How to Build an AI Employee Using MCP and Claude

What if your AI assistant could actually DO things — not just talk about them?

With MCP (Model Context Protocol) and 0nMCP, you can build an AI employee that:

• Responds to customer messages automatically


• Scores leads and updates your CRM


• Creates invoices and sends them


• Posts to social media on schedule


• Generates reports from your data

Here's how.

The Architecture

You (or a trigger) → Claude/AI → 0nMCP → APIs → Results

1. A trigger fires (new message, schedule, webhook)


2. Claude receives the context


3. 0nMCP executes the required API calls


4. Results flow back

Example 1: Auto-Responder

When a customer sends a message to your CRM:

1. Webhook fires → hits your endpoint


2. Claude reads the message + contact history


3. Claude generates a personalized response


4. 0nMCP sends the response via CRM API

All automatic. Response time: under 10 seconds.

Example 2: Lead Scorer

When a new contact is created:

1. CRM webhook fires


2. Claude analyzes: email domain, title, company, source


3. Assigns a score 0-100


4. 0nMCP updates the contact with the score and tags

High-score leads get tagged "hot" and assigned to sales immediately.

Example 3: Content Creator

On a daily schedule:

1. Cron triggers the workflow


2. Claude generates a LinkedIn post based on your voice profile


3. 0nMCP posts it via the social media API


4. Done — fresh content every day without lifting a finger

Setting It Up

Step 1: Install 0nMCP

npm install -g 0nmcp

Step 2: Connect Your Services

Add credentials for the services your AI employee needs:

• CRM for contacts and conversations


• Stripe for invoicing


• Slack for notifications


• SendGrid for emails

Step 3: Create a Workflow

Save this as auto-responder.0n:

{

  "$0n": {

    "type": "workflow",

    "version": "1.0.0",

    "name": "Auto Responder"

  },

  "trigger": {

    "type": "webhook",

    "config": { "path": "/hooks/auto-respond" }

  },

  "steps": [

    {

      "id": "step_001",

      "service": "anthropic",

      "action": "chat_completion",

      "params": { "model": "claude-sonnet-4-20250514", "messages": [{"role": "user", "content": "Generate a reply to: {{inputs.message}}"}] },

      "output": "reply"

    },

    {

      "id": "step_002",

      "service": "crm",

      "action": "send_message",

      "params": { "contactId": "{{inputs.contactId}}", "type": "Email", "message": "{{step_001.output.response}}" }

    }

  ]

}

Step 4: Run It

0nmcp run auto-responder.0n

Your AI employee is now live.

The Cost

0nMCP is free and open source. The only cost is the AI API calls (Claude/OpenAI) — typically $0.01-0.05 per execution.

For a business running 100 automated actions per day, that's about $3/month.

Get Started

• GitHub: github.com/0nork/0nMCP
  


• npm: npmjs.com/package/0nmcp
  


• Website: 0nmcp.com
  

npm install -g 0nmcp — your first AI employee starts today.