Web3 & Crypto
Blockchain, cryptocurrency, Web3 development
x402-payments
by Aznatkoiny
Build applications using the x402 protocol — Coinbase's open standard for HTTP-native stablecoin payments using the HTTP 402 status code. Use this skill when: - Creating APIs that require USDC payments per request (seller/server side) - Building clients or AI agents that pay for x402-protected resources (buyer/client side) - Implementing MCP servers with paid tools for Claude Desktop - Adding payment middleware to Express, Hono, or Next.js applications - Working with Base (EVM) or Solana (SVM) payment flows - Building machine-to-machine or agent-to-agent payment systems - Integrating micropayments, pay-per-use billing, or paid API access Triggers: x402, HTTP 402, payment required, USDC payments, micropayments, pay-per-use API, agentic payments, stablecoin payments, paid API endpoint, paywall middleware
blockchain-expert
by personamanagmentlayer
Expert-level blockchain, Web3, smart contracts, DeFi, and cryptocurrency development
multiversx-flash-loan-patterns
by multiversx
Atomic lend-execute-verify pattern for MultiversX smart contracts. Use when building flash loans, atomic swaps, temporary grants, or any operation that lends assets, executes a callback, and verifies repayment within a single transaction.
multiversx-crypto-verification
by multiversx
Cryptographic operations in MultiversX smart contracts. Use when hashing data (SHA256, Keccak256, RIPEMD160), verifying signatures (Ed25519, secp256k1, secp256r1, BLS), or encoding signatures in on-chain logic.
multiversx-spec-compliance
by multiversx
Verify smart contract implementations match their specifications, whitepapers, and MIP standards. Use when auditing for specification adherence, validating tokenomics implementations, or checking MIP compliance.
multiversx-payment-handling
by multiversx
Handle payments in MultiversX smart contracts. Use when receiving, validating, or routing EGLD/ESDT payments via self.call_value(), Payment types, or payable endpoints. Covers single, multi, optional, and mixed payment patterns.
mvx_sdk_js_contracts
by multiversx
Smart contract operations for MultiversX TypeScript/JavaScript SDK.
multiversx-blockchain-data
by multiversx
Read on-chain state in MultiversX smart contracts. Use when accessing caller info, account balances, block timestamps, ESDT token metadata, local roles, code metadata, or any data from self.blockchain().
multiversx-dapp-audit
by multiversx
Audit frontend dApp components for security vulnerabilities in wallet integration and transaction handling. Use when reviewing React/TypeScript dApps using sdk-dapp, or assessing client-side security.
mvx_sdk_js_wallets
by multiversx
Wallet and key management for MultiversX TypeScript/JavaScript SDK.
multiversx-protocol-experts
by multiversx
Deep protocol knowledge for MultiversX architecture including sharding, consensus, ESDT standards, and cross-shard transactions. Use when reviewing protocol-level code, designing complex dApp architectures, or troubleshooting cross-shard issues.
mvx_sdk_py_contracts
by multiversx
Smart contract operations for MultiversX Python SDK.
multiversx-smart-contracts
by multiversx
Build MultiversX smart contracts with Rust. Use when app needs blockchain logic, token creation, NFT minting, staking, crowdfunding, or any on-chain functionality requiring custom smart contracts.
multiversx-constant-time
by multiversx
Verify cryptographic operations execute in constant time to prevent timing attacks. Use when auditing custom crypto implementations, secret comparisons, or security-sensitive algorithms in smart contracts.
mvx_sdk_go_core
by multiversx
Core network operations for MultiversX Go SDK - Proxy, VM Queries.
multiversx-dapp-frontend
by multiversx
Adapt React applications to MultiversX blockchain with wallet connection, transactions, and smart contract interactions. Use when app needs Web3, blockchain, wallet login, crypto payments, NFTs, tokens, or smart contract calls.
multiversx-cache-patterns
by multiversx
Gas-optimized cache patterns for MultiversX smart contracts using Drop-based write-back caches. Use when building contracts that read/write multiple storage values per transaction, DeFi protocols, or any gas-sensitive contract.
mvx_sdk_js_tokens
by multiversx
Token operations (ESDT/NFT/SFT) for MultiversX TypeScript/JavaScript SDK.
mvx_sdk_go_interactors
by multiversx
Components for interacting with the blockchain (Wallets, Transaction Interactors, Nonce Handlers) in Go.
mvx_flash_loan_patterns
by multiversx
Atomic lend-execute-verify pattern — reentrancy guards, shard validation, endpoint checks.
web3-polymarket
by Polymarket
Polymarket integration for prediction market trading on Polygon. Covers authentication (L1 EIP-712, L2 HMAC-SHA256, builder headers), order placement (GTC/GTD/FOK/FAK, batch, post-only, heartbeat), market data (Gamma API, Data API, orderbook, subgraph), WebSocket streaming (market/user/sports channels), CTF operations (split, merge, redeem, negative risk), bridge (deposits, withdrawals, multi-chain), and gasless relayer transactions. Use when building AI agents, autonomous market makers, prediction market UIs, or any application integrating with Polymarket on Polygon.
trading-strategist
by kukapay
Provides trading strategies for cryptocurrencies based on Binance market data, calculated technical analysis indicators, and aggregated market sentiment from crypto RSS news feeds. Use when users ask for trading advice, strategy recommendations, or analysis combining price data, TA, and sentiment for crypto assets like ETH, BTC, or altcoins.
token-minter
by kukapay
Generate, build, and deploy custom ERC20 tokens on EVM networks. Use when users want to create and deploy their own ERC20 tokens with custom parameters like name, symbol, decimals, and initial supply. Supports deployment to various networks including Sepolia testnet and requires Foundry (forge/cast) for blockchain interactions.
aibtc-bitcoin-wallet
by aibtcdev
Bitcoin L1 wallet for agents - check balances, send BTC, manage UTXOs. Extends to Stacks L2 (STX, DeFi) and Pillar smart wallets (sBTC yield).