Tutorials, videos, articles, blog posts, and interactive learning tools for x402. From first payment to production deployment.
- x402-starter-kit
— Widely-referenced x402 starter kit by Nader Dabit. Full end-to-end example for getting a payment-gated API running quickly. 181★
- x402-ai-starter
- 5-Minute Quickstart for Sellers
— Official Coinbase guide. Accept your first x402 payment in minutes.
- Buyer/Client Setup — Official guide for making automated x402 payments.
- One-Line Integration — Add payment middleware in a single line of code. Official examples repo.
- Base Sepolia Testnet Setup — Get test USDC and start testing without real money.
- Solana x402 Developer Guide — Official Solana guide for getting started with x402 payments.
- LearnAI x402 Course — Interactive AI-guided course covering the x402 payment flow, EIP-3009 gasless transfers, facilitator setup (Coinbase CDP, Cloudflare), middleware integration (Express, Next.js, FastAPI), and AI agent-to-agent payments. Free, no account required.
- Introducing x402 — Coinbase announcement post.
- x402 V2 Specification — Major protocol upgrade overview: standardized headers, CAIP-2 network identifiers, modular SDK architecture, Extensions framework.
- Vercel: Introducing x402-mcp — Open protocol payments for MCP tools using AI SDK and
paidToolprimitives. - Polygon: Agentic Payments Infrastructure — Polygon's dedicated x402 agentic payments page.
- How to Pay for AI Services with USDC in One HTTP Call — Walkthrough of x402 payment flow for AI code analysis.
- x402 Explained: The HTTP Status Code That Took 35 Years to Ship — History and technical breakdown of HTTP 402.
- Code Review API: Pay Per PR, Not Per Seat — Why per-request pricing beats SaaS subscriptions.
- AWS Industries: x402 and Agentic Commerce — AWS deep-dive covering AgentCore + CloudFront + Lambda@Edge as a full x402 stack. With reference implementation.
- Developer DAO: A Payment Standard for the Internet — Comprehensive tutorial using
x402-expressandx402-fetch. - Tangle Network: x402 Production Runway — Multi-part series: x402 in Rust, the facilitator trust problem, decentralized verification.
- HTX Ventures: x402 + ERC-8004 Research Report — Research report exploring x402 (value transfer) and ERC-8004 (trust/identity) as complementary Web3 infrastructure.
- DWF Labs: Inside x402 — Protocol mechanics, ecosystem adoption, real-world use cases.
- WorkOS: x402 vs Stripe MPP — Comprehensive comparison for AI agents and MCP tools.
- Lushbinary: x402 & EmDash Content Monetization — x402 + Cloudflare EmDash as the content monetization stack for the AI era.
- The Agentic Economy — How autonomous agents are reshaping commerce, and where x402 fits in.
- Agentic Economy Timeline — Key milestones from early agent research to production x402 deployments.
- Agentic Payments Are Finally Useful — What x402 means for founders in 2026.
- James Bachini: Why x402 Is An Important Opportunity For Developers — LinkedIn overview.
- Calmops: x402 Protocol Complete Guide 2026 — Programmable payments for AI agents guide.
- x402 Joins the Linux Foundation — PR Newswire, April 2, 2026. Protocol becomes a neutral open standard with 22+ institutional founding members.
- Bankless: x402's Big Week — Recap of the April 2, 2026 Linux Foundation launch and Bankr x402 Cloud.
- x402 Sees 10,000% Growth — Yahoo Finance.
- PYMNTS: Digital Money Has a New Payment Standard — Analysis of x402 as a machine-first payment standard.
- Nevermined + Visa Intelligent Commerce — April 9, 2026. AI agents get delegated credit card spending authority via Visa + x402.
- Polygon Leads Base in x402 Transactions — Polygon overtakes Base in daily x402 transaction count.
- KakaoPay Joins x402 Foundation — First South Korean payment processor in the x402 Foundation.
- CoinDesk: Demand Still Unproven — Honest assessment of x402's trial phase (March 2026). Worth reading.
- From Stripe to x402 — Migrate subscription and one-time payments from Stripe to x402.
- From API Keys to x402 Payments — Replace API key-based access control with payment-per-use.
- From Subscription to Pay-Per-Use — Transform monthly subscriptions into granular pay-as-you-go.
- x402 V2 Migration Guide — Official Coinbase guide from x402 v1 to v2.
- x402 Protocol Specification — Official open-source protocol implementation by Coinbase.
- Coinbase Developer Platform Docs — Complete implementation guide and API reference.
- x402 Whitepaper — Technical deep dive into protocol architecture.
- EIP-3009 TransferWithAuthorization — Gasless transfer standard used by x402.
- HTTP 402 Status Code — The long-dormant HTTP status code, now very much alive.
- awesome-molt-ecosystem — 200+ AI agent platforms with x402 economy analysis. Tracks 9 x402 tools, facilitator comparison, revenue data, platform ratings.
- xpaysh/awesome-x402 — The original community x402 awesome list. Accepts all contributions. gold-402 is the curated layer on top.
- sindresorhus/awesome — The awesome list of awesome lists.
- Awesome Ethereum — Ethereum development resources.