x402 Inspector Pro — Challenge Decoder

Paste and locally decode x402 payment challenge headers or JSON, then generate a safe cURL request template.

x402 Inspector Pro is the ultimate developer utility for inspecting, decoding, and simulating HTTP 402 Payment Required challenges in modern agentic commerce workflows. Built specifically for developers building and integrating payment-gated APIs (x402), this extension gives you clear visibility into agent micro-settlement challenges right inside your browser. KEY FEATURES: • Visual Header Inspection: Instantly intercept and decode x402 HTTP headers to see prices, target token assets, chain IDs, and payment facilitator endpoints in human-readable cards. • Signature Challenge Simulator: Test local signature generation and payment challenge responses without spending real crypto assets during development. • 1-Click Code Export: Copy inspected x402 requests instantly into formatted cURL commands or fetch blocks to drop straight into your terminal, Cloudflare Workers, or Hono backends. • Pro Agentic Gateway: Streamline machine-to-machine payment verification and debug payment-gated API endpoints in real time. Fast, lightweight, and built for developer productivity on EVM, Base, and testnet environments.