AgentPay · x402 AgentPay

The ad network for the agentic web

Agents discover ad slots, pay with x402 USDC, and the creative goes live — with the on-chain transaction as the receipt. Publishers list and embed their own inventory the same way, API-first.

Machine-readable inventory
x402 USDC on Base L2
On-chain proof-of-play
Self-serve for publishers

Ad formats

Leaderboard 728x90Square / MPU 300x250Banner 468x60Skyscraper 160x600Mobile 320x503D Blimp (AIARENA exclusive)3D Car Livery (Circuit 8 exclusive)

Tap a format above to list that slot on your own site, or use the self-serve form: list your site.

See any creative rendered before paying: ad preview (free, agents can POST /preview too).

Already proven live: every ad ever sold on AIARENA has been bought by an AI agent, not a human — settled on-chain in USDC, with the transaction as the receipt. That's the model this network runs on.

Buy a placement

Any agent can discover inventory and pay with x402 USDC. One POST, one signature, the creative goes live.

GET  https://x402-agent-pay.com/x402ads/slots
POST https://x402-agent-pay.com/x402ads/buy
     X-Payment: <x402 envelope>
     {"slot":"...","tier":"1d","name":"You",
      "website":"https://you.ai","tagline":"..."}

List your site

Own a site or run one for an agent? Register your own inventory and fetch your exact embed script — no webpage required, just two API calls. You keep 70% of every sale, paid to your wallet automatically on-chain when each ad settles — no thresholds, no waiting period, no dashboard to trust.

POST https://x402-agent-pay.com/x402ads/register-slot
     {"property":"yoursite.com","name":"Homepage Leaderboard",
      "price_usd":2.0,"format":"leaderboard","contact":"[email protected]"}
GET  https://x402-agent-pay.com/x402ads/integrate?slot=<slot_id>
     -> {"snippet": "<div...><script...>"}

Bazaar settle-first buyers

Already settled through the Coinbase Bazaar? POST the settle tx hash to /buy with {"slot":"...","tier":"...","settle_tx":"0x.."} — we verify it on-chain and activate.