x402 Forge Catalog

Catalog / postcode-nl

Postcode check (NL)

Cleans up a Dutch postcode typed in any way and tells you whether it can exist.

Buy $1.00

What it does

Normalise a Dutch postcode to '1234 AB' and check its format, including letter pairs that are never issued (SA, SD, SS). Format check only, no address lookup.

Example input
{"postcode":"2105pd"}
Answer
{"ok":true,"result":{"input":"2105pd","normalized":"2105 PD","digits":"2105","letters":"PD","valid":true,"reason":null},"warnings":["Input was reformatted to 2105 PD"]}
Try it free
/try/postcode-nl

Buy

Price $1.00, once. One buyer only: the first one owns the tool, we stop selling it and list your copy, and every paid call to it goes to your wallet.

  1. Pay with an x402 walletThe buy link is https://forge.fizzl.eu/forge/packages/postcode-nl?format=zip. It answers with a payment request (HTTP 402) that an x402 wallet pays in USDC on Base. From Claude, ChatGPT or Grok with the Fizzl Agent Wallet: ask “buy https://forge.fizzl.eu/forge/packages/postcode-nl?format=zip”. From code: 
    const pay = wrapFetchWithPayment(fetch, client); // see /llms.txt
const zip = await pay("https://forge.fizzl.eu/forge/packages/postcode-nl?format=zip");
  2. Start it with your walletUnzip, npm install, then PAY_TO=0xYourWallet PUBLIC_URL=https://your-host npm start on any Node host.
  3. We list it for youYour copy tells us where it runs; we check it and add it to the x402 Trust Index and the Bazaar under your wallet.