FCR-x402 Demo

Instant payments on Filecoin using the x402 HTTP payment protocol and Fast Confirmation Rule (FCR). Sub-minute finality backed by F3 consensus.

Facilitator Status

💳

Buyer Demo

Connect your wallet, sign an EIP-3009 payment, and watch it settle through FCR levels L0→L1→L2→L3.

🏪

Provider Demo

See how a provider receives 402 payments, verifies them via the facilitator, and delivers data.

📊

Dashboard

Monitor FCR status, F3 consensus state, bond exposure, and settlement history in real-time.

How x402 Payments Work


  BUYER                         PROVIDER                      FACILITATOR
    │                               │                               │
    │── GET /api/resource ─────────▶│                               │
    │◀── 402 PaymentRequired ───────│                               │
    │                               │                               │
    │  [signs EIP-3009 off-chain]   │                               │
    │                               │                               │
    │── GET + X-Payment header ────▶│                               │
    │                               │── POST /verify ──────────────▶│
    │                               │◀── { valid: true } ───────────│
    │◀── 200 + Data ────────────────│                               │
    │                               │── POST /settle ──────────────▶│
    │                               │   [commits bond]              │
    │                               │   [submits tx on-chain]       │
    │                               │   [tracks FCR L0 → L3]        │
    │                               │◀── { paymentId, status } ─────│

FCR Confirmation Levels

Submitted

Transaction broadcast

Included

In tipset

FCR Safe

F3 PREPARE/COMMIT

Finalized

F3 certificate

Deployed on Filecoin Calibration Testnet • USDFC Token • x402 Protocol