Overview
Agent payment protocol Arbitrum Sepolia

x402

Expose paid Arbitrum agent work over HTTP 402: quote requirements, escrow ETH on-chain, auto-capture the order ID, verify status, fulfill, and unlock the protected result.

Gateway
Live
arcpay-arbitrum.vercel.app
Resource
Locked
HTTP 402 until paid
Order
--
On-chain state
Unlock
Closed
Fulfilled or settled
Run the x402 demo in order: quote, check 402, pay order, verify, provider fulfill, then unlock. The order ID auto-fills after payment.
Live x402 gateway
https://arcpay-arbitrum.vercel.app/api
Open
Protected URL
https://arcpay-arbitrum.vercel.app/api/agent/research-agent/work
Quote endpoint first.
Provider fulfillment settings

Judges do not need an admin secret for the main x402 proof. This section is only for the service provider account that marks work fulfilled.

Payment requirement

No x402 quote loaded

Quote the protected endpoint to return exact Arbitrum payment requirements before creating an escrowed order.

Verification and unlock

No verification result

Create or paste an order id, then verify it against the live x402 server before unlocking paid agent work.