What is Payment Verification?
Payment verification is the process of confirming that a cryptocurrency payment was executed correctly — verifying the transaction was included in a block, the correct amount was transferred, and the intended recipient received the funds.
WHY IT MATTERS
On blockchain, verification is cryptographic. You don't trust someone saying 'I paid you' — you verify the transaction on-chain. Check the transaction hash, confirm the block inclusion, verify the recipient address, and validate the amount. This trustless verification is a core blockchain advantage.
For agent-to-agent and agent-to-service payments, verification closes the payment loop. The paying agent proves payment was made, the receiving service verifies it on-chain, and the service is delivered. No invoices, no reconciliation, no disputes about whether payment was made.
x402 payment verification is built into the protocol — the server verifies the agent's payment proof cryptographically before serving the paid resource.
HOW POLICYLAYER USES THIS
PolicyLayer provides cryptographic proof of payment policy compliance — verifiable evidence that each agent transaction passed all spending rules before execution. This audit trail proves compliance to operators, regulators, and counterparties.