# Node4All

> The simplest way to integrate the x402 protocol for payment-ready AI agents. Node4All provides documentation, testing tools, code examples, and ready-to-use services.

## Services

- [Explore Available Services](https://node4all.com/services): Browse the full Node4All service catalog and rollout status.
- [x402 Base validation & testing](https://sandbox.node4all.com): Validate AI agents against the Base Sepolia x402 v2 sandbox before moving to mainnet.
- Markdown to PDF (md2pdf): `POST /v1/md2pdf` on sandbox + mainnet — multipart or JSON, returns application/pdf. x402 v2 paid.
- PDF to Markdown (pdf2md): `POST /v1/pdf2md` on sandbox + mainnet — layout-aware extraction optimized for LLM context windows. x402 v2 paid.

## Blog

- [Markdown-to-PDF API on Sandbox and Main Endpoints](https://node4all.com/blog/markdown-to-pdf-endpoints): Convert Markdown to PDF over a single x402 v2 endpoint on Base, available on both Sandbox (Base Sepolia) and Production (Base mainnet).
- [Testing x402 Sandbox Endpoints (Base Testnet)](https://node4all.com/blog/x402-sandbox-endpoints): Use our sandbox endpoints and Postman collection to validate x402 flows on Base Sepolia. Full step-by-step walkthrough coming soon.
- [Understanding x402 Fundamentals](https://node4all.com/blog/x402-fundamentals): A deep dive into how x402 handles verifiable payments and gating for stateless APIs and agents without requiring traditional user accounts.

## API Documentation

- [Sandbox API Docs](https://sandbox.node4all.com/docs): OpenAPI/Swagger documentation for sandbox x402 endpoints.

## Links

- [Privacy Policy](https://node4all.com/privacy)
- [Terms of Service](https://node4all.com/terms)
- [Contact](mailto:hello@node4all.com)