ToolVet
80trust / 100

Rerank

by Citiview Agent Market in Search & web

x402 APIPassing, checked 4 h ago

Rerank up to 100 documents by relevance to a query (BGE reranker). Returns indices and scores, best first. Drop-in step for RAG and search pipelines. Also callable as GET with the same fields as query parameters.

GET
https://agents.citiviewgroup.com/v1/rerank
Price
$0.003
per call in USDC
Uptime
100%
last 30 days
Response time
67 ms
1.3 s slowest 5%
Last check
Passed
4 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

GET https://agents.citiviewgroup.com/v1/rerank

Each call costs $0.003 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.

GET https://agents.citiviewgroup.com/v1/rerank?documents=Bananas+are+yellow.%7Cx402+lets+AI+agents+pay+per+request+with+USDC.&query=how+do+agents+pay+for+APIs

Parameters

ParameterTypeRequiredDescription
documentsstringYesseparate items with |
querystringYes
top_kintegerNo

Example response

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

{
  "query": "how do agents pay for APIs",
  "results": [
    {
      "document": "x402 lets AI agents pay per request with USDC.",
      "index": 1,
      "score": 0.27
    }
  ]
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.003.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://agents.citiviewgroup.com/v1/rerank?documents=Bananas+are+yellow.%7Cx402+lets+AI+agents+pay+per+request+with+USDC.&query=how+do+agents+pay+for+APIs'

# 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 - 'https://agents.citiviewgroup.com/v1/rerank?documents=Bananas+are+yellow.%7Cx402+lets+AI+agents+pay+per+request+with+USDC.&query=how+do+agents+pay+for+APIs' \
  | 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 $0.003 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.003" });
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 $0.003 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fagents.citiviewgroup.com%2Fv1%2Frerank
const res = await pay("https://agents.citiviewgroup.com/v1/rerank?documents=Bananas+are+yellow.%7Cx402+lets+AI+agents+pay+per+request+with+USDC.&query=how+do+agents+pay+for+APIs");
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 $0.003 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.003"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://agents.citiviewgroup.com/v1/rerank?documents=Bananas+are+yellow.%7Cx402+lets+AI+agents+pay+per+request+with+USDC.&query=how+do+agents+pay+for+APIs")
    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
4 h agoPassed40267 ms$0.003
8 h agoPassed4021.3 s$0.003
12 h agoPassed40251 ms$0.003
16 h agoPassed40253 ms$0.003
21 h agoPassed4021.2 s$0.003
Show 6 older checks
25 h agoPassed4021.1 s$0.002
29 h agoPassed402376 ms$0.002
33 h agoPassed40260 ms$0.002
37 h agoPassed40244 ms$0.002
41 h agoPassed402788 ms$0.002
45 h agoPassed40256 ms$0.002

History

14 Oct 2026Price changed from $0.002 to $0.003