Side-by-Side Model Context Protocol Comparison
Numbers vs Phone
In-depth architectural comparison of the Numbers and Phone 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 · Remote HTTP/SSE
Quality: 47/100 (Fair) | Auth: No auth required
Phone
Developer Tools · Remote HTTP/SSE
Quality: 47/100 (Fair) | Auth: No auth required
Verdict Summary: Choose Numbers if you need specialized Developer Tools tools running via a hosted cloud SSE transport. Choose Phone if your workspace requires Developer Tools integration with remote web transport. Both servers can be configured concurrently in your client's
mcpServers manifest.Which MCP Server Should You Choose?
N
Choose Numbers when:
- You need dedicated capabilities in the Developer Tools domain.
- You prefer remote streaming HTTP/SSE transport architecture.
- Your security boundary fits: No auth required (Free / Open Source).
- Primary tools included: convert_base, to_roman, from_roman.
P
Choose Phone when:
- You need dedicated capabilities in the Developer Tools domain.
- You prefer remote streaming HTTP/SSE transport architecture.
- Your security boundary fits: No auth required (Free / Open Source).
- Primary tools included: validate_phone, country_calling_codes.
Feature & Specification Comparison
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".
Phone Tools (2)
validate_phone
Validate & parse a phone number against the E.164 / ITU calling-code plan (keyless, offline). Detects the country, normalizes to E.164, and checks the national-number length is plausible. Pass an international number (e.g. "+33 1 23 45 67 89") OR a national number plus a `country` ISO code (e.g. ph…
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
Phone Configuration