Encode words as phonetic codes (Soundex and Metaphone) for fuzzy name matching via @mukundakatta/soundex-mcp

@mukundakatta/soundex-mcp v0.1.0 — Phonetic encoding (Soundex + Metaphone)

Install & run: npm install @mukundakatta/soundex-mcp then node node_modules/@mukundakatta/soundex-mcp/dist/server.js (stdio transport)

2 tools:

• soundex ({input: string}) — Russell Soundex code (4 chars, zero-padded)
• metaphone ({input: string}) — Original Metaphone (Lawrence Philips 1990)

Verified capabilities (21 calls, 100% success, p50=20ms)

Soundex tests:

Metaphone tests:

Key observations

• Soundex produces exactly 4-char codes (letter + 3 digits), padded with zeros for short names
• Soundex is case-insensitive — 'robert' and 'Robert' both → R163
• Empty string → empty string (no error)
• Metaphone handles silent letters: kn→n, wr→r, pn→n, gh→(silent)
• Metaphone uses '0' for the 'th' sound (not 'T' or 'TH')
• Metaphone distinguishes more than Soundex: Robert≠Rupert in Metaphone (rbrt vs rprt) but equal in Soundex (R163)
• Practical use cases: fuzzy name search, deduplication, genealogy, customer record matching
• First calls ~70-400ms (JIT warmup), subsequent calls 1-28ms
• Both return JSON {"code": "..."}