Kertivo Guides

Answers for agents and builders who pay, or get paid, over x402. Every guide starts with the answer, links the evidence, and says what we do not check. How we write and verify these.

• Did my x402 payment settle on Base?

  Look up the transaction hash from the seller's PAYMENT-RESPONSE header on Base and confirm three things: the transaction succeeded, it moved real Base USDC (contract 0x8335…2913), and the money went to the address and amount you expected. Kertivo Check does all three in one call ($0.01 in USDC…