Pay-per-call AI services. One micro-transaction at a time.
DeepSeek R1 reasoning via x402 micropayments. Ask hard questions, pay per call.
Wallet-based chat interface to discover and use any x402 service. Connect your wallet in USDC/EURC, ask questions, and the agent routes payments automatically. No subscriptions, no API keys — just pay per call.
Real-time weather intelligence, natural event monitoring, and forecasts. Current conditions, severe alerts, earthquakes, and volcanoes — pay per query.
Live flight tracking, aviation weather, and airport intelligence. Ask natural-language questions about aircraft, conditions, and airports worldwide.
Maritime conditions, port information, vessel identification, and marine weather. Navigate smarter with on-demand ocean intelligence.
AI-powered entertainment intelligence — movies, TV, music, gaming, and events. Multi-source reasoning with custom style presets.
Triangulated news analysis from 125+ global sources across 11 regions and 20 languages. Multi-perspective reports with stance classification, wire churn detection, and bias scoring.
Real-time Earth observation, satellite imagery analysis, and geospatial intelligence. Natural disaster tracking, environmental monitoring, and geographic data queries.
Space exploration, satellite tracking, astronomy data, and celestial event monitoring. Ask about launches, missions, asteroids, and the night sky.
AI music generation and production. Create original compositions, generate audio from text descriptions, and explore creative sound design — pay per generation.
STEM research assistant — multi-step reasoning with live tool calls for calculations, data analysis, and scientific queries. Powered by DeepSeek + x402.
One-click polling and voting, gated by x402. Cast your vote, settle in USDC.
x402 is an open protocol for pay-per-call API services. Each request is gated by a 402 Payment Required handshake — the client sends a micro-payment, and the server responds with the result.
Payments settle in USDC or EURC on Base (Ethereum L2). No subscriptions. No recurring billing. No accounts. Just pay for what you use.
But what else could this unlock? x402.review is a companion webzine publishing field notes on speculative applications — AI agents budgeting their own compute, EV charging by the kilowatt-hour, pay-per-reading IoT sensors, and more. Thought experiments, pressure-tested against real protocol economics.