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Soundex Phonetic Encoder
x402
Soundex Phonetic Encoder is a paid API for AI agents from similarity.openverbs.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Encodes a word using the classic Soundex algorithm, returning a letter + 3-digit code for phonetic name matching.
Price / call$0.002
Success—
StatusUnknown
How this service works
Encode a word with the classic Soundex algorithm (letter + 3 digits) for phonetic matching of names.
Output
Returns a Soundex code consisting of one letter followed by three digits (e.g. 'S530') that represents the phonetic signature of the input word, enabling fuzzy matching of names that sound alike despite spelling differences.
Example use cases
Deduplicating customer name records
“I have two customer entries — 'Johnson' and 'Jonson' — can you get the Soundex codes for both so I can check if they're phonetically the same and should be merged?”
Phonetic search index for surnames
“I'm building a search feature and need to index the surname 'Wojciechowski' by its Soundex code so users can find it even if they spell it wrong — can you encode it?”
Genealogy name variant lookup
“I'm researching family history and want to find records that sound like 'Kowalski' — can you give me the Soundex code so I can search for phonetic variants?”
Technical details
Endpoint
POSThttps://similarity.openverbs.com/v1/soundexWhen to prefer
Choose this endpoint when you need the classic, widely-supported Soundex algorithm specifically — for legacy system compatibility, genealogy databases, or simple English name deduplication. Prefer Metaphone or Double Metaphone siblings on this service for more accurate English pronunciation encoding; prefer the 'sounds alike' endpoint when you only need a boolean phonetic match rather than the raw code.
Side effects
- Empty or missing 'word' field returns a 400 validation error
- Words exceeding 256 characters are rejected
- Non-alphabetic input (numbers, symbols only) may return an unexpected or default code
- Payment failure (402) if x402 credentials are missing or insufficient
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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