Numbers API

live Reference

Trivia, math, and date facts about numbers via numbersapi.com

4 tools
0ms auth
free tier 50 calls/day

Tools

number_fact required: number

Get an interesting trivia fact about a specific number.

Parameters
Name Type Description
number req number The number to get a fact about (e.g., 42)
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date_fact required: month, day

Get an interesting fact about a specific calendar date.

Parameters
Name Type Description
month req number Month number (1–12)
day req number Day number (1–31)
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math_fact required: number

Get a mathematical fact about a specific number.

Parameters
Name Type Description
number req number The number to get a mathematical fact about (e.g., 1729)
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random_fact

Get a trivia fact about a randomly chosen number.

No parameters required.

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Test with curl

The gateway speaks JSON-RPC 2.0 over HTTP POST. You can test any pack directly from the terminal.

List available tools
bash 
curl -X POST https://gateway.pipeworx.io/numbersapi/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'
Call a tool
bash 
curl -X POST https://gateway.pipeworx.io/numbersapi/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"number_fact","arguments":{"number": 42}}}'

Use with the SDK

Install @pipeworx/sdk to call tools from any TypeScript/Node project.

TypeScript 
import { Pipeworx } from '@pipeworx/sdk';
const px = new Pipeworx();
const result = await px.call("number_fact", {"number":"example"});
ask_pipeworx 
// Or ask in plain English:
const answer = await px.ask("trivia, math, and date facts about numbers via numbersapi");