Online Shipping Calculator MCP MCP server

A free Model Context Protocol server that provides AI assistants with live shipping rates from USPS, UPS, and FedEx, as well as current USPS postage and stamp prices. It requires no API key or account, offering read-only tools for package rate comparisons and stamp denomination calculations.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by OnlineShippingCalculator.com

MCP endpoint (Streamable HTTP)

https://onlineshippingcalculator.com/api/mcp

Vendor documentation

What you can do with it

Find the cheapest shipping rate for a package between US ZIP codes
Calculate required postage and stamp combinations for letters
Determine stamp denominations for large envelopes
Get current postage prices for postcards

Tools advertised by the last live check:

get_shipping_rates
get_postage_price

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http online-shipping-calculator-mcp https://onlineshippingcalculator.com/api/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add online-shipping-calculator-mcp --url https://onlineshippingcalculator.com/api/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable online-shipping-calculator-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "online-shipping-calculator-mcp": {
      "url": "https://onlineshippingcalculator.com/api/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "online-shipping-calculator-mcp": {
      "type": "streamableHttp",
      "url": "https://onlineshippingcalculator.com/api/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start online-shipping-calculator-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "online-shipping-calculator-mcp": {
      "type": "http",
      "url": "https://onlineshippingcalculator.com/api/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http online-shipping-calculator-mcp https://onlineshippingcalculator.com/api/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "online-shipping-calculator-mcp": {
      "url": "https://onlineshippingcalculator.com/api/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "online-shipping-calculator-mcp": {
      "serverUrl": "https://onlineshippingcalculator.com/api/mcp"
    }
  }
}

See all 353

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