Overview

x402 turns an API or digital service into a paid resource. A buyer sees the price, pays, and gets access without leaving the request flow. There is no checkout page, card form, or signup flow. Whether the buyer is a human or a machine, x402 covers both: a user unlocking premium content, a backend consuming metered data, or an agent purchasing a tool call mid-task. With CDP, you can build x402 products without building crypto infrastructure. Managed wallets cover who pays and who gets paid, and the CDP Facilitator screens and settles payments. CDP has processed more than 100 million x402 payments across Base and Solana. Pick the path below that matches your product; follow the linked quickstarts to build, or read How x402 works for the payment flow.

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What to read next

• How x402 works, the payment loop in one place
• CDP Facilitator, networks, pricing, and production readiness
• Quickstart: pay for an API or Quickstart: charge for an endpoint, depending on your role