ToolVet
78trust / 100

Rerank

by SiteCheck in Search & web

x402 APIPassing, checked 1 h ago

Orders up to 50 documents by relevance to a query with the BGE reranker and returns rank, index and score for each. Use it after a keyword or vector search to pick the best few. Scores compare documents within one call only.

POST https://api.sitecheck-api.workers.dev/api/rerank

Last 30 days

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Status and outage history · Atom feed

Uptime
100%
Response time
221 ms typical, 221 ms slowest 5%
Last check
1 h ago
Next check
any minute now

How to call it

POST https://api.sitecheck-api.workers.dev/api/rerank

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.sitecheck-api.workers.dev/api/rerank
content-type: application/json

{
  "documents": [
    "Our office is closed on public holidays.",
    "x402 lets an agent pay per request in USDC, with no account."
  ],
  "query": "how do I pay per call"
}

Parameters

ParameterTypeRequiredDescription
documentsarray of stringYes1 to 50 documents, up to 2,000 characters each
querystringYesThe question or search, up to 500 characters

Example response

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

{
  "checkedAt": "2026-10-14T05:12:26.366Z",
  "count": 2,
  "model": "@cf/baai/bge-reranker-base",
  "query": "how do I pay per call",
  "results": [
    {
      "document": "x402 lets an agent pay per request in USDC, with no account.",
      "index": 1,
      "rank": 1,
      "score": 0.057772
    },
    {
      "document": "Our office is closed on public holidays.",
      "index": 0,
      "rank": 2,
      "score": 0.000037
    }
  ]
}

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.sitecheck-api.workers.dev/api/rerank' \
  -H 'content-type: application/json' \
  --data-raw '{"documents":["Our office is closed on public holidays.","x402 lets an agent pay per request in USDC, with no account."],"query":"how do I pay per call"}'

# 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.sitecheck-api.workers.dev/api/rerank' \
  -H 'content-type: application/json' \
  --data-raw '{"documents":["Our office is closed on public holidays.","x402 lets an agent pay per request in USDC, with no account."],"query":"how do I pay per call"}' \
  | 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.sitecheck-api.workers.dev%2Fapi%2Frerank&method=POST
const res = await pay("https://api.sitecheck-api.workers.dev/api/rerank", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "documents": [
      "Our office is closed on public holidays.",
      "x402 lets an agent pay per request in USDC, with no account."
    ],
    "query": "how do I pay per call"
  }),
});
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.sitecheck-api.workers.dev/api/rerank",
        json={
            "documents": [
                "Our office is closed on public holidays.",
                "x402 lets an agent pay per request in USDC, with no account.",
            ],
            "query": "how do I pay per call",
        },
    )
    print(res.status_code, res.text)

Security scan

  • No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
1 h agoPassed4021.0 s$0.002
6 h agoPassed40251 ms$0.002
10 h agoPassed402221 ms$0.002