ToolVet
78trust / 100

Text Similarity

by Kakerapetit in Documents & files

x402 APIPassing, checked 2 h ago

Compute similarity between two texts. Returns Jaccard, Dice, cosine and overlap scores for two strings. Use to deduplicate documents, match names or titles, and detect near-identical text.

POST
https://api.kakerapetit.dev/v1/text/similarity
Price
$0.002
per call in USDC
Uptime
100%
last 30 days
Response time
759 ms
993 ms slowest 5%
Last check
Passed
2 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed

How to call it

POST https://api.kakerapetit.dev/v1/text/similarity

Each call costs $0.002 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://api.kakerapetit.dev/v1/text/similarity
content-type: application/json

{
  "text_a": "The quick brown fox jumps over the lazy dog",
  "text_b": "A quick brown fox jumped over a lazy dog"
}

Parameters

ParameterTypeRequiredDescription
text_astringYesFirst text to compare.
text_bstringYesSecond text to compare.

Example response

The provider's example. We can't check it without paying.

{
  "cosine_tf": 0.667,
  "dice": 0.667,
  "jaccard": 0.5,
  "overlap": 0.667
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.002.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.kakerapetit.dev/v1/text/similarity' \
  -H 'content-type: application/json' \
  --data-raw '{"text_a":"The quick brown fox jumps over the lazy dog","text_b":"A quick brown fox jumped over a lazy dog"}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://api.kakerapetit.dev/v1/text/similarity' \
  -H 'content-type: application/json' \
  --data-raw '{"text_a":"The quick brown fox jumps over the lazy dog","text_b":"A quick brown fox jumped over a lazy dog"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.002" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.kakerapetit.dev%2Fv1%2Ftext%2Fsimilarity&method=POST
const res = await pay("https://api.kakerapetit.dev/v1/text/similarity", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "text_a": "The quick brown fox jumps over the lazy dog",
    "text_b": "A quick brown fox jumped over a lazy dog"
  }),
});
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.002"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://api.kakerapetit.dev/v1/text/similarity",
        json={
            "text_a": "The quick brown fox jumps over the lazy dog",
            "text_b": "A quick brown fox jumped over a lazy dog",
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

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2 h agoPassed402900 ms$0.002
6 h agoPassed402713 ms$0.002
10 h agoPassed402612 ms$0.002
14 h agoPassed402621 ms$0.002
19 h agoPassed402824 ms$0.002
Show 10 older checks
23 h agoPassed4021.1 s$0.002
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