MCP Server

A calculation engine
for AI agents.

Model Context Protocol (MCP) is an open standard for connecting tools to AI assistants — the same way a browser exposes APIs to web pages. CalcFleet implements MCP so any compatible assistant can run deterministic, Zod-validated financial and practical calculations instead of guessing the arithmetic.

Connect

Free during launch

Endpoint

https://calcfleet.com/api/mcp   (Streamable HTTP)

MCP config

{
  "mcpServers": {
    "calcfleet": {
      "url": "https://calcfleet.com/api/mcp"
    }
  }
}

Add this to your agent's MCP configuration (Claude Desktop, Claude Code, or any MCP-compatible client). No API key required.

Why determinism matters

Language models approximate. CalcFleet calculates. Every tool accepts a strictly typed input, validates it server-side with Zod, runs the same arithmetic the web UI uses, and returns a structured JSON result. No hallucinated numbers, no rounding guesses.

  • ValidatedInputs pass Zod schemas before any math runs — bad inputs return a structured error with per-field issues, never NaN.
  • TestedEvery calculator has a test suite verifying the math against hand-checked numbers — the same code serves the web UI and MCP.
  • StructuredErrors come back as typed MCP content with isError: true and a JSON body — easy for agents to handle gracefully.

Tool catalog

32 tools

Every calculator in the fleet is exposed automatically — no configuration needed when new tools are added.

Custom integrations or volume needs? partnership@calcfleet.com