validator

Pre-flight integrity check for any text your agent processes or publishes. Catches prompt injection, invisible Unicode, homoglyphs, and LLM watermarks, the silent failures most pipelines ship past. POST text, get clean text plus flags and a risk score. Sub-50ms, deterministic, cacheable.

Call it in 30 seconds

// npm i x402-fetch viem
import { wrapFetchWithPayment } from "x402-fetch";
import { createWalletClient, http } from "viem";
import { privateKeyToAccount } from "viem/accounts";
import { base } from "viem/chains";

const account = privateKeyToAccount(process.env.PRIVATE_KEY); // funds USDC on Base
const wallet = createWalletClient({ account, chain: base, transport: http() });
const fetchWithPay = wrapFetchWithPayment(fetch, wallet);

// Pays the $0.005 USDC automatically on the 402, then returns the real response:
const res = await fetchWithPay("https://x402-validator.odd-dust-5f53.workers.dev/", { method: "POST" });
console.log(await res.json());

# pip install x402 eth-account httpx
import os, asyncio
from eth_account import Account
from x402.clients.httpx import x402HttpxClient

account = Account.from_key(os.environ["PRIVATE_KEY"])  # funds USDC on Base

async def main():
    async with x402HttpxClient(account=account) as client:
        # x402 handles the 402 -> pay ($0.005 USDC) -> retry automatically
        r = await client.get("https://x402-validator.odd-dust-5f53.workers.dev/")
        print((await r.aread()).decode())

asyncio.run(main())

# 1) An unpaid request returns HTTP 402 with the exact payment terms:
curl -i "https://x402-validator.odd-dust-5f53.workers.dev/"

# 2) Paying + retrying requires an x402 client that can sign the USDC
#    authorization (curl alone cannot). See the JS / Python tabs below.

New to x402? Read the 5-minute quickstart →