Tools

Create a tool

Open a server and click Create New Tool.

Enter a name such as get_orders.
Add the inputs your code needs.
Write the tool body in the editor.
Keep Active on and click Create.

For an existing tool, click Save after editing.

Parameters

Add a key, type, and description for each input. Mark it optional only when your code can run without it. Available types are string, number, boolean, object, and array. Read inputs from params:

const name = params.name?.trim();

if (!name) {
  throw new Error("Enter a name");
}

return { message: `Hello, ${name}` };

This example needs a required string parameter named name.

Editor

The editor has syntax highlighting and SDK suggestions. Write JavaScript directly. Top-level await and return work inside the tool body. Use Runtime for supported helpers and Examples for complete tool bodies.

Run

Click Run. Fill in the inputs and run the tool. Run fields send text values. Use an MCP client to test typed number, boolean, object, or array inputs, or convert the text in your code. The Output panel shows the result and console messages. Running a tool can call APIs or change data, just like a client call. Save your changes before calling the tool from an AI client.

Start here

Build

Check

Connect

Create a tool

Parameters

Editor

Run

​Create a tool

​Parameters

​Editor

​Run

Create a tool

Parameters

Editor

Run