep Authentication on OAuth. The description and icon are optional.

Step 4 · Sign in to Evinced

ChatGPT opens an authorization window so it can read the server’s tools.

1. Sign in with your Evinced account in the window that opens.

   

   The dialog waits for your sign-in

   

   Sign in to Evinced

2. Back in the Admin Console, open Evinced Site Scanner in your workspace’s plugin list.

Note

If the dialog is still open after you sign in, close it and reload the page.

Step 5 · Review and publish

A new plugin stays switched off until an admin reviews it.

1. On the plugin’s page, click Review app.

   

2. Open each Review potential risk item, tick its boxes and go Back.

3. Click Publish.

   

Evinced Site Scanner now shows as Enabled in your workspace’s plugins, available for everyone to install.

Developer details censored for this guide

Note

In the review dialog, Role access and Configure tools limit who can use the plugin and which tools it offers.

Part 2 · Start using it

Everyone does this once, each with their own Evinced account.

Step 6 · Connect your Evinced account

1. In ChatGPT, open Plugins, choose your workspace’s tab and click + on Evinced Site Scanner.

   

2. Sign in with your Evinced account in the tab that opens.

   

3. Back in ChatGPT, the plugin is installed: you’re connected.

   

Step 7 · Pick it in a chat

ChatGPT uses installed plugins when they fit. Picking it yourself makes sure.

1. In the message box, click +.
2. Type Evinced and choose Evinced Site Scanner.

Note

You can also type @ in the message box and pick the plugin from the list. In Work mode, click Plugins under the message box.

Step 8 · Confirm the connection

The Who Am I tool only reads. It’s the quickest way to check which account ChatGPT is using.

1. With the plugin picked, ask:

   run your whoami tool.

2. ChatGPT replies with your Evinced account and tenant.

Account details censored for this guide

Note

Do this first in a new chat: ChatGPT asks you to confirm the tenant before it fetches any data.

Step 9 · Ask a real question

Ask in plain language. ChatGPT picks the Site Scanner tool that fits.

1. In the same chat, ask about your sites, for example:

   List my properties as a table: name, latest scan date and score.

2. ChatGPT runs the matching tool (here, List Properties) and answers from your live Site Scanner data.

Property names, dates and scores censored for this guide

Work mode and Codex

The plugin also works where ChatGPT runs tasks. In Work mode, click Plugins under the message box, choose Evinced Site Scanner, and ask as in steps 8 and 9.

Don't add the server with codex mcp add

Evinced’s sign-in accepts ChatGPT’s own sign-in route only. If you add https://site-scanner-mcp.evinced.io/mcp directly with codex mcp add, signing in fails with Callback URL mismatch. Use the plugin, as above.

If something goes wrong

What you see	What to do
No “Create MCP plugin” when you click Add	Only workspace admins and owners can add plugins in the Admin Console. On Enterprise, also switch on Create plugins with MCPs under Workspace settings › Permissions & roles.
“Could not complete this request” when you click Create	A plugin for the same server URL already exists, for example one you added just for yourself. Delete that one, then create the plugin again.
Evinced Site Scanner isn’t listed in Plugins	An admin hasn’t published it yet, or your role doesn’t have access to it. Ask an admin to check the plugin’s Role access.
ChatGPT asks you to confirm the tenant	That’s the server’s first check in a new chat. Confirm it, or run whoami first (step 8).
Wrong Evinced account after you connect	In Plugins, open ⋯ on Evinced Site Scanner and choose Uninstall, then add it again (step 6). The sign-in asks for your credentials each time.

Still stuck?

Email support@evinced.com and include the server URL, https://site-scanner-mcp.evinced.io/mcp.

That’s it

Evinced Site Scanner is ready in ChatGPT. Each person connects their own Evinced account once.

How to use itWhat to ask once it's connected, with example prompts.

Claude setup guideAdd the same server to your Claude organization.

Gemini Enterprise setup guideAdd the same server to Gemini Enterprise.

Privacy policyWhat the Site Scanner MCP Server handles, and why.