Text Similarity

Last 30 days

Uptime

100%

Response time

140 ms typical, 557 ms slowest 5%

Last check

3 h ago

Next check

any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X GET "https://api.duoleads.com/v1/text/similarity?a=kitten&b=sitting"

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.duoleads.com%2Fv1%2Ftext%2Fsimilarity
const res = await pay("https://api.duoleads.com/v1/text/similarity?a=kitten&b=sitting");
console.log(await res.json());

Example input

{
  "a": "kitten",
  "b": "sitting"
}

Example output

{
  "data": {
    "damerau_levenshtein": 3,
    "dice": 0.36363636363636365,
    "equal_after_fold": false,
    "folded": {
      "a": "kitten",
      "b": "sitting"
    },
    "jaro": 0.746031746031746,
    "jaro_winkler": 0.746031746031746,
    "lcs_length": 4,
    "levenshtein": 3,
    "normalised_similarity": 0.5714285714285714,
    "phonetic": {
      "a": {
        "metaphone": "KTN",
        "nysiis": "CATAN",
        "soundex": "K350"
      },
      "b": {
        "metaphone": "STNK",
        "nysiis": "SATANG",
        "soundex": "S352"
      }
    }
  },
  "meta": {
    "computed_at": "2026-09-28T12:00:00.000Z",
    "deterministic": true,
    "disclaimer": "Factual output of a deterministic computation over public data. Provided as is, with no warranty of accuracy, completeness or availability. Not investment, financial, legal, tax, medical or any other professional advice, and not a recommendation. Verify before relying on it. Terms: https://api.duoleads.com/terms",
    "price_usd": "0.05",
    "request_id": "01K6B7Q4ZC8H3F2M9WXR5TYN0D"
  },
  "ok": true,
  "route": "/v1/text/similarity",
  "version": "1.0.0"
}

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