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Phonetic Similarity Compare (similarity.openverbs.com)
x402
Phonetic Similarity Compare (similarity.openverbs.com) 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).
Checks whether two tokens sound alike using Soundex, Metaphone, or Double Metaphone, returning each token's phonetic codes and a boolean match result.
Price / call$0.002
Success—
StatusUnknown
How this service works
Report whether two tokens sound alike under a chosen algorithm (soundex, metaphone or double-metaphone; default double-metaphone). Returns each token's codes and a boolean match.
Output
Returns each token's phonetic encoding(s) under the chosen algorithm (primary and secondary codes for double-metaphone, single code for soundex/metaphone) and a boolean indicating whether the two tokens are considered phonetically equivalent.
Example use cases
Deduplicating customer name records
“I have two customer records — one spelled 'Jonson' and one 'Johnson' — can you check if they sound the same using double-metaphone so I can decide whether to merge them?”
Catching misspelled product names
“Does 'Fizer' sound like 'Pfizer' under phonetic matching? Compare them with the metaphone algorithm and tell me if they're a match.”
Validating user-entered names against database
“A user typed 'Schneider' but we have 'Snyder' in our database — use soundex to check if those two names are phonetically the same.”
Technical details
Endpoint
POSThttps://similarity.openverbs.com/v1/compareWhen to prefer
Use this endpoint when you need a single yes/no phonetic match decision with supporting codes for two tokens, especially when you want to choose between soundex, metaphone, or double-metaphone algorithms. Prefer this over edit-distance endpoints (Levenshtein, Jaro-Winkler) when the concern is pronunciation rather than spelling, and over the individual encoding endpoints when you need both tokens encoded and compared in a single call.
Side effects
- Missing required field 'a' or 'b' returns a validation error
- Empty string for either token rejected (minLength: 1)
- String exceeding 256 characters rejected (maxLength: 256)
- Invalid algorithm value (not one of soundex, metaphone, double-metaphone) causes error
- Payment failure via x402 protocol results in 402 response and no computation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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