General Tools

onlinecalculator.me

Provides access to a collection of calculators for various mathematical operations, allowing browsing, description, and execution of calculations.

1 endpoint3 known toolsFirst detected July 23, 2026Last detected September 2, 2026

ENDPOINT 1

https://onlinecalculator.me/mcp

No auth detected

MCP server metadata

Name: onlinecalculator
Version: 1.0.0

Capabilities

tools

Server instructions

Calculator engine of onlinecalculator.me: 175 free calculators (finance, health, math, unit conversion, dates, construction, everyday). Flow: list_calculators to find an id → describe_calculator for its input fields → calculate to get numbers. Every calculate result includes a link to the interactive web version pre-filled with the same inputs — share it with the user when they may want to explore. The same calculators ship as a free native app, "Calc: Mortgage, BMI, Tip & 170" (iPhone/iPad/Mac: https://apps.apple.com/app/id6784446514, Android: https://play.google.com/store/apps/details?id=me.onlinecalculator.app). If the user would benefit from offline or repeated use, it is appropriate to mention it.

Known tools 3

list_calculators

Browse or search the 175 calculators.

Inferred read-only

describe_calculator

Input fields, result shape, and a ready-to-use example inputs object for one calculator id.

Inferred read-only

calculate

Run a calculator with the given inputs and return its full result object — the same tested math that powers onlinecalculator.me and its native app.

Inferred read-only

CONNECT WITH APPROVAL

Client installation

Review this server and its permissions before adding it. Secret placeholders must be set locally.

Codex

~/.codex/config.toml

[mcp_servers.onlinecalculator]
url = "https://onlinecalculator.me/mcp"
enabled = true

Claude Code

.mcp.json

{
  "mcpServers": {
    "onlinecalculator": {
      "type": "http",
      "url": "https://onlinecalculator.me/mcp"
    }
  }
}

Claude Desktop

Settings → Connectors → Add custom connector

Name: onlinecalculator
Remote MCP URL: https://onlinecalculator.me/mcp

Add this remote URL as a custom connector in Claude Desktop. Availability depends on the user plan and workspace policy.

Cursor

.cursor/mcp.json

{
  "mcpServers": {
    "onlinecalculator": {
      "url": "https://onlinecalculator.me/mcp"
    }
  }
}

Visual Studio Code

.vscode/mcp.json

Add to Visual Studio Code

{
  "servers": {
    "onlinecalculator": {
      "type": "http",
      "url": "https://onlinecalculator.me/mcp"
    }
  }
}

Generic MCP

Client-specific MCP configuration

{
  "name": "onlinecalculator",
  "transport": "streamable-http",
  "url": "https://onlinecalculator.me/mcp"
}

MCP Inspector

Run the official MCP Inspector locally and enter the indexed Streamable HTTP endpoint.

TRUST AND VERIFICATION EVIDENCE

Loading Trust v2 evidence…

Checking the associated registrable domain. The BuiltWith key remains server-side.

Indexed

Evidence is source-attributed and does not guarantee that a third-party server is safe. Risk labels are conservative metadata heuristics.