The simplest way to integrate the x402 protocol.
Node4All provides everything you need to build payment-ready agents. Explore our step-by-step documentation, testing tools, code examples, and ready-to-use services built for x402.
Ecosystem Services
x402 Base validation & testing
Validate your AI agents against our Base Sepolia x402 sandbox. Exercises 402 Payment Required challenges, payment-signature verification, and destination checks end-to-end without real USDC.
Markdown to PDF
Synchronous Markdown → PDF for agents that need shareable document artifacts. Accepts JSON or multipart uploads (.md, up to 10MB) and streams a PDF back directly. x402 v2 paid endpoint on Base (sandbox + mainnet).
x402 Postman collection
Download the ready-to-import collection for all current sandbox endpoints (Base Sepolia, Solana Devnet, and md2pdf). WIP and expanding, but fully downloadable now.
PDF to Markdown
Layout-aware PDF → Markdown conversion so AI agents can ingest 100+ page documents efficiently. Returns structured, low-token Markdown optimized for context windows. x402 v2 paid endpoint on Base (sandbox + mainnet).
Latest Stories
Markdown-to-PDF API on Sandbox and Main Endpoints
Convert Markdown to PDF over a single x402 v2 endpoint on Base, available on both Sandbox (Base Sepolia) and Production (Base mainnet).
2026-04-06Testing x402 Sandbox Endpoints (Base Testnet)
Use our sandbox endpoints and Postman collection to validate x402 flows on Base Sepolia. Full step-by-step walkthrough coming soon.
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We are constantly integrating new models and tools directly into the node4all gateway to make them accessible to programmatic agents. Reach out to discuss integrations or API capabilities.
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