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osrs-calc-mcp

osrs-calc-mcp

by rocnubie
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OSRS Calc MCP Server

OSRS Calculator - XP, Goals and Time to 99 | OSRS Calc

MCP Badge Stdio Transport Node License: MIT Read Only MCP

A Model Context Protocol server that exposes the canonical OSRS Calc knowledge surface — calculators, training plans, and reference data, FAQ, official links — to MCP-compatible AI clients such as Claude Desktop, Cursor, Windsurf, and Continue. Read-only, no API keys, no quota, ~50 ms cold start.

Official website: https://osrs-calc.com

🧮 About OSRS Calc

OSRS Calc is a browser-based Old School RuneScape planning toolkit. Its skill calculators estimate XP, actions, hours, and time to a target level across 24 skills, including Sailing.

The site also exposes DPS, Max Hit, Dry, Combat Level, prices, and wiki reference tools. This MCP provides the public calculator catalog and data caveats as read-only context; it does not access a player's account or promise that prices and wiki data are current outside the live site.

Old School RuneScape, RuneScape, and related names are owned by their respective rights holders. Check the live calculator and OSRS Wiki sources before making an in-game decision.

Related MCP server: Wiki OSRS MCP

Tools

get_calculator_overview

Return the calculator workflows and reference-data boundaries the site exposes. (OSRS Calc)

Input: no parameters. Returns: text/markdown.

get_official_links

Return the canonical list of official links for OSRS Calc (website, support, docs when available).

Input: no parameters. Returns: text/markdown.

Resources

  • site://osrs-calc/calculators — Public calculator workflows, training targets, and reference-data boundaries.

  • site://osrs-calc/faq — Short FAQ generated from public site metadata.

  • site://osrs-calc/links — Canonical URLs to share with users.

Prompts

tell_me_about_osrs_calc

Summarize what the site is, who it's for, and how it works. — OSRS Calc

plan_a_calculation_osrs_calc

Choose a calculator workflow while respecting the site's data scope. — OSRS Calc

Installation

Install via Smithery

npx -y @smithery/cli install osrs-calc-mcp --client claude

(Replace claude with cursor, windsurf, or continue for those clients.)

Install from source

git clone https://github.com/rocnubie/osrs-calc-mcp.git
cd osrs-calc-mcp
pnpm install

Then add to your MCP client config (claude_desktop_config.json for Claude Desktop, mcp.json for Cursor / Windsurf / Continue):

{
  "mcpServers": {
    "osrs-calc-mcp": {
      "command": "node",
      "args": [
        "/absolute/path/to/osrs-calc-mcp/src/index.mjs"
      ]
    }
  }
}

Debug with MCP Inspector

npx @modelcontextprotocol/inspector node src/index.mjs

Official Links

Development

pnpm install
pnpm start                 # run the server over stdio

License

MIT

Available Tools

2 tools
get_calculator_overviewA

Return the calculator workflows and reference-data boundaries the site exposes. (OSRS Calc)

Inputs: no named parameters.

get_official_linksA

Return the canonical list of official links for OSRS Calc (website, support, docs when available).

Inputs: no named parameters.

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

Loading tool schema changelog…

    Deploy Server
    One endpoint for every MCP toolRayrun runs every MCP server behind one URL and holds the credentials. Each call is decided per client, tool, and argument, then recorded.ray.runAd

    TDQS

    A3.9/5.0

    Scored across 2 tools

    Disambiguation5/5

    The two tools have clearly distinct purposes: one provides an overview of calculator workflows, the other returns official links. No overlap or ambiguity.

    Naming Consistency5/5

    Both tools follow a consistent 'get_' prefix pattern, making the naming predictable and uniform.

    Tool Count2/5

    With only two informational tools, the server feels severely under-scoped for a 'calculator' server. Users would expect actual calculation tools.

    Completeness1/5

    The server name suggests calculations, but no actual calculation tools are provided. The two tools only offer metadata (overview and links), leaving a massive gap in core functionality.

    Resources

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