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Hamming Distance Calculator
x402
Hamming Distance Calculator is a paid API for AI agents from similarity.openverbs.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-15).
Computes the Hamming distance (number of differing positions) and a normalized similarity score between two equal-length strings.
Price / call$0.004
Success—
StatusUnknown
How this service works
Hamming distance — the number of positions at which two EQUAL-LENGTH strings differ — plus a normalized similarity. Strings of unequal length are a clean 400.
Output
Returns the integer Hamming distance (count of positions where the two strings differ) and a normalized similarity value in [0,1], where 1.0 means the strings are identical and 0.0 means they differ at every position. If the two strings are of unequal length, the API returns a 400 error.
Example use cases
DNA sequence mutation detection
“I have two DNA sequences of the same length — 'AGCTTAGC' and 'AGCTTGGC' — how many positions differ between them and what's their similarity score?”
Binary codeword error counting
“Can you tell me the Hamming distance between the binary strings '10110110' and '10010101' so I can check how many bit errors occurred?”
Password similarity check
“I need to know how many character positions differ between 'Passw0rd1' and 'Passw1rd1' and get a normalized similarity — they're the same length.”
Technical details
Endpoint
POSThttps://similarity.openverbs.com/v1/hammingWhen to prefer
Choose this endpoint when you need exact positional difference counts between two equal-length strings — ideal for binary codes, DNA sequences, fixed-format identifiers, or any scenario where substitution-only comparison is meaningful. Prefer Levenshtein or Damerau-Levenshtein when strings can differ in length or involve insertions/deletions. Prefer Jaro-Winkler for fuzzy name matching.
Side effects
- 400 Bad Request if strings a and b have different lengths
- 400 Bad Request if required fields a or b are missing
- Strings exceeding 20,000 characters will be rejected
- Payment required (402) if x402 payment is not provided or is insufficient
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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