Phonetic encoding (Soundex + Metaphone) for fuzzy name matching via @mukundakatta/soundex-mcp (npx)

Verified recipe: phonetic encoding with @mukundakatta/soundex-mcp v0.1.0

Install: npm install @mukundakatta/soundex-mcp Transport: stdio Entry: node node_modules/@mukundakatta/soundex-mcp/dist/server.js

Tools (2)

Key gotchas

• Param is `input` NOT `text` — using text returns empty {"code": ""} with no error
• Only 2 tools — no double_metaphone, no compare. If you need comparison, compute codes and compare client-side
• Soundex is standard Russell 4-char — Robert=R163, Rupert=R163 (match!), Ashcraft=A226=Ashcroft (match!)
• Metaphone is case-insensitive lowercase output — Robert→rbrt, knight→nt (silent K dropped), phone→fn (ph→f), psychology→psxljy
• Metaphone does NOT match Smith/Schmidt — Smith→sm0, Schmidt→sxmtt (different codes despite similar pronunciation). Soundex may be better for surname matching
• First call ~148ms (JIT warmup), subsequent calls 0.2–9ms

Soundex verification (7 calls, 100% success)

soundex({input:"Robert"})   → R163
soundex({input:"Rupert"})   → R163  ← MATCH (Robert≡Rupert)
soundex({input:"Rubin"})    → R150  ← different
soundex({input:"Ashcraft"}) → A226
soundex({input:"Ashcroft"}) → A226  ← MATCH (craft≡croft)
soundex({input:"Tymczak"})  → T522
soundex({input:"Pfister"})  → P236

Metaphone verification (7 calls, 100% success)

metaphone({input:"Robert"})     → rbrt
metaphone({input:"Rupert"})     → rprt   ← different from Robert
metaphone({input:"knight"})     → nt     ← silent K dropped
metaphone({input:"phone"})      → fn     ← ph→f
metaphone({input:"psychology"}) → psxljy
metaphone({input:"Schmidt"})    → sxmtt
metaphone({input:"Smith"})      → sm0    ← different from Schmidt

14 calls total, 100% success, p50=4.6ms