ToolVet
15trust / 100

Spread Tick

by ArbiPulse in Onchain & crypto

x402 APIFailing, checked 3 h ago

Cross-exchange spread tick — ONE $0.02 call returns the live executable spread for a pair across Binance, Coinbase, Kraken, Bybit: best bid venue, best ask venue, spread in bps, and a deterministic TRADE / THIN / NONE verdict. Built for arbitrage monitoring loops; escalate to /api/crypto ($0.07) for the full CEX arbitrage read with fees and transfer paths. 30s freshness, no LLM in the path.

GET
https://arbipulse.theaslangroupllc.com/api/spread-tick
Price
$0.02
per call in USDC
Uptime
0.0%
last 30 days
Response time
-
no timed checks yet
Last check
Failed
3 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Latest check failed 3 h ago: Amount "0.02" is not in atomic token units

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

How to call it

GET https://arbipulse.theaslangroupllc.com/api/spread-tick

Each call costs $0.02 in USDC on Polygon, 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://arbipulse.theaslangroupllc.com/api/spread-tick?pair=Trading+pair+%28default+BTC%2FUSDT%29%3B+e.g.+BTC%2FUSDT+%7C+ETH%2FUSDT+%7C+SOL%2FUSDT+%7C+BTC%2FUSD+%7C+ETH%2FUSD

Parameters

ParameterTypeRequiredDescription
pairstringNo

Example response

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

{
  "buy_at": {
    "ask": 118211.1,
    "exchange": "Kraken"
  },
  "deep_read": "https://arbipulse.vercel.app/api/crypto ($0.07)",
  "pair": "BTC/USDT",
  "sell_at": {
    "bid": 118260.8,
    "exchange": "Binance"
  },
  "spread_bps": 4.2,
  "verdict": "THIN"
}

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://arbipulse.theaslangroupllc.com/api/spread-tick?pair=Trading+pair+%28default+BTC%2FUSDT%29%3B+e.g.+BTC%2FUSDT+%7C+ETH%2FUSDT+%7C+SOL%2FUSDT+%7C+BTC%2FUSD+%7C+ETH%2FUSD'

# 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://arbipulse.theaslangroupllc.com/api/spread-tick?pair=Trading+pair+%28default+BTC%2FUSDT%29%3B+e.g.+BTC%2FUSDT+%7C+ETH%2FUSDT+%7C+SOL%2FUSDT+%7C+BTC%2FUSD+%7C+ETH%2FUSD' \
  | 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%2Farbipulse.theaslangroupllc.com%2Fapi%2Fspread-tick
const res = await pay("https://arbipulse.theaslangroupllc.com/api/spread-tick?pair=Trading+pair+%28default+BTC%2FUSDT%29%3B+e.g.+BTC%2FUSDT+%7C+ETH%2FUSDT+%7C+SOL%2FUSDT+%7C+BTC%2FUSD+%7C+ETH%2FUSD");
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://arbipulse.theaslangroupllc.com/api/spread-tick?pair=Trading+pair+%28default+BTC%2FUSDT%29%3B+e.g.+BTC%2FUSDT+%7C+ETH%2FUSDT+%7C+SOL%2FUSDT+%7C+BTC%2FUSD+%7C+ETH%2FUSD")
    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
3 h agoAmount "0.02" is not in atomic token units4022.1 s$0.02
9 h agoAmount "0.02" is not in atomic token units402208 ms$0.02
14 h agoAmount "0.02" is not in atomic token units4021.6 s$0.02
20 h agoAmount "0.02" is not in atomic token units402279 ms$0.02
26 h agoAmount "0.02" is not in atomic token units402212 ms$0.02
Show 7 older checks
31 h agoAmount "0.02" is not in atomic token units4021.6 s$0.02
37 h agoAmount "0.02" is not in atomic token units402208 ms$0.02
42 h agoAmount "0.02" is not in atomic token units402199 ms$0.02
47 h agoAmount "0.02" is not in atomic token units402218 ms$0.02
2 days agoAmount "0.02" is not in atomic token units402275 ms$0.02
2 days agoAmount "0.02" is not in atomic token units402168 ms$0.02
3 days agoAmount "0.02" is not in atomic token units402184 ms$0.02