MilliGate (x402 Crypto Paywall)

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milligate.ioDeveloper Tools0Updated 3w ago

About MilliGate (x402 Crypto Paywall)

MilliGate is a remote MCP server that gates tool execution and data access behind USDC micro-payments on Base L2. It is aimed at developers monetizing agent-facing services, with payment verification handled on-chain.

Key features

01HTTP 402 payment gate
02USDC settlement on Base L2
03On-chain payment receipt validation
04SSE connection and JSON-RPC tools
05Public metadata manifest

Use cases

01Charging AI agents for API access
02Monetizing remote tool execution

MCP support

It exposes a remote MCP server over SSE, with JSON-RPC commands received at `/message`. Clients must provide proof of an on-chain payment to open access.

#mcp #paywall #monetization #base #base-l2 #ai-agents #m2m #web3 #crypto #usdc #sse #middleware #milligate

Configuration

Remote servers need no local install. Pick your client, then copy the config or install in one click.

Endpointhttps://mcp.milligate.io/sse

Copy install command

Claude CodeTerminalclaude mcp add --transport sse milligate-x402-crypto-paywall https://mcp.milligate.io/sse

Cursor.cursor/mcp.json{"mcpServers":{"milligate-x402-crypto-paywall":{"type":"sse","url":"https://mcp.milligate.io/sse"}}}Open in Cursor

VS Code.vscode/mcp.json{"servers":{"milligate-x402-crypto-paywall":{"type":"sse","url":"https://mcp.milligate.io/sse"}}}Open in VS Code

Claude Desktopclaude_desktop_config.json{"mcpServers":{"milligate-x402-crypto-paywall":{"type":"sse","url":"https://mcp.milligate.io/sse"}}}

Windsurf~/.codeium/windsurf/mcp_config.json{"mcpServers":{"milligate-x402-crypto-paywall":{"serverUrl":"https://mcp.milligate.io/sse"}}}

Run commands in a terminal; paste JSON into the client’s MCP config and restart. Servers that need sign-in will prompt on first connect.

Tools

Parameter	Type	Required	Description
task	string	Yes	The task payload to execute.

Details

From the project README

MilliGate Sovereign MCP Server

MilliGate is a Model Context Protocol (MCP) infrastructure and tooling server built specifically for autonomous agents (M2M - Machine-to-Machine). It operates under the sovereign HTTP 402 micro-settlement standard, requiring on-chain micro-payments to unlock data flows and tool execution.

Architecture and Economic Flow

MilliGate eliminates middlemen and centralized APIs by decentralizing access to compute resources and data directly via Base L2:

Discovery: Agents discover the server and its available tools through the public metadata manifest (/.well-known/glama.json).
Blocked Access (HTTP 402): When attempting to connect to the SSE endpoint (/sse), the server responds instantly with a 402 Payment Required status, providing the invoice, fee amount, and treasury wallet address.
On-Chain Settlement: The agent executes an USDC transfer on Base L2.
Validation and Connection: The agent retries the request including the transaction hash in the X-Payment-Proof header. The middleware validates the receipt directly on-chain via the Base RPC and establishes the bidirectional channel.

Core Endpoints

Method	Endpoint	Description
`GET`	`/sse`	Server-Sent Events stream (Protected by HTTP 402 Tollgate)
`POST`	`/message`	JSON-RPC command receiver for tool execution
`GET`	`/.well-known/glama.json`	Public metadata manifest for indexers and directories

🚀 How to Connect (Remote Server)

MilliGate operates as a remote MCP server. You do not need to install it locally to connect your AI agents. Point your MCP client to:

SSE Endpoint: https://mcp.milligate.io/sse

🤖 AI Agent Payment Instructions (MilliGate 402 Tollgate)

This MCP server is protected by a Web3 HTTP 402 Tollgate. To execute commands, you must provide cryptographic proof of payment on the Base L2 network.

Transaction Parameters:

Network: Base L2 (Chain ID: 8453)
Currency: USDC (Official Token: 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913)
Price: 0.05 USDC (50000 in raw integer, as USDC uses 6 decimals)
Tollgate Contract: 0x1AE373b13577768ee43c81BEe5AD264104D67Cc4

Execution Steps:

Call approve(0x1AE373b13577768ee43c81BEe5AD264104D67Cc4, 50000) on the USDC contract.
Call payAndOpen() on the Tollgate Contract.
Send the API request with header: X-Payment-Proof: <TX_HASH>

🛠 Setup and Self-Hosting (For Developers)

If you want to run and customize your own instance of the MilliGate middleware:

Prerequisites

Node.js (v18+)
PM2 (for production process management)
Reverse tunnel (Cloudflare Tunnel recommended)

1. Clone and Install Dependencies

git clone [https://github.com/milligate-admin/milligate-mcp.git](https://github.com/milligate-admin/milligate-mcp.git)
cd milligate-mcp
npm install

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