MilliGate (x402 Crypto Paywall) MCP Server已验证已精选

MilliGate is a sovereign Model Context Protocol (MCP) server designed for autonomous AI agents. It implements a fully decentralized, machine-to-machine (M2M) micro-payment architecture using the HTTP 402 Payment Required standard.

By eliminating traditional API keys and SaaS subscriptions, MilliGate allows any AI agent to access premium compute and data resources seamlessly, settling micro-transactions instantly on the Base L2 network using USDC.

🚀 Core Architecture

MilliGate operates on a deterministic "discover freely, pay to execute" model:

• Open Discovery (/sse): Agents can connect, open an SSE tunnel, and read the server's manifest and available tools without friction or authentication (None/Open).
• Cryptographic Tollgate (/message): When an agent attempts to execute a premium tool, the server triggers an HTTP 402 response.
• On-Chain Settlement: The agent must remit payment (e.g., 0.05 USDC) to a specific smart contract on Base L2 and present the transaction hash in the X-Payment-Proof header to unlock the execution.

🛠 Technical Stack & Features

• Protocol: MilliGate implements the official remote Model Context Protocol specification over Streamable HTTP, utilizing Server-Sent Events (SSE) for server-to-client streaming and secure HTTP POST endpoints for JSON-RPC message dispatch.
• Network: Base L2 (Chain ID: 8453) for fast, low-cost micro-transactions.
• Currency: USDC (Native micro-settlements).
• Infrastructure: Built with Node.js, Express, and secured via Cloudflare Tunnels for edge-optimized delivery.
• Middleware Security: Strict session validation and real-time blockchain receipt verification (via Ethers.js) before tool execution.

🤖 Why it matters for AI Agents

The current M2M ecosystem is bottlenecked by human-centric authentication (OAuth, credit cards, static API keys). MilliGate introduces a truly sovereign economic layer. Agents hold their own wallets, negotiate access dynamically, and pay exclusively for what they consume, exactly when they consume it.

Welcome to the future of the autonomous machine economy.