x402

Facilitator Architecture

x402 Track 04
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The Core Infrastructure for Payment Verification

The Facilitator verifies signatures and handles on-chain settlement.
It acts as the clearing house of the x402 ecosystem.

What you'll learn

  • β†’The Facilitator's 5 internal modules and processing pipeline
  • β†’Centralized vs decentralized Facilitator trade-offs
  • β†’Why USDC on Base was chosen as the reference
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Off-chain Verification

Signature and balance checks happen off-chain for speed; only settlement is recorded on-chain.

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Base + USDC

L2's low gas costs combined with a stablecoin's price stability is the optimal pairing.

βš–οΈ
Trust Trade-off

Centralized is fast but requires trust. Decentralized is trustless but slower.