RPN Calculator

com.apishedPublished by apished.comOfficial publisherv1.0.0Updated Oct 25, 2026

Evaluates Reverse Polish Notation (postfix) expressions: arithmetic, trig, logs, bitwise ops.

The publisher's own server: APIShed

VerifiedStreamable HTTPWeb executableDeveloper Tools

Overview

AI-generated overview

A remote MCP server that evaluates Reverse Polish Notation (postfix) expressions, letting an assistant compute arithmetic, trig, logarithms and bitwise results.

What you can do
Evaluate a single postfix expression given as whitespace-separated tokens, where each token is a number or an operator/function that pops operands off a stack and pushes the result. Supported operations include arithmetic, exponentiation and modulo, roots, trigonometry, logarithms, rounding, bitwise operations and constants.
When to use it
Useful when you want an assistant to compute postfix expressions or verify RPN results without doing the stack evaluation itself. It is a narrow single-purpose calculator, so it only helps with expression evaluation.
Requirements
A remote streamable HTTP endpoint; no packages, environment variables or headers are declared. No authentication is declared.
Before you install
No credentials, payments or write actions are shown. Expressions are sent to a third-party endpoint, so avoid including sensitive values in them.

Installation

In SourceWeft

  1. Open RPN Calculator in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/com.apished%2Frpn-calculator/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "rpn-calculator": {
      "type": "http",
      "url": "https://apished.com/mcp/v1/rpncalc"
    }
  }
}

Tools

1

rpncalc_eval

Evaluates a Reverse Polish Notation (postfix) expression: whitespace-separated tokens, each a number or an operator/function that pops its operands off a stack and pushes the result. Supports arithmetic, exponentiation/modulo, roots, trigonometry, logarithms, rounding, bitwise ops, and constants (pi, e, phi). Always returns the decimal result — for hex/bin/oct rendering, convert the returned number yourself.

Parametersexprrequired

Version history

1
  1. v1.0.0LatestSep 16, 2026

Score

83% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.

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