yellowX

Demo

About

## What is yellowX? **yellowX** is an x402 API marketplace for AI agents that pay for API access autonomously — built from the ground up for **Yellow Network**. It's the first x402 implementation designed specifically to leverage Yellow Network's state channels, enabling agents to make instant, gasless payments for API services.

How it's made

# yellowX — x402 Payments on Yellow Network **Autonomous agent payments with instant settlement, zero gas fees, powered by Yellow Network state channels** [](https://yellow.org/) [](https://www.x402.org/) --- ## What is yellowX? **yellowX** is an x402 API marketplace for AI agents that pay for API access autonomously — built from the ground up for **Yellow Network**. It's the first x402 implementation designed specifically to leverage Yellow Network's state channels, enabling agents to make instant, gasless payments for API services. ### How It Works ``` Agent receives task ↓ API returns 402 Payment Required ↓ Agent pays via Yellow Network (instant, gasless) ↓ Service executes ↓ Atomic settlement (payment only if service succeeds) ``` ### Who Is This For? - **AI Agent Builders** — Enable your agents to pay for APIs autonomously - **API Providers** — Monetize your APIs with instant USDC payments - **Developers** — Explore agentic commerce and x402 micropayments --- ## Why Yellow Network? yellowX is built for **Yellow Network** because traditional payment rails are too slow and expensive for autonomous agents. ### Yellow Network Strengths for yellowX #### ⚡ Instant Payments Sub-second settlement via state channels. No waiting for block confirmations. Agents execute tasks and pay instantly. **Yellow Network:** <100ms payment latency **Traditional on-chain:** 1-2s payment latency **Result:** 5-10x faster #### 💸 Zero Gas Fees Off-chain payments eliminate gas costs entirely. Agents pay exactly what the API costs — nothing more. **Yellow Network:** $0.000 gas per transaction **Traditional on-chain:** ~$0.001 gas per transaction **Result:** 9% cost savings per transaction #### 🔄 State Channels Scalable off-chain payment channels suitable for high-frequency micropayments. Perfect for agents making dozens or hundreds of API calls. #### 🌐 x402-Native HTTP 402 "Payment Required" + Yellow Network payment flow. Agents detect 402 responses, authorize payments via Yellow, and retry — all automatically. #### 💵 USDC Stable, programmable payments. No volatility, no surprises. ### How yellowX Uses Yellow Network 1. **402 responses include Yellow Network session info** — Agents know how to pay instantly 2. **Yellow Network is the default** — Agents prefer Yellow when available 3. **Off-chain verification** — Payments verified via `X-Yellow-Payment` header 4. **Automatic fallback** — On-chain payments when Yellow is unavailable ### Benefits for Agents - **~5-10x faster** than on-chain payments - **~9% cost savings** per transaction (no gas) - **Better UX** for multi-step agent workflows - **Scalable** to thousands of API calls per minute