Image Generator MCP

AI image generation with DALL-E 3 and x402 micropayments on Base.

Features

• 🎨 AI Image Generation - Generate high-quality images from text prompts using OpenAI DALL-E 3

• 💳 x402 Payments - Pay $0.010 USDC per image via Base mainnet

• 📐 Multiple Sizes - 1024x1024, 1024x1792 (portrait), 1792x1024 (landscape)

• ⚡ Fast Generation - Images generated in seconds

• 🔒 Payment Verification - Secure payment verification via Coinbase CDP Facilitator

Related MCP server: mazzagrp-mcp

Live Demo

🌐 Service URL: https://image-generator-mcp.vercel.app

API Endpoints

POST /api/generate

Generate AI image from text prompt

Request:

{
  "prompt": "A serene mountain landscape at sunset",
  "size": "1024x1024",
  "quality": "standard"
}

Parameters:

• prompt (required) - Text description of the image

• size (optional) - Image dimensions: 1024x1024, 1024x1792, 1792x1024 (default: 1024x1024)

• quality (optional) - Image quality: standard, hd (default: standard)

Response:

{
  "success": true,
  "prompt": "A serene mountain landscape at sunset",
  "revisedPrompt": "A tranquil mountain scene...",
  "imageUrl": "https://oaidalleapiprodscus.blob.core.windows.net/...",
  "size": "1024x1024",
  "quality": "standard",
  "generatedAt": "2026-09-06T10:45:00.000Z",
  "payment": {
    "verified": true,
    "amount": "0.010",
    "currency": "USDC"
  }
}

GET /.well-known/x402

x402 Bazaar discovery endpoint (free)

GET /mcp/tools

MCP tool metadata (free)

GET /health

Health check endpoint (free)

Payment Details

• Network: Base Mainnet (eip155:8453)

• Currency: USDC

• Price: $0.010 per image

• Protocol: x402 v2 "exact" scheme

• Payment Address: 0xf081ee84c0d85278a6242bc265f0b312021ebeb1

Setup

Prerequisites

• Node.js 18+

• OpenAI API key

• Vercel account (for deployment)

Installation

npm install

Environment Variables

Create a .env file:

OPENAI_API_KEY=your_openai_api_key_here
X402_FACILITATOR_URL=https://api.cdp.coinbase.com/platform/v2/x402
PORT=3000

Local Development

npm start

Server runs on http://localhost:3000

Deployment

Deploy to Vercel

# Install Vercel CLI
npm i -g vercel

# Deploy
vercel

# Set environment variable
vercel env add OPENAI_API_KEY

Add your OpenAI API key when prompted.

How x402 Payment Works

1. Agent calls /api/generate without payment

2. Server returns 402 with payment details in PAYMENT-REQUIRED header

3. Agent pays $0.010 USDC on Base via CDP Facilitator

4. Agent retries with PAYMENT-SIGNATURE header

5. Server verifies payment and generates image

Tech Stack

• Express.js - Web server

• @x402/core - Payment verification

• OpenAI API - DALL-E 3 image generation

• Base Mainnet - Low-fee L2 blockchain

• Vercel - Serverless deployment

License

MIT

Support

For issues or questions, open an issue on GitHub.