Connect an AI agent to Sign Customiser

You can connect an AI agent to your Store. Examples of AI agents are Claude, ChatGPT, Cursor and VS Code. The agent can set up customisers and change options and pricing. It can also find orders, quotes and revenue summaries.

The agent connects through the Sign Customiser MCP server. You do not need an API key.

The sign-in steps are different for the Shopify app and for web.signcustomiser.com. Use the section for your platform.

Before you start

Use an AI agent that can connect to a remote MCP server, for example Claude, Cursor or VS Code.
On Shopify, only the store owner can generate a connection code.
A connection has access to one Store only. To connect a second Store, connect the agent again. If a Store list shows, select the other Store.

Shopify app

You do not need a web.signcustomiser.com account or password. You sign in with a connection code from the Shopify app.

If your Store has no customiser yet, create your first customiser, then return to the home page. Until then, the home page does not show a link to the MCP server page.

In your Shopify admin, open the Sign Customiser app.
On the home page, select See the setup steps on the AI agent card. The card shows only while no agent is connected to the Store. If the card is not there, select Tools & Settings, then MCP server.
Select Onboard your agent to Sign Customiser. This copies the setup prompt.
Paste the prompt into the chat box of your agent and send it.
The agent adds the Sign Customiser connection and starts the sign-in.
When your browser shows the Enter your connection code screen, return to the MCP server page in the Shopify app. Select Generate connection code.
Type the code in the Connection code field. Then select Continue.
Make sure that the correct Store shows. If you have more than one Store, select it. Select the permissions. Then select Approve.

The code works one time. It expires after 10 minutes. Generate the code when the Enter your connection code screen is open.

web.signcustomiser.com

Sign in at web.signcustomiser.com.
In the sidebar, select MCP Server.
Select Onboard your agent to Sign Customiser. This copies the setup prompt.
Paste the prompt into the chat box of your agent and send it.
The agent adds the Sign Customiser connection and starts the sign-in.
If you are signed in to web.signcustomiser.com in the same browser, the permissions screen opens. Go to step 8.
If your browser shows the Enter your connection code screen, return to the MCP server page. Select Generate connection code. Type the code in the Connection code field. Then select Continue.
Make sure that the correct Store shows. If you have more than one Store, select it. Select the permissions. Then select Approve.

Select the permissions

The permissions that the agent asks for are selected when the screen opens. Clear each permission that you do not want to give the agent.

If the agent must only read data, keep only the permissions that start with View. For example, keep View store details, View customisers, View pricing, View orders, View quotes and View analytics.

If the agent must also make changes, keep the permissions that it needs:

Manage customisers: the agent can create customisers and change their options.
Manage pricing: the agent can change prices.
Create products: the agent can record a product that an enabled custom integration created, against one of your customisers.
Create orders: the agent can create orders. Orders can reach your manufacturer.
Manage webhooks: the agent can add, change and remove webhook subscriptions.
Use advanced tools: the agent can use the full catalogue of operations. Each advanced operation still needs its own permission from this list.

The connection code only signs you in. The agent gets access only when you select Approve.

The screen can show Unverified app. This shows when the agent registered itself. Continue only if you started this connection.

Connect the agent yourself

You can also add the connection in your agent yourself. Use this server URL:

https://mcp.signcustomiser.com

For the steps for Claude, ChatGPT, Cursor, VS Code and other agents, refer to the setup guide. Then do the sign-in steps for your platform.

See or remove a connected agent

Go to Tools & Settings > MCP server. On web.signcustomiser.com, you can also select MCP Server in the sidebar. The Connected agents list shows each agent, who approved it, and its permissions.

To remove an agent, select the revoke button for that agent. Then select Revoke. The agent loses access immediately.

See what an agent did

The MCP server page has two more cards under the Connected agents list.

The Usage card shows how many calls your agents made in the last 30 days. Select View usage for more detail.
The Recent changes card shows how many changes agents made to your Store and the latest change. Select View recent changes to see the full list.

Troubleshooting

The agent asks for an API key. Sign Customiser does not accept API keys for this connection. Use a different agent.
“That code is not valid. Generate a new one in your admin.” The code was used or it expired, or you generated a newer code. You possibly typed it incorrectly. Generate a new code and type it again.
“Too many attempts. Try again in N minutes.” You typed too many wrong codes from this network address. Wait for the time that shows. Then generate a new code and type it again.
“Only the store owner can generate a connection code.” On Shopify, ask the store owner to generate the code.
The agent reports a missing permission. You did not approve that permission. The error shows a short name, for example pricing:write for Manage pricing. Connect the agent again and approve the permission.