The x402 payment protocol for autonomous agent economies — sub-second finality, sub-cent costs, Ed25519 signing. Agents discover, trust, and pay each other on SVM.
Each product triggers a real SOL-402 payment flow. Click "Buy" to experience the full x402 lifecycle — from payment request to Ed25519 signing and on-chain settlement.
Watch the SOL-402 payment protocol execute step-by-step. Click any product to trigger a live demo.
Agent sends purchase request to merchant
Merchant returns payment requirements
Client wallet signs canonical payment intent
Facilitator verifies signature and settles on-chain
Transaction settled. Receipt issued.
SOL-402 replaces all EVM primitives with Solana-native equivalents while extending the spec with SVM-specific capabilities.
Metaplex NFT-based agent identities with PDA-derived accounts. CAIP-2 global addressing.
On-chain feedback signals with proof-of-payment Sybil resistance. Tag-based composability.
Pluggable trust models: TEE attestation, zkML proofs, crypto-economic re-execution.
HTTP 402 Payment Required flow with Ed25519 signed intents. SOL & USDC-SPL.
Multi-strategy resolution: SNS domains, well-known URLs, on-chain lookups, CAIP-10.
Product catalog with deterministic pricing. A2A agent cards with SOL-402 extensions.
Powered by Google Gemini. Ask about products, pricing, how the protocol works, or request a purchase — the AI orchestrates the full x402 payment flow.
Orders-of-magnitude improvements across every metric that matters for agent economies.
| Metric | EVM (ERC-8004) | SVM (SOL-402) | Improvement |
|---|---|---|---|
| Payment Finality | ~12 sec | ~0.4 sec | 30× |
| Transaction Cost (payment) | $0.50 – $5.00 | $0.0005 | 1,000 – 10,000× |
| Transaction Cost (feedback) | $0.20 – $2.00 | $0.0005 | 400 – 4,000× |
| TPS Capacity | ~15 | ~4,000 real | 267× |
| Parallel Transactions | No | Yes (Sealevel) | SVM-native |
| Signing | EIP-712 / ECDSA | Ed25519 | Faster verify |
| Identity | ERC-721 NFT | Metaplex NFT (PDA) | Native |
| Name Service | ENS | SNS (Bonfida) | Integrated |