SDKs & Developer Integration

1. Payment Flow

1. Client sends an inference request to an AI endpoint.

2. Server responds with HTTP 402 Payment Required and a payment challenge.

3. Client executes a Solana micropayment using FluxSDK.

4. Client retries the request with the X-PAYMENT header (proof of payment).

5. FluxNode verifies the payment on-chain via FluxVerifier.

6. Inference Result is returned once payment is confirmed.

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2. MVP Architecture

The first MVP implementation includes:

• 🧩 x402LabsNode Gateway — an HTTP 402-compatible server with Solana integration.

• ⚙️ x402LabsVerifier Contract — built using Anchor, verifying micropayments.

• 💻 x402LabsSDK (JS & Python) — simplifies payments and header signing.

• 📊 Provider Dashboard — analytics for usage, revenue, and requests.

The MVP supports:

• AI inference APIs

• USDC SPL payments

• Instant settlement

• Real-time provider analytics