# Services from similarity.openverbs.com on Zero

> similarity.openverbs.com serves 10 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/similarity.openverbs.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/similarity.openverbs.com/health.json

## Services

- [Jaro / Jaro-Winkler String Similarity](https://www.zero.xyz/c/jaro-jaro-winkler-string-similarity-1e3ce1a3/llms.txt): $0.004/call via x402. Computes Jaro similarity and the Jaro-Winkler variant (with configurable prefix boost) between two strings, returning scores in [0,1].
- [Phonetic Similarity Compare (similarity.openverbs.com)](https://www.zero.xyz/c/phonetic-similarity-compare-similarity-openverbs-com-e306e7f7/llms.txt): $0.002/call via x402. Checks whether two tokens sound alike using Soundex, Metaphone, or Double Metaphone, returning each token's phonetic codes and a boolean match result.
- [Hamming Distance Calculator](https://www.zero.xyz/c/hamming-distance-calculator-e780d504/llms.txt): $0.004/call via x402. Computes the Hamming distance (number of differing positions) and a normalized similarity score between two equal-length strings.
- [Damerau-Levenshtein Distance & Similarity](https://www.zero.xyz/c/damerau-levenshtein-distance-similarity-ef0b9460/llms.txt): $0.004/call via x402. Computes the Damerau-Levenshtein edit distance between two strings (counting insertions, deletions, substitutions, and adjacent transpositions) plus a normalized similarity score in [0,1].
- [Metaphone Phonetic Encoder](https://www.zero.xyz/c/metaphone-phonetic-encoder-275ddd83/llms.txt): $0.002/call via x402. Encodes a single English word using the Metaphone algorithm to produce a phonetic key for pronunciation-based matching.
- [Jaccard Similarity (Character Bigrams)](https://www.zero.xyz/c/jaccard-similarity-character-bigrams-492e8b06/llms.txt): $0.004/call via x402. Computes the Jaccard similarity index between two strings based on the overlap of their character-bigram sets, returning a score between 0 and 1.
- [Sørensen-Dice Bigram Similarity](https://www.zero.xyz/c/s-rensen-dice-bigram-similarity-c3f909f6/llms.txt): $0.004/call via x402. Computes the Sørensen-Dice similarity coefficient (0–1) between two strings using character bigrams, robust to word-order variation and minor edits.
- [Soundex Phonetic Encoder](https://www.zero.xyz/c/soundex-phonetic-encoder-effdcb9a/llms.txt): $0.002/call via x402. Encodes a word using the classic Soundex algorithm, returning a letter + 3-digit code for phonetic name matching.
- [Levenshtein Edit Distance & Normalized Similarity](https://www.zero.xyz/c/levenshtein-edit-distance-normalized-similarity-5d0147ee/llms.txt): $0.004/call via x402. Computes the Levenshtein edit distance (insertions, deletions, substitutions) between two strings and returns a normalized similarity score in [0,1], operating on Unicode code points.
- [Double Metaphone Encoder](https://www.zero.xyz/c/double-metaphone-encoder-6af5d9d3/llms.txt): $0.002/call via x402. Encodes a word using the Double Metaphone algorithm, returning both a primary and secondary phonetic code to capture alternate pronunciations, especially for non-English names.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)