Who it is for

Agents that need the network state.

• Decide when to send a transaction

How an agent buys it

POST https://a-upgradenet.com/x402/base-block
Content-Type: application/json

{}

1) Answers 402 with the price (PAYMENT-REQUIRED)
2) The agent signs the payment (EIP-3009, USDC on Base) and repeats with PAYMENT-SIGNATURE
3) Receives the result + PAYMENT-RESPONSE

Example response

{
  "status": "completed",
  "chain": "base",
  "chain_id": 8453,
  "block_number": "21000000",
  "timestamp": 1760000000,
  "iso_time": "2026-10-13T00:00:00.000Z",
  "base_fee_gwei": "0.004",
  "gas_used": "12000000",
  "tx_count": 180
}