Word wrap

Wrap text to a specified column width, breaking at word boundaries. Words longer than the width are forcibly broken. An optional indent string is prepended to each line. Deterministic, pure CPU.

Input

Field	Type	Description
text *	string	The text to wrap
width	integer	Maximum line width in characters (default 80, max 500)
indent	string	String to prepend to each line (default "")

Example output

{
  "result": "The quick brown fox\njumps over the lazy\ndog.",
  "lines": 3,
  "longestLine": 19
}

Try it — see the 402 challenge (free)

curl -i -X POST https://agent402.tools/api/word-wrap \
  -H "Content-Type: application/json" \
  -d '{"text":"The quick brown fox jumps over the lazy dog.","width":20}'

The response is HTTP 402 Payment Required with exact payment requirements. Any x402 v2 client pays automatically and retries:

Paid call (JavaScript agent)

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client();
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/word-wrap", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "text": "The quick brown fox jumps over the lazy dog.",
    "width": 20
  }),
});

No wallet? Pay with compute

This is a pure-CPU tool, so an agent without a wallet can pay with proof-of-work instead of USDC: fetch a challenge, solve the sha256 puzzle (16 leading zero bits — a fraction of a second of CPU, no money, no AI tokens), and resend with the X-Pow-Solution header.

import { createHash } from "node:crypto";
const lz = (b) => { let t = 0; for (const x of b) { if (!x) { t += 8; continue; } t += Math.clz32(x) - 24; break; } return t; };
const c = await (await fetch("https://agent402.tools/api/pow/challenge?slug=word-wrap")).json();
let n = 0;
while (lz(createHash("sha256").update(c.challenge + ":" + n).digest()) < c.difficulty) n++;
await fetch("https://agent402.tools/api/word-wrap", { method: "POST", headers: { "X-Pow-Solution": c.token + ":" + n, "Content-Type": "application/json" }, body: JSON.stringify({"text":"The quick brown fox jumps over the lazy dog.","width":20}) });

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