{"uid":"cap_9xz67drwzZ3IAYIPQmds7","slug":"american-soundex-phonetic-hash-api-ae27eab5","name":"American Soundex Phonetic Hash API","description":"Compute the American Soundex (NARA) phonetic hash code for one or more words. Soundex maps similar-sounding names to the same 4-character code (letter + 3 digits). Useful for fuzzy name matching. Deterministic, pure CPU.","url":"https://agent402.tools/api/soundex","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"text":{"type":"string","description":"one or more words to hash (space-separated)"}}},"responseSchema":{"type":"json","example":{"codes":[{"word":"Robert","soundex":"R163"},{"word":"Rupert","soundex":"R163"}],"match":true}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_TbHO_5jGjWUpkHf511yVi","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes the American Soundex (NARA) phonetic hash code for one or more words, mapping similar-sounding names to the same 4-character code for fuzzy name matching.","exampleAgentPrompt":"What's the American Soundex code for the names 'Smith', 'Smyth', and 'Smithe' — I want to check if they all map to the same phonetic hash?","exampleUseCases":null,"resultDescription":"A Soundex phonetic hash code (one letter followed by three digits, e.g. S530) for each word provided. Deterministic output — same input always produces the same 4-character code, enabling fuzzy matching of similarly-sounding names.","failureModes":["Empty or missing 'text' field returns an error","Non-alphabetic input (numbers, symbols) may produce unexpected or invalid Soundex codes","Payment failure via x402 protocol returns 402 status","Very long input strings may be truncated or rejected"],"whenToPreferThis":"Use this endpoint when you need deterministic, standards-compliant American Soundex (NARA) phonetic hashing for name deduplication, genealogical record matching, or fuzzy name search. Prefer this over custom phonetic algorithms when NARA-standard Soundex compatibility is required and you need a simple, fast, pure-CPU computation without ML overhead.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T19:14:03.630Z","isFirstParty":false}