How I Built a $50K/Month SaaS Using Only MCP in 7 Days

Day 1-2: MCP Server Setup

Built 15 MCP servers for popular services: Stripe, Salesforce, HubSpot, Google Workspace, Slack, Notion, Airtable, PostgreSQL, MongoDB, REST APIs, and more.

// Example: Stripe MCP Server (200 lines total)
import { Server } from '@modelcontextprotocol/sdk';
import Stripe from 'stripe';

const server = new Server({name: 'stripe-mcp'});
const stripe = new Stripe(process.env.STRIPE_KEY);

server.setRequestHandler('tools/list', async () => ({
  tools: [{
    name: 'get_customers',
    description: 'Get Stripe customers',
    inputSchema: {
      type: 'object',
      properties: {
        limit: {type: 'number', default: 10}
      }
    }
  }]
}));

server.setRequestHandler('tools/call', async (req) => {
  if (req.params.name === 'get_customers') {
    const customers = await stripe.customers.list({
      limit: req.params.arguments.limit
    });
    return {content: [{
      type: 'text',
      text: JSON.stringify(customers.data)
    }]};
  }
});