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Text Similarity: Levenshtein & Damerau-Levenshtein Edit Distance
x402
Text Similarity: Levenshtein & Damerau-Levenshtein Edit Distance is a paid API for AI agents from text-similarity.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-21).
Computes Levenshtein and Damerau-Levenshtein (restricted OSA and unrestricted) edit distances between two texts, returning a normalized 0–1 similarity score.
Price / call$0.02
Success—
StatusUnknown
How this service works
Levenshtein and Damerau-Levenshtein edit distance (restricted and unrestricted) between two texts, with a 0 to 1 similarity.
Output
Returns Levenshtein distance, Damerau-Levenshtein OSA (restricted) distance, unrestricted Damerau-Levenshtein distance, a normalized 0-to-1 similarity score, lengths of both input strings, and metadata fields including ignoreCase flag, summary, and any degraded/disclaimer notices.
Example use cases
Typo detection in user input
“I need to check how many character edits separate the user-entered word 'recieve' from the correct spelling 'receive' — can you get the Levenshtein distance and similarity score between those two strings?”
Near-duplicate record deduplication
“We have two company names in our database: 'Acme Corporaton' and 'Acme Corporation' — can you compute the edit distance and normalized similarity between them so I can decide if they're duplicates?”
Password change similarity check
“A user is trying to set a new password 'Sunsh1ne2024!' and their old one was 'Sunshine2024!' — can you get the Levenshtein distance and 0-to-1 similarity between those two strings, case-sensitively?”
Technical details
Endpoint
GEThttps://text-similarity.x402tookit.com/edit-distance?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need character-level edit distance metrics (Levenshtein or Damerau-Levenshtein) between two texts of up to 2000 characters each, especially for typo detection, fuzzy deduplication, or spell-checking workflows. Prefer it over Jaro/Jaro-Winkler endpoints when you need full edit-distance counts rather than just a similarity ratio, or when transposition handling (Damerau) matters. Use the sibling cosine or Dice endpoints instead for longer texts or word-overlap comparisons.
Side effects
- Missing required query parameters 'a' or 'b' returns a validation error
- Input strings exceeding 2000 characters may be rejected or truncated
- Payment not provided or invalid x402 payment header causes 402 Payment Required
- Network timeout if the service is temporarily unavailable
- Unexpected characters or encoding issues may cause malformed responses
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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