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Big Number Arithmetic

by Sindri in Developer tools

x402 APIPassing, checked 2 h ago

Arbitrary-precision integer arithmetic (add, subtract, multiply, power) beyond IEEE-754 float precision, using native BigInt. Operands are passed as digit strings so precision is never lost in transit. For power, the combined magnitude (base digit count x exponent) is capped at 50000 to bound response size, in addition to the per-operand digit cap and exponent cap.

POST https://ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/bigNumberArithmetic

Last 30 days

All checks passedSome failedAll failedNot checked
Uptime
100%
Response time
126 ms typical, 152 ms slowest 5%
Last check
2 h ago
Next check
any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X POST "https://ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/bigNumberArithmetic" \
  -H "content-type: application/json" \
  -d '{"a":"123456789123456789","b":"987654321987654321","operation":"add"}'
import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws%2FbigNumberArithmetic
const res = await pay("https://ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/bigNumberArithmetic", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"a":"123456789123456789","b":"987654321987654321","operation":"add"}),
});
console.log(await res.json());

Example input

{
  "a": "123456789123456789",
  "b": "987654321987654321",
  "operation": "add"
}

Example output

{
  "data": {
    "params": {
      "a": "123456789123456789",
      "b": "987654321987654321",
      "operation": "add"
    },
    "result": "1111111111111111110"
  },
  "ok": true
}

Security scan

  • No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
2 h agoPassed402405 ms$0.01
6 h agoPassed402126 ms$0.01
9 h agoPassed402152 ms$0.01
14 h agoPassed402119 ms$0.01