What is the key difference between Numbers and Creditcard?

Numbers belongs to the Developer Tools category with local stdio execution, while Creditcard belongs to the Developer Tools category with local stdio execution.

How do I install Numbers or Creditcard 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 Numbers and Creditcard free or paid?

Numbers operates under a Free / Open Source model (No auth required). Creditcard operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Numbers lists 4 tools with 0 views and 0 GitHub stars. Creditcard lists 2 tools with 0 views and 0 GitHub stars.

Can I use both Numbers and Creditcard 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

Numbers vs Creditcard

In-depth architectural comparison of the Numbers and Creditcard 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

Numbers

Developer Tools · Local stdio

Quality: 40/100 (Fair) | Auth: No auth required

Creditcard

Developer Tools · Local stdio

Quality: 41/100 (Fair) | Auth: No auth required

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

Which MCP Server Should You Choose?

Choose Numbers when:

You need dedicated capabilities in the Developer Tools domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: convert_base, to_roman, from_roman.

Explore Numbers Details

Choose Creditcard when:

You need dedicated capabilities in the Developer Tools domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: validate_card, check_luhn.

Explore Creditcard Details

Feature & Specification Comparison

Specification	N Numbers Developer Tools	C Creditcard Developer Tools
Summary	Number utilities MCP.	Credit-card number validation MCP.
Category & Scope	Developer Tools	Developer Tools
Quality signal

Tools & Capabilities Breakdown

Numbers Tools (4)

convert_base

Convert an integer between numeral bases 2-36 (keyless, offline). E.g. number "ff" from_base 16 to_base 2 -> "11111111".

to_roman

Convert an integer (1-3999) to Roman numerals.

from_roman

Convert a Roman numeral to an integer (rejects malformed numerals).

number_to_words

Spell an integer in English words, e.g. 1234 -> "one thousand two hundred thirty-four".

Creditcard Tools (2)

validate_card

Validate a credit/debit card number (keyless, offline): Luhn (mod-10) checksum, detected card network (Visa/Mastercard/Amex/Discover/JCB/Diners/UnionPay/Maestro), and whether the length is valid for that network. Spaces/dashes are ignored. NOTE: this checks the number is well-formed — it does NOT v…

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).

Numbers Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "numbers": {
      "command": "npx",
      "args": [
        "-y",
        "numbers"
      ]
    }
  }
}

Creditcard Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "creditcard": {
      "command": "npx",
      "args": [
        "-y",
        "creditcard"
      ]
    }
  }
}

Frequently Asked Questions

Numbers is categorized under Developer Tools and uses a local stdio subprocess. In contrast, Creditcard belongs to Developer Tools using local stdio subprocess. Select Numbers when you need capabilities focused on developer tools and Creditcard when you require tools for developer tools.

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