osk-calculators

Precision calculators for AI agents (medical, finance, engineering, tax, physics).

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What it can do

  • Search Calculators: Search osk's precision calculators by topic or keyword (e.g. 'tax', 'glucose', 'loan', 'AASHTO'). Returns matching calculator names and descriptions. Use this first to find the rig
  • Get Calculator: Get the input parameters and price for a specific calculator by its name (path, e.g. '/calc/add'). Call this before call_calculator to know what arguments are needed.
  • Call Calculator: Run a specific calculator with the given arguments. 'name' is the calculator path (e.g. '/calc/add'), 'args' is an object of query parameters (e.g. {a: 2, b: 3}). Returns the computed

What data it sees

Do you need an account

No: the server works without sign-in

Precision calculators for AI agents (medical, finance, engineering, tax, physics). Pay-per-call in USDC via x402 on Base. No API keys.

How to connect

How to connect osk-calculators to Claude

The server address to paste into Claude settings:

https://osk-calculators--naruto0414.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect osk-calculators to ChatGPT

The server address to paste into ChatGPT settings:

https://osk-calculators--naruto0414.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect osk-calculators to Cursor

The server address to paste into Cursor settings:

https://osk-calculators--naruto0414.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (3)

Raw names from tools/list. Only developers need these.

search_calculatorsSearch osk's precision calculators by topic or keyword (e.g. 'tax', 'glucose', 'loan', 'AASHTO'). Returns matching calculator names and descriptions. Use this first to find the right calculator.
get_calculatorGet the input parameters and price for a specific calculator by its name (path, e.g. '/calc/add'). Call this before call_calculator to know what arguments are needed.
call_calculatorRun a specific calculator with the given arguments. 'name' is the calculator path (e.g. '/calc/add'), 'args' is an object of query parameters (e.g. {a: 2, b: 3}). Returns the computed result.