String similarity: Levenshtein, Jaro-Winkler distance and Soundex/Metaphone phonetic keys
Pay-per-call endpoint from duoleads. Price per call: $0.050 (USDC, x402).
Proof
endpoint (shown as text, not a link, to avoid accidental calls):
https://api.duoleads.com/v1/text/similarity“HTTP 402 + x402 v2 challenge: amount 50000 atomic units of USD Coin (= $0.05)”
Details
- Price per call
- $0.050 (USDC, x402)
- Provider
- duoleads
- Protocol
- x402 · USDC (Base)
- Method
- GET
- Price basis
- USDC amount in the unpaid HTTP 402 payment challenge (first accepted option)
- Last probed
- 2026-10-17
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