TUTORIAL: (1 of 5) GM builders — Let your APIs earn while you build. Plug FastAPI or Express into X402 and turn every request into on-chain revenue—no invoices, no middlemen, just automated payments around the clock. Website - Docs -

(2 of 5) Python gang — Next, install the packages: pip install openlibx402-core openlibx402-fastapi fastapi Then copy the `.env` file, add your wallet address and USDC mint details, and run: python Open Swagger at `your-biz-domain/docs` to see free and premium routes — premium calls will return 402 payment required errors until your USDC payment clears.

(3 of 5) Express maxis — npm install @openlibx402/client @openlibx402/core @openlibx402/express @solana/web3.js dotenv express Then, build and start the project: npm run build && npm start This sets up flexible price endpoints, on-chain verification, and a market-ready user experience.

(4 of 5) LangChain autopays — Python stack needs `openlibx402-core openlibx402-client openlibx402-langchain langchain langchain-openai openai python-dotenv solders solana`; JS stack wants `@openlibx402/langchain @langchain/core @langchain/openai @langchain/langgraph @solana/web3.js dotenv langchain`. Fund the generated wallets, watch agents rip through 402s with safety caps off-course.

(5 of 5) Impact — Meter AI inference and tiered premium drops — let agents settle payments instantly. No subscriptions, no ads—just seamless pay-per-call infrastructure. “Bots paying bots” is the future of business. Deploy your setup, fam, and demonstrate the timeline for how degen commerce should really feel.

(*) End of the thread. Accelerate.