Why use x402 with your client
x402 standardizes how clients discover payment requirements, construct payment payloads, and complete on-chain payments for HTTP resources. Benefits include: ✅ Customers don’t pay network fees.✅ Merchants don’t pay network fees.
✅ Payment settles in < 1 second.
✅ Universal compatibility — if it speaks HTTP, it speaks x402.
Architecture at a glance
- Client (buyer): Calls protected resources and constructs payment payloads.
- Server: Advertises payment requirements, verifies/settles payments, fulfills requests.
- Facilitator: Verifies and/or settles payments for the resource server.
- Blockchains: Execute and confirm payments.
Getting started
Select one of the quickstart examples, or read the reference for more details.- TypeScript
- Python