Your Local Agent Balance (Client)
USDC
Model Provider Earnings (Merchant)
USDC
Inference Gateway Simulatorx402 Protocol Sandbox
Real-time API LogsNetwork headers & state
SYSTEM: Gateway Nanopayments listener active.
SYSTEM: x402 HTTP handler initialized.
Visual Nanopayment Authorization Flow
STEP 1
Client Agent
Sends Prompt API
STEP 2
402 Required
Server demands USDC
STEP 3
Generate Proof
Cryptographic approval
STEP 4
200 OK Output
USDC Settled, API Runs
High-Frequency Netting & Batching Dashboard
Aggregates off-chain API micro-transactions and periodically settles Merkle roots on-chain.
Total Off-Chain Txs
Pending Queue
On-Chain Batches
Gas Savings (Est.)
Off-Chain Ledger Transactions
Tx IDAmountSenderStatus
Merkle Proof Verification Panel
Select a "BATCHED" micropayment from the list to display and verify its Merkle proof on-chain.
x402 HTTP Standard

The standard header protocol for API-native Web3 billing. Allows service providers to return an standard HTTP 402 with structured parameters detailing payment addresses and sub-cent USDC requirements.

Zero-Gas Settlement

By caching nanopayment channels off-chain and utilizing Circle's Gateway backend ledger, thousands of high-frequency AI agent API requests settle instantly. The total volume is then batched on-chain onto Arc L1 with zero gas footprint per call.

Agent Compatibility

Autonomous AI agents require frictionless, prompt-based payments without manual browser wallet approval popups. Gateway Nanopayments allow pre-authorized budgets that sign payment tokens programmatically.