"Open Access" matching MCP connectors:

Open agent work plus an independent provenance-resolver handoff; earn tag-scoped standing.

x402 V2 payment-to-access on Solana USDC with receipts, entitlements, atomic metering and webhooks.

Hyperliquid perp market data for LLMs: OHLCV, funding, open interest, positioning & forecasts.

Buy any of 24,000+ live x402 services with USDC on Base — the open marketplace for the agent economy.

Order-book depth & history for Polymarket, Kalshi & Limitless. Keyless demo, key for full access.

Monetize your MCP server or CLI: live OpenCrater network stats + how maintainers earn USDC.

The OpenZeppelin Stylus Contracts MCP server generates secure smart contracts for the Arbitrum Stylus environment using OpenZeppelin templates, including ERC-20, ERC-721, and ERC-1155 standards. It automatically validates generated code against OpenZeppelin's security and style rules, enforcing best practices for imports, modifiers, naming conventions, and security checks to prevent common vulnerabilities. The server integrates with AI development tools like Cursor, Claude, Gemini, Windsurf, and VS Code to enable AI-assisted, production-ready smart contract development.

The OpenZeppelin Solidity Contracts MCP server integrates OpenZeppelin's security and style rules into AI-driven development workflows, enabling AI assistants to generate safe, correct, and production-ready smart contracts. It automatically validates generated code against OpenZeppelin standards (including imports, modifiers, naming conventions, and security checks) and supports various contract types including ERC-20, ERC-721, ERC-1155, Stablecoins, RWA, Governor, and Account contracts through prompt-driven workflows.

The OpenZeppelin Stellar Contracts MCP server generates secure smart contracts for the Stellar blockchain based on OpenZeppelin templates. It integrates with AI assistants to automatically enforce OpenZeppelin's security best practices, style rules, and standards at every prompt, enabling developers to create production-ready Fungible Token, Non-Fungible Token, and Stablecoin contracts through AI-driven workflows.

The OpenZeppelin Cairo Contracts MCP server generates secure smart contracts in the Cairo language for Starknet environments based on OpenZeppelin templates. It brings OpenZeppelin's proven security and style rules directly into AI-driven development workflows to create safe, production-ready contracts. Key capabilities include providing templates for ERC-20, ERC-721, ERC-1155, Multisig, Governor, and Vesting contracts.

Gate DEX MCP for wallet auth, transfers, swaps, token info, market data, and RPC access.

Production MCP server giving AI agents metered access to live Hedera blockchain data. Query token prices, screen identities, monitor governance, write tamper-evident HCS compliance records, and analyze smart contracts — all paid in HBAR micropayments per call.

Provide AI agents and automation tools with contextual access to blockchain data including balance…

Non-custodial execution primitives for DeFi on Solana. 1 bps to open. Everything else is free.

Query real-time blockchain token data across EVM and Solana networks. Access token balances, transfers, prices, holders, NFT ownership, DEX swaps, and liquidity pools. Supports Ethereum, Base, Arbitrum, BSC, Polygon, Solana, and more.

MCP server giving AI agents one-connection access to crypto & DeFi data: DeFi protocol TVL, stableco

Open API Marketplace for AI Agents. Crypto data tools with USDC payments on Base.

Classify Polymarket wallets as human or bot, score their trading edge, read open positions.

MCP server for Mudrex futures trading enabling AI agents to securely access data and risk tools.

MCP server that gives Claude, ChatGPT, and any MCP-compatible AI agent access to pay-per-call crypto/DeFi data via the x402 protocol.