Posted on Mar 24 • Originally published at 0nmcp.com

I Built an MCP Server with 945 Tools — Here's What I Learned

#mcp #automation #opensource #ai

Every AI tool I use — Claude, Cursor, Windsurf — they all speak the same protocol now: MCP (Model Context Protocol).

But here's the problem: connecting each service requires writing a separate MCP server. Stripe needs one. Slack needs one. Your CRM needs one. That's dozens of servers to maintain.

So I built 0nMCP — one universal MCP server that connects to 54 services with 945 tools.

What is 0nMCP?

It's an npm package. Install it, configure your API keys, and suddenly your AI can:

Send emails via SendGrid
Create Stripe customers and invoices
Post to Slack, Discord, and 50 other services
Manage CRM contacts, pipelines, and appointments
Query databases (Supabase, MongoDB, Airtable)
Generate content with OpenAI and Anthropic
Manage GitHub repos, issues, and PRs
Schedule meetings via Calendly and Google Calendar

All through natural language.

npm install -g 0nmcp

How It Works

Add it to your Claude Desktop config:

{
  "mcpServers": {
    "0nMCP": {
      "command": "npx",
      "args": ["-y", "0nmcp"]
    }
  }
}

That's it. Claude now has access to 945 tools.

Say: "Create a Stripe customer for john@example.com, send them a welcome email via SendGrid, and notify #sales on Slack"

0nMCP handles 3 API calls in 2 seconds. Zero code.

The 54 Services

Communication: Slack, Discord, Twilio, SendGrid, Gmail, Microsoft Teams
CRM & Sales: HubSpot, Pipedrive, custom CRM (245 tools alone)
Payments: Stripe, Square, QuickBooks, Plaid
AI: OpenAI, Anthropic
Developer: GitHub, Linear, Jira, Vercel, Cloudflare
Data: Supabase, MongoDB, Airtable, Notion, Google Sheets
Social: LinkedIn, Twitter/X, Instagram, Reddit, TikTok
Marketing: Mailchimp, SendGrid, SmartLead
Advertising: Google Ads, Facebook Ads, LinkedIn Ads, TikTok Ads
E-Commerce: Shopify
Scheduling: Calendly, Zoom, Google Calendar
...and more.

What Makes It Different

1. Natural Language Execution
You don't write API calls. You describe what you want. The AI orchestrator plans and executes.

2. Encrypted Vault
All API keys stored with AES-256-GCM encryption. Your credentials never leave your machine unencrypted.

3. Workflow Runtime
Chain multiple tools into .0n workflow files. Run them on schedule, via webhook, or manually.

4. Works Everywhere
Claude Desktop, Cursor, Windsurf, Gemini, Continue, Cline, OpenAI — any MCP client.

The Numbers

What	Count
Total Tools	945
Services	54
Categories	22
CRM Tools	294
Vault Encryption	AES-256-GCM
License	MIT
Price	Free

Getting Started

# Install globally
npm install -g 0nmcp

# Or run directly
npx 0nmcp

# Start HTTP server mode
0nmcp serve --port 3000

Configure your services in ~/.0n/connections/:

{
  "$0n": { "type": "connection", "name": "stripe" },
  "service": "stripe",
  "auth": { "credentials": { "apiKey": "sk_live_..." } }
}

Open Source

MIT licensed. Free forever. Built by RocketOpp LLC — an 0n Company.

GitHub: github.com/0nork/0nMCP
npm: npmjs.com/package/0nmcp
Website: 0nmcp.com

If you're building with MCP, try it: npx 0nmcp

Would love feedback from the community. What services should we add next?

DEV Community