🔗Resources
Your curated toolkit for navigating the x402 protocol, autonomous payments, and the broader crypto ecosystem. No fluff—just the good stuff.
❄️ Yuki402 Resources
Official Links
🌐 Platform
yuki402.xyz - Main application
Launch app, connect wallet, start paying autonomously
📖 Documentation
You're here! Complete guides and references
Quick Start Guide - 5-minute setup
Installation - Local development
Configuration - Advanced setup
💬 Community
X/Twitter: @yuki402xyz
Updates, announcements, alpha drops
Follow for latest features and security updates
🔗 Code
GitHub: github.com/yuki402-xyz/yuki402
Smart contracts, frontend, full stack
MIT License - fork, modify, deploy
🆘 Support
Email: [email protected]
Response time: <24 hours
Technical support and bug reports
🌐 x402 Protocol
The open standard powering autonomous payments.
🏠 Homepage
Protocol overview and vision
Service registry and explorer
📚 Technical Documentation
Implementation guide for developers
HTTP 402 payment flow specifications
Smart contract templates
💻 Open Source
Protocol implementations
Reference smart contracts
Integration examples
🔍 Service Registry
Browse x402-compatible services
Check service status and pricing
Verify service authenticity
⛓️ Blockchain Infrastructure
RPC Providers (Critical for Production)
Helius (Solana) - Recommended
Website: helius.dev
Best for: Production Solana apps
Why: 99.9% uptime, fastest RPC, generous free tier
Features: Analytics, webhooks, priority fees
Pricing: Free tier → $50/month for serious usage
QuickNode (Multi-Chain)
Website: quicknode.com
Best for: Multi-chain projects
Chains: Solana, Ethereum, Polygon, Base, 15+ more
Why: Global infrastructure, high rate limits
Pricing: $9/month → $300/month enterprise
Alchemy (Ethereum & Solana)
Website: alchemy.com
Best for: Ethereum developers
Why: Excellent docs, webhooks, free tier
Features: Enhanced APIs, transaction simulation
Pricing: Free → $199/month professional
RPCPool (Solana)
Website: rpcpool.com
Best for: Solana-focused projects
Why: Specialized Solana infrastructure
Features: Staked nodes, geo-distribution
Pricing: Custom enterprise plans
Block Explorers
Solscan (Solana)
Website: solscan.io
Track transactions, wallets, tokens
Real-time updates
Program (smart contract) analysis
NFT metadata display
Etherscan (Ethereum)
Website: etherscan.io
The OG blockchain explorer
Contract verification and source code
Gas tracker and analytics
API for developers
PolygonScan (Polygon)
Website: polygonscan.com
Polygon POS and zkEVM
Same interface as Etherscan
Lower fees, faster finality
BaseScan (Base)
Website: basescan.org
Coinbase's L2 network
Growing ecosystem
Familiar Etherscan interface
🔐 Wallet Resources
Browser Wallets
MetaMask
Website: metamask.io
Most popular Web3 wallet
Ethereum, Polygon, Base, BSC support
30M+ users worldwide
Hardware wallet integration (Ledger, Trezor)
Phantom
Website: phantom.app
Best Solana wallet experience
Clean UI, great mobile app
Multi-chain support (Ethereum, Polygon)
Built-in swap and bridge
Coinbase Wallet
Website: wallet.coinbase.com
Easy onboarding from Coinbase exchange
Multi-chain support
dApp browser on mobile
WalletConnect integration
Brave Wallet
Built into Brave browser
No extension needed
Privacy-focused
Multi-chain support
Hardware wallet support
Hardware Wallets (Recommended for Large Amounts)
Ledger
Website: ledger.com
Industry standard for security
Ledger Nano S Plus: $79
Ledger Nano X: $149 (Bluetooth)
Supports 5,500+ coins and tokens
Trezor
Website: trezor.io
Open-source hardware wallet
Trezor One: $69
Trezor Model T: $219 (touchscreen)
No Bluetooth = more secure
Pro tip: Use hardware wallet with MetaMask/Phantom for best security + UX.
🤖 AI & Development Tools
AI Model Providers
OpenRouter
Website: openrouter.ai
Access 100+ AI models through one API
Yuki402 uses this for Gemini 2.0 Flash
Pay-per-use pricing
No monthly minimums
Get API key: openrouter.ai/keys
Google AI Studio
Website: aistudio.google.com
Direct access to Gemini models
Free tier for testing
Faster than OpenRouter (direct connection)
Good for high-volume production
Anthropic (Claude)
Website: anthropic.com
Claude 3.5 Sonnet for advanced reasoning
Higher quality but slower/more expensive
Good for complex payment logic
Requires separate API key
Development Frameworks
Next.js
Website: nextjs.org
React framework powering Yuki402
App Router for server components
API routes for backend logic
Vercel deployment integration
Vercel AI SDK
Website: sdk.vercel.ai
Streaming AI responses
Multi-model support
Tool/function calling
React hooks for chat UIs
Solana Web3.js
Website: solana-labs.github.io/solana-web3.js
Official Solana JavaScript SDK
Transaction building and signing
RPC connection management
Program interaction
ethers.js
Website: docs.ethers.org
Ethereum JavaScript library
Wallet management
Smart contract interaction
Human-readable ABI
📚 Learning Resources
Blockchain Basics
Solana Cookbook
Website: solanacookbook.com
Practical code examples
Common Solana patterns
Client and on-chain guides
Community-maintained
Ethereum.org Developer Docs
Website: ethereum.org/developers
Comprehensive Ethereum guide
Smart contract tutorials
Network architecture
Security best practices
Buildspace
Website: buildspace.so
Free Web3 courses
Project-based learning
Community of builders
Deploy real projects
Alchemy University
Website: university.alchemy.com
Free blockchain courses
Ethereum development
NFTs, DeFi, DAOs
Certification upon completion
Smart Contract Development
Solidity Documentation
Website: docs.soliditylang.org
Official Solidity language docs
Syntax, features, patterns
Security considerations
Examples and tutorials
OpenZeppelin Contracts
Website: docs.openzeppelin.com/contracts
Battle-tested smart contracts
ERC-20, ERC-721 standards
Access control patterns
Security utilities
Hardhat
Website: hardhat.org
Ethereum development environment
Testing framework
Console for debugging
Plugin ecosystem
Foundry
Website: getfoundry.sh
Fast Solidity testing framework
Written in Rust
Gas-efficient tests
Fuzz testing built-in
🔍 Analytics & Monitoring
On-Chain Analytics
Dune Analytics
Website: dune.com
SQL queries on blockchain data
Community dashboards
Custom visualizations
Free tier available
Nansen
Website: nansen.ai
Smart money tracking
Wallet labeling and analysis
Token flow visualization
Premium service ($150/month+)
Bubblemaps
Website: bubblemaps.io
Visualize token holder distributions
Detect whale clusters
Connection analysis
Free for basic use
Gas Trackers
Etherscan Gas Tracker
Website: etherscan.io/gastracker
Real-time Ethereum gas prices
Historical gas data
Best time to transact
Mobile app notifications
Solana Beach
Website: solanabeach.io
Solana network metrics
TPS, block times
Validator performance
Epoch information
🛡️ Security Resources
Security Auditing
OpenZeppelin Audits
Website: openzeppelin.com/security-audits
Industry-leading smart contract audits
Trusted by top protocols
Comprehensive reports
Expensive but worth it for production
Trail of Bits
Website: trailofbits.com
Security engineering firm
Smart contract audits
Security tooling
Incident response
Consensys Diligence
Website: consensys.net/diligence
Ethereum-focused audits
Automated analysis tools
Best practices documentation
Security Tools
Slither
Website: github.com/crytic/slither
Static analysis for Solidity
Detects vulnerabilities automatically
CI/CD integration
Free and open source
MythX
Website: mythx.io
Security analysis platform
API-based scanning
Multiple detection engines
Free tier available
Tenderly
Website: tenderly.co
Transaction simulation
Debugging tools
Alerting and monitoring
Incident response
💰 DeFi Resources
Exchanges (Fiat → Crypto On-Ramps)
Coinbase
Website: coinbase.com
Most beginner-friendly
Bank transfers, credit cards
High fees but easy UX
Strong regulatory compliance
Kraken
Website: kraken.com
Lower fees than Coinbase
Advanced trading features
Good for larger amounts
Strong security track record
Binance
Website: binance.com
Lowest fees
Massive liquidity
Global availability (check your region)
Most altcoins available
Crypto.com
Website: crypto.com
Good mobile app
Visa debit card
Staking rewards
Lower fees with CRO holdings
DEXs (Decentralized Exchanges)
Uniswap (Ethereum)
Website: uniswap.org
Largest Ethereum DEX
Deepest liquidity
Permissionless token listing
AMM model
Raydium (Solana)
Website: raydium.io
Leading Solana DEX
Order book + AMM hybrid
Fast, cheap trades
Yield farming
Jupiter (Solana)
Website: jup.ag
Solana DEX aggregator
Best prices across all Solana DEXs
Limit orders
Dollar-cost averaging
PancakeSwap (BSC)
Website: pancakeswap.finance
Binance Smart Chain DEX
Low fees
High APY farms
NFT marketplace
🎓 Advanced Topics
MEV & Transaction Optimization
Flashbots
Website: flashbots.net
MEV research organization
Protect transactions from frontrunning
Ethereum MEV infrastructure
Jito (Solana MEV)
Website: jito.wtf
Solana MEV solution
Priority fees optimization
Validator tips for inclusion
Layer 2 Solutions
Arbitrum
Website: arbitrum.io
Ethereum L2 rollup
Lower fees than mainnet
Same security as Ethereum
Growing DeFi ecosystem
Optimism
Website: optimism.io
Ethereum L2 rollup
Retro public goods funding
OP Stack for app chains
Superchain vision
Base (Coinbase L2)
Website: base.org
Built on OP Stack
Coinbase backing
Easy fiat on-ramps
Mainstream adoption focus
🧰 Developer Utilities
API Testing
Postman
Website: postman.com
API development platform
Test x402 endpoints
Collection sharing
Automation tools
Insomnia
Website: insomnia.rest
Lightweight API client
GraphQL support
Environment variables
Open source
Code Editors
VS Code
Website: code.visualstudio.com
Most popular editor
Solidity extensions
Remote development
Integrated terminal
Cursor
Website: cursor.sh
AI-powered VS Code fork
Code generation
Intelligent completions
Great for Web3 development
Web3 Libraries
wagmi
Website: wagmi.sh
React hooks for Ethereum
TypeScript-first
Wallet connection
Contract interaction
@solana/wallet-adapter
React components for Solana wallets
Support for all major wallets
TypeScript support
UI library included
📰 News & Media
Industry News
The Block
Website: theblock.co
Data-driven crypto journalism
Research reports
Market analysis
Daily newsletter
CoinDesk
Website: coindesk.com
OG crypto news site
Consensus conference organizer
Market data
Opinion pieces
Decrypt
Website: decrypt.co
Consumer-focused crypto news
Accessible explanations
Web3 culture coverage
Daily newsletter
Bankless
Website: bankless.com
DeFi-focused content
Podcast and newsletter
Educational deep dives
Community-driven
Twitter/X Accounts to Follow
@solana
Official Solana account
Network updates
Ecosystem highlights
@ethereum
Official Ethereum account
Protocol development
Ecosystem news
@VitalikButerin
Ethereum co-founder
Long-form thoughts
Protocol philosophy
@aeyakovenko
Solana co-founder
Technical insights
Network performance
@0xMert_
On-chain analysis
MEV research
Technical breakdowns
🎯 Best Practices Resources
Security Checklists
Smart Contract Security Best Practices
Comprehensive security guide
Common vulnerabilities
Testing strategies
Audit preparation
Not So Smart Contracts
Examples of bad contracts
Learn from mistakes
Vulnerability patterns
Prevention techniques
Web3 UX Guidelines
Rainbow Design System
Website: rainbow.me/design
Mobile-first Web3 design
Wallet interaction patterns
Transaction UX
WalletConnect Design
Website: walletconnect.com
Connection flow best practices
Multi-wallet support
QR code patterns
🆘 Getting Help
Developer Communities
Solana Stack Exchange
Website: solana.stackexchange.com
Q&A for Solana developers
Active community
Tagged questions
Ethereum Stack Exchange
Website: ethereum.stackexchange.com
Ethereum development Q&A
Smart contract help
Large knowledge base
BuildSpace Discord
Active community of builders
Project feedback
Networking opportunities
Solana Tech Discord
Official Solana developer community
#dev-support channel
Core team presence
💡 Contributing to This List
Found a great resource? Help the community:
📧 Email: [email protected] 🐦 Tweet: @yuki402xyz 🔀 PR: github.com/yuki402-xyz/yuki402
Include:
Resource name and URL
Brief description (1-2 sentences)
Why it's useful
Any costs/pricing
⚠️ Disclaimer
External resources are provided for educational and informational purposes only. Yuki402 does not endorse, guarantee, or assume responsibility for third-party services. Always:
✅ Do your own research (DYOR) ✅ Verify smart contract addresses ✅ Check service reputation ✅ Start with small amounts ✅ Read terms and conditions
Stay safe out there. The crypto space moves fast—verify everything, trust cautiously, and never share your seed phrase.
Ready to dive deeper? Check out the Glossary for terminology or the FAQ for common questions.
Start building? Head to yuki402.xyz and experience autonomous payments firsthand.
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