x402.study

Accept your first payment.

Make automated payments.

Add payment middleware in a single line of code.

Get test USDC and start testing.

Go live on Base mainnet.

Official open-source protocol implementation by Coinbase.

Protocol foundation website with overview and documentation.

Technical deep dive into protocol architecture.

Complete implementation guide and API reference.

Detailed technical specifications.

Ethereum Virtual Machine specifics.

Official LangChain integration. Implements 'Treasurer' pattern to separate payment logic.

Agent commerce protocol by Google.

Enable Claude Desktop to spend crypto autonomously via Model Context Protocol.

Multi-modal agents framework with native x402 support.

Cross-chain agent settlements and intent execution.

Spending Policy Engine for Agents (Innovation).

Leading payment processor with 10.5M+ cumulative transactions.

Major exchange integrating x402 for seamless payment flows.

Official CDP implementation processing massive volume.

Edge computing platform with x402 integration across 300+ data centers.

The Premier Cloud Infrastructure. Deploy a Facilitator in seconds (FaaS).

Edge computing facilitator on Base/Ethereum with deferred settlement.

BNB Chain facilitator with instant settlement.

Production-grade self-hosted Rust facilitator.

Shopping agent. Buy physical goods (Amazon) with USDC via gasless signatures.

Cloud browser automation API that charges per-session using x402. No subscriptions.

Simple paid API endpoint.

Premium content access tutorial.

Social app integration.

React + Hono + Session management.

Python/TS SDK specialized for EIP-3009 gasless payment flows.

Complete TypeScript implementation.

Python SDK on PyPI.

Production-grade Rust implementation.

Got HTTP client integration.

TypeScript library used for signing payments.

Alternative Ethereum library.

High-performance Ethereum library for Rust.

Decentralized facilitator with 'Triple-Verified' stack.

Express.js middleware example.

Axum web framework integration.

Reqwest HTTP client wrapper.

Next.js App Router middleware.

Reference Node.js implementation for 'Pay-to-Pin' IPFS services.

Python FastAPI implementation.

Autonomous agent that monetizes endpoints and burns revenue tokens.

SIWE authentication with conditional pricing.

Decentralized credit scoring.

1,500+ Web3 APIs via x402 MCP servers.

Web scraping with x402 payments.

Protocol announcement.

Technical explanation.

Future of agent payments.

Hands-on workshop.

20-minute tutorial.

Future of autonomous payments.

TechCrunch coverage.

Ars Technica feature story.

Complete specification.

Official security audit of smart contracts.

Comprehensive audits of USDC.

Production deployment security requirements.

Rewards up to $50,000 for vulnerabilities.

Official community server.

Active developer chat.

Official updates.

Community forum and discussions.

Farcaster channel.