ToolVet
72trust / 100

Dex Spread

by DEX Price Spread in Onchain & crypto

x402 APIPassing, checked 6 h ago

A token on several Base DEXes should cost about the same on each; a gap is either an arbitrage window or, on a thin pool, a mispricing that signals wash/manipulation. Compares the price across the LIQUID venues (over a floor, default $5k): tight (trustworthy), arb_window, wide (likely mispricing), or single_venue (one pool, as manipulable as it is thin). Separates real arbitrage from thin-pool noise. Snapshots — confirm with a live quote. Not financial advice.

GET
https://402.com.tr/api/x402/dex-spread
Price
$0.02
per call in USDC
Uptime
100%
last 30 days
Response time
509 ms
635 ms slowest 5%
Last check
Passed
6 h ago, next in 16 min

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed · Watch with other listings

How to call it

GET https://402.com.tr/api/x402/dex-spread

Each call costs $0.02 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://402.com.tr/api/x402/dex-spread?address=0x4ed4E862860beD51a9570b96d89aF5E1B0Efefed&minLiquidityUsd=5000

Parameters

ParameterTypeRequiredDescription
addressstringYesToken contract address
minLiquidityUsdstringNoLiquidity floor per venue (optional, default 5000)

Example response

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

{
  "address": "0x4ed4E862860beD51a9570b96d89aF5E1B0Efefed",
  "checkedAt": "2026-10-11T17:23:41.464Z",
  "liquidVenues": 6,
  "minLiquidityUsd": 5000,
  "spreadPct": 2.47,
  "totalVenues": 28,
  "venuesCount": 6,
  "verdict": "arb_window"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.02.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://402.com.tr/api/x402/dex-spread?address=0x4ed4E862860beD51a9570b96d89aF5E1B0Efefed&minLiquidityUsd=5000'

# 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://402.com.tr/api/x402/dex-spread?address=0x4ed4E862860beD51a9570b96d89aF5E1B0Efefed&minLiquidityUsd=5000' \
  | 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 $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
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 $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2F402.com.tr%2Fapi%2Fx402%2Fdex-spread
const res = await pay("https://402.com.tr/api/x402/dex-spread?address=0x4ed4E862860beD51a9570b96d89aF5E1B0Efefed&minLiquidityUsd=5000");
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 $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://402.com.tr/api/x402/dex-spread?address=0x4ed4E862860beD51a9570b96d89aF5E1B0Efefed&minLiquidityUsd=5000")
    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
6 h agoPassed402509 ms$0.02
16 h agoPassed402537 ms$0.02
26 h agoPassed402609 ms$0.02
36 h agoPassed402515 ms$0.02
40 h agoPassed402416 ms$0.02
Show 10 older checks
44 h agoPassed402568 ms$0.02
2 days agoPassed402454 ms$0.02
2 days agoPassed402440 ms$0.02
2 days agoPassed402564 ms$0.02
3 days agoPassed402459 ms$0.02
3 days agoPassed402606 ms$0.02
3 days agoPassed402587 ms$0.02
3 days agoPassed402657 ms$0.02
3 days agoPassed402508 ms$0.02
4 days agoPassed402613 ms$0.02