The one-secret protocol.

No contracts, no deploy scripts, no faucet. OUSD is already live — your app just moves it.

1. 1
   Pick a chain

   Base is cheapest, Tempo is built for payments, Solana is fastest, Ethereum has the deepest liquidity.

2. 2
   Add one secret

   PRIVY_APP_ID from dashboard.privy.io. Add your preview and published domains to Privy's allowed origins and turn on gas sponsorship for your chain.

3. 3
   Paste the prompt

   Every idea page gives a prompt preset for your chain. One message builds the whole app.

4. 4
   Get a little OUSD

   Through Stripe / Bridge / Privy, Coinbase, Visa, Mastercard, or Coinbase / Kraken / Uniswap. Demo with ≤ 1 OUSD.

5. 5
   Prove it

   Every payment shows a link to the chain explorer. That link is your demo.

Chain notes

Sending OUSD

import { encodeFunctionData, erc20Abi, parseUnits } from "viem";

const amount = parseUnits("1.00", decimals); // decimals read from the OUSD contract
await sendTransaction(
  { to: OUSD, data: encodeFunctionData({ abi: erc20Abi, functionName: "transfer", args: [to, amount] }), value: 0n, chainId },
  { address: wallet.address, sponsor: true },
);

const mintInfo = await connection.getAccountInfo(OUSD_MINT);
const programId = mintInfo!.owner;           // Token or Token-2022
const mint = await getMint(connection, OUSD_MINT, "confirmed", programId);
const from = getAssociatedTokenAddressSync(OUSD_MINT, owner, false, programId);
const to = getAssociatedTokenAddressSync(OUSD_MINT, recipient, false, programId);
tx.add(
  createAssociatedTokenAccountIdempotentInstruction(owner, to, recipient, OUSD_MINT, programId),
  createTransferCheckedInstruction(from, OUSD_MINT, to, owner, amount, mint.decimals, [], programId),
);

Common traps

• · Tempo explorer links use /receipt/, not /tx/, and native value transfers revert.
• · Never hardcode decimals — read them from the token.
• · Load Privy only in the browser (lazy + ClientOnly) or the page crashes.
• · Never name a secret VITE_…; read it on the server in a route loader.
• · Wait for confirmation before showing success.

Read the full OUSD skill →