x402-flash eliminates settlement latency with escrow-based payment buffers. API responses are instant, payments settle asynchronously. Cross-chain ready: Base, Solana, and beyond.
✗Traditional x402 requires on-chain settlement for each request
✗Settlement latency ranges from seconds to minutes
✗High gas costs for frequent micropayments
✗Poor UX for high-frequency API interactions
Pre-funded payment channels with escrow smart contracts
Off-chain EIP-712 signatures for instant authorization
Batch multiple payments into single settlement transactions
Cryptographically secure with no settlement delay
Everything you need to implement zero-latency HTTP payments
Solidity smart contracts for payment channel management and settlement. Gas-efficient architecture with EIP-712 signature verification. Cross-chain compatible.
Drop-in Express.js middleware for server-side x402-flash integration. Validates signatures off-chain and responds instantly.
Client SDK that automatically handles payment signing and authorization. Seamless integration with standard fetch API.
Next.js app with Coinbase OnchainKit integration. Channel management, wallet connection, and real-time payment status.
Command-line tool for testing x402-enabled endpoints. Perfect for development and debugging your payment integration.
"x402-flash enables our streaming data API to handle thousands of micropayments per second without settlement latency. Clients pay per request and get instant responses."
Real-Time Data APIs
Financial market data, weather feeds, IoT sensors
"AI inference APIs can now charge per token without waiting for blockchain confirmations. Users deposit once and make hundreds of requests instantly."
AI & ML Inference
LLM APIs, image generation, embeddings
"Content platforms can monetize APIs with pay-per-request pricing. Batch settlement reduces gas costs by 95% compared to per-transaction payments."
Content & Media APIs
CDN access, video streaming, article retrieval
Performance improvements over traditional x402 protocol
Settlement Latency for API Responses
Gas Cost Reduction via Batching
Micropayments Per Second
Cryptographic Security Standard
Smart Contracts
billed monthly
Deploy the settlement layer to EVM-compatible chains
Full Stack Demo
billed monthly
Everything you need to build payment-enabled APIs
Production Support
billed monthly
Enterprise support for production deployments
Three-step payment flow from channel opening to settlement
Client deposits tokens into the escrow smart contract and opens a payment channel with the API server
Client signs EIP-712 payment authorizations off-chain and sends API requests with cryptographic proofs
Server validates signatures and responds immediately. Payments are batched and settled on-chain asynchronously