Side-by-Side Model Context Protocol Comparison
Creditcard vs Numbers
In-depth architectural comparison of the Creditcard and Numbers 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
Creditcard
Developer Tools · Local stdio
Quality: 41/100 (Fair) | Auth: No auth required
Numbers
Developer Tools · Local stdio
Quality: 40/100 (Fair) | Auth: No auth required
Verdict Summary: Choose Creditcard if you need specialized Developer Tools tools running via a local process. Choose Numbers 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?
C
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.
N
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.
Feature & Specification Comparison
Tools & Capabilities Breakdown
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…
check_luhn
Run a raw Luhn (mod-10) check-digit validation on any numeric string (cards, IMEI, national IDs, etc.). Returns whether the check digit is valid and what the correct check digit would be.
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.
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).
Creditcard Configuration
Numbers Configuration