{"uid":"cap_xcHpPGURakXOF_Pf4TSaD","slug":"original-metaphone-phonetic-key-05afd941","name":"Original Metaphone Phonetic Key","description":"Original Metaphone (Philips 1990, not Double) phonetic key of an English word, with optional second word to compare.","url":"https://text-similarity.x402tookit.com/metaphone?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["word"],"properties":{"word":{"type":"string","description":"An English word or name, up to 200 characters (letters only are used)"},"other":{"type":"string","description":"Optional second word to compare keys"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"key":{"type":["null","string"]},"asOf":{"type":["null","string"]},"word":{"type":["null","string"]},"other":{"type":["null","string"]},"source":{"type":["null","string"]},"reasons":{"type":["array","null"],"items":{"type":"string"}},"sameKey":{"type":["boolean","null"]},"summary":{"type":["null","string"]},"variant":{"type":["null","string"]},"verdict":{"type":["null","string"]},"degraded":{"type":["boolean","null"]},"otherKey":{"type":["null","string"]},"disclaimer":{"type":["null","string"]},"notChecked":{"type":["array","null"],"items":{"type":"string"}}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_UqzGDMYr_QFX6zd3n4VLN","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes the Original Metaphone (Philips 1990) phonetic key for an English word, and optionally compares two words to determine if they share the same key.","exampleAgentPrompt":"What's the Original Metaphone key for the word 'knight', and does it match the key for 'night'?","exampleUseCases":[{"title":"Name deduplication in a customer database","prompt":"I have two customer records — one spelled 'Thompson' and one spelled 'Thomson' — can you check if they share the same Original Metaphone key so I can decide whether they're likely the same person?"},{"title":"Phonetic spelling validation for a form","prompt":"Get the Original Metaphone phonetic key for the name 'Catherine' so I can group it with other spelling variants that sound the same."},{"title":"Fuzzy name search in a genealogy app","prompt":"Do 'Caughey' and 'Kahee' produce the same Metaphone key? I'm trying to match historical records where names were spelled phonetically by census takers."}],"resultDescription":"Returns the Original Metaphone key for the input word, and if a second word is provided, also returns its Metaphone key, a boolean indicating whether both keys match, a summary, a verdict, and reasons explaining the comparison result. May also include source, variant, degraded flag, disclaimer, and any unchecked aspects.","failureModes":["Word contains non-letter characters — only letters are used, non-letter characters are stripped or ignored","Word exceeds 200 characters — input is truncated or rejected","Empty or missing 'word' parameter — returns an error since it is required","Word is not an English word — Metaphone may produce unexpected or empty keys for non-English vocabulary","Unrecognized edge cases in Philips 1990 algorithm — result may differ from implementations of Double Metaphone"],"whenToPreferThis":"Choose this endpoint when you specifically need the Original Metaphone algorithm (Philips 1990) rather than Double Metaphone or Soundex. It is ideal for phonetic deduplication of English names and words, fuzzy name matching, and detecting spelling variants that sound the same. Prefer this over Soundex when you need a more nuanced phonetic encoding, and over Levenshtein when pronunciation similarity matters more than character-level edit distance.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T12:37:53.854Z","isFirstParty":false,"canonicalSlug":"original-metaphone-phonetic-key-05afd941"}