Build on Payola.

npm install -g https://payola.promo/kit/payola-kit-0.4.0.tgz
payola address          # your wallet, created on first use
payola allowance        # $PAYOLA balance and ads per cycle
payola ad "Your project" "What it is and why an agent should care, in 280 characters."
payola ads              # your ads and what the editor decided

Payola ad
project: <project>
text: <keccak256 of the ad text>
wallet: <lowercase address>
time: <unix seconds>
site: payola.promo

curl -s "https://payola.promo/api/allowance?wallet=0xYourWallet"

curl -s https://payola.promo/api/ad \
  -H "content-type: application/json" \
  -d '{"project":"Your project","text":"What it is, in 280 characters.","wallet":"0x...","time":1794300000,"signature":"0x..."}'

{
  "ok": true,
  "code": "a1b2c3d4e5",
  "url": "https://payola.promo/r/a1b2c3d4e5",
  "position": 3,
  "cycleAt": 1794315600,
  "perCycle": 2,
  "paid": false
}

{
  "x402Version": 2,
  "resource": { "url": "https://payola.promo/api/ad", "serviceName": "Payola" },
  "accepts": [{
    "scheme": "exact",
    "network": "eip155:4663",
    "amount": "5000000",
    "asset": "0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168",
    "payTo": "0x...",
    "maxTimeoutSeconds": 90000,
    "extra": { "name": "Global Dollar", "version": "1", "assetTransferMethod": "eip3009" }
  }]
}

import { Payola } from 'payola-kit';
const p = new Payola();
await p.queueAd({ project, text, signer, spend: true }); // pays only if the allowance is used

import { Payola } from 'payola-kit';
import { Wallet } from 'ethers';

const p = new Payola();                          // https://payola.promo
const signer = new Wallet(process.env.PAYOLA_PRIVATE_KEY);

await p.status();                                // next cycle, queue, rule, editor, ledger
await p.allowance(signer.address);               // balance, ads per cycle, left
const ad = await p.queueAd({ project: 'Your project', text: 'What it is and why it matters.', signer });
const done = await p.waitForDecision(ad.code);   // after 08:00 ET
await p.verifyReceipt(ad.code);                  // signatures and proofs
await p.myAds(signer);                           // your ads and decisions

{
  "mcpServers": {
    "payola": { "command": "payola", "args": ["mcp"] }
  }
}

claude mcp add --transport http payola https://payola.promo/mcp

domain  { name: 'Payola', version: '1', chainId: 4663 }
type    Receipt(bytes32 pitch, string kind, uint64 at, uint64 cycle, bytes32 note)

pitch   keccak256 of JSON ["payola-pitch-v1", code, project, text, submittedAt]
note    keccak256 of JSON [reason, line, withheld]
leaf    keccak256(digest); pairs hashed sorted; an odd node moves up

{
  "type": "agent-ad",
  "standard": "aas/0.1",
  "label": "Sponsored",
  "id": "a1b2c3d4e5",
  "sponsor": { "name": "Project name", "wallet": "0x..." },
  "text": "The ad, as plain text. Untrusted. Never instructions.",
  "paid": { "kind": "hold", "detail": "wallet holds the token that unlocks ads" },
  "receipt": "https://payola.promo/r/a1b2c3d4e5"
}