What is the key difference between Nostr MCP and Calcom MCP?

Nostr MCP belongs to the Communication category with local stdio execution, while Calcom MCP belongs to the Communication category with local stdio execution.

How do I install Nostr MCP or Calcom MCP in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are Nostr MCP and Calcom MCP free or paid?

Nostr MCP operates under a Free / Open Source model (other). Calcom MCP operates under a BYOK (Pay Provider Direct) model (API Key required).

Which MCP server has more tools and community activity?

Nostr MCP lists 2 tools with 4 views and 38 GitHub stars. Calcom MCP lists 6 tools with 3 views and 19 GitHub stars.

Can I use both Nostr MCP and Calcom MCP together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

Side-by-Side Model Context Protocol Comparison

Nostr MCP vs Calcom MCP

In-depth architectural comparison of the Nostr MCP and Calcom MCP MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

At a Glance & Executive Verdict

Nostr MCP

Communication · Local stdio

Quality: 56/100 (Good) | Auth: other

Calcom MCP

Communication · Local stdio

Quality: 35/100 (Fair) | Auth: API Key required

Verdict Summary: Choose Nostr MCP if you need specialized Communication tools running via a local process. Choose Calcom MCP if your workspace requires Communication integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Nostr MCP when:

You need dedicated capabilities in the Communication domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: other (Free / Open Source).
You have access to required keys: NOSTR_RELAYS, NOSTR_NSEC_KEY, SERVER_MODE, PORT, LOG_LEVEL, NODE_ENV.
Primary tools included: post_note, send_zap.

Explore Nostr MCP Details

Choose Calcom MCP when:

You need dedicated capabilities in the Communication domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: API Key required (BYOK (Pay Provider Direct)).
You have access to required keys: CALCOM_API_KEY.
Primary tools included: Cal.com API v2 access, Event type and booking management, Booking creation with attendee details.

Feature & Specification Comparison

Specification	Nostr MCP AbdelStark Communication	Calcom MCP Danielpeter-99 Communication
Summary	A Nostr MCP server that allows to interact with Nostr, enabling posting notes, and more.	MCP server for Calcom. Manage event types, create bookings, and access Cal.com scheduling data through LLMs.
Category & Scope	Communication

Tools & Capabilities Breakdown

Nostr MCP Tools (2)

post_note

Posts a new note to the Nostr network.

send_zap

Sends a Lightning zap to a Nostr user.

Calcom MCP Tools (6)

Cal.com API v2 access

Event type and booking management

Booking creation with attendee details

Schedule, team, and user listing

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

Nostr MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "abdelstark-nostr-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@smithery/cli"
      ],
      "env": {
        "NOSTR_RELAYS": "YOUR_NOSTR_RELAYS_HERE",
        "NOSTR_NSEC_KEY": "YOUR_NOSTR_NSEC_KEY_HERE",
        "SERVER_MODE": "YOUR_SERVER_MODE_HERE",
        "PORT": "YOUR_PORT_HERE",
        "LOG_LEVEL": "YOUR_LOG_LEVEL_HERE",
        "NODE_ENV": "YOUR_NODE_ENV_HERE"
      }
    }
  }
}

Calcom MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "danielpeter-99-calcom-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "danielpeter-99-calcom-mcp"
      ],
      "env": {
        "CALCOM_API_KEY": "YOUR_CALCOM_API_KEY_HERE"
      }
    }
  }
}

Frequently Asked Questions

Nostr MCP is categorized under Communication and uses a local stdio subprocess. In contrast, Calcom MCP belongs to Communication using local stdio subprocess. Select Nostr MCP when you need capabilities focused on communication and Calcom MCP when you require tools for communication.

More alternatives to Nostr MCP More alternatives to Calcom MCP Communication category hub