Calculate

You can run a Calculator MCP Server to let a language model perform arithmetic through a browser automation-enabled calculator. It exposes basic operations like add, sub, mul, div, mod, and sqrt, and can be accessed either locally via an npx-run server or remotely through an SSE endpoint.

How to use

You start the Calculator MCP Server either as a local stdio service or as a remote HTTP-enabled endpoint. To use it, launch the server and connect your MCP client to the provided SSE URL when using the HTTP route.

Two common connection methods are available: an in-process stdio style command you run to start the server locally, and an HTTP SSE endpoint you connect to from your MCP client. The server exposes calculator-like operations that you can call from your client to perform arithmetic inside a browser context.

{
  "mcpServers": {
    "calculate": {
      "url": "http://localhost:8931/sse"
    }
  }
}

Core capabilities

Available operations are add, sub, mul, div, mod, and sqrt. These map to arithmetic actions you can request from your MCP client, which the server executes via browser automation.

Available tools

add

Add two numbers and return the result.

sub

Subtract the second number from the first and return the result.

mul

Multiply two numbers and return the result.

div

Divide the first number by the second and return the result.

mod

Compute the modulus of the first number by the second.

sqrt

Compute the square root of a number.