ToolVet
75trust / 100

Arbitrage Price

by Usenami in Markets & finance

x402 APIPassing, checked 4 h ago

Cross-venue mark-price spread scan for crypto perpetuals — where the same perp trades at different marks across venues. Quoted spread is not net edge: it excludes fees, slippage and funding differences.

GET https://api.usenami.io/v1/perp/arbitrage/price

Last 30 days

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Status and outage history · Atom feed

Uptime
100%
Response time
583 ms typical, 818 ms slowest 5%
Last check
4 h ago
Next check
any minute now

How to call it

GET https://api.usenami.io/v1/perp/arbitrage/price

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

Built from the input schema. Replace the values with your own.

GET https://api.usenami.io/v1/perp/arbitrage/price?limit=1&min_diff_bps=1

Parameters

ParameterTypeRequiredDescription
limitintegerNoMax results. Default 50, max 100.
min_diff_bpsnumberNoThreshold in bps. Default 10.

Example response

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

{
  "count": 1,
  "min_diff_bps": 10,
  "opportunities": [
    {
      "max_price": 0.0855,
      "max_venue": "mexc",
      "mid_price": 0.0853,
      "min_price": 0.0851,
      "min_venue": "binance",
      "spread_bps": 46.89,
      "ticker": "DOGE",
      "updated_at": "2026-05-26T17:03:09Z",
      "venues_count": 14
    }
  ]
}

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://api.usenami.io/v1/perp/arbitrage/price?limit=1&min_diff_bps=1'

# 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://api.usenami.io/v1/perp/arbitrage/price?limit=1&min_diff_bps=1' \
  | 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%2Fapi.usenami.io%2Fv1%2Fperp%2Farbitrage%2Fprice
const res = await pay("https://api.usenami.io/v1/perp/arbitrage/price?limit=1&min_diff_bps=1");
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://api.usenami.io/v1/perp/arbitrage/price?limit=1&min_diff_bps=1")
    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 agoPassed402204 ms$0.003
8 h agoPassed402636 ms$0.003
12 h agoPassed402688 ms$0.003
16 h agoPassed402945 ms$0.003
20 h agoPassed402670 ms$0.003
23 h agoPassed402596 ms$0.003
27 h agoPassed402583 ms$0.003
31 h agoPassed402641 ms$0.003
35 h agoPassed402547 ms$0.003
38 h agoPassed402569 ms$0.003
42 h agoPassed402188 ms$0.003
45 h agoPassed402555 ms$0.003
2 days agoPassed402575 ms$0.003
2 days agoPassed402582 ms$0.003
2 days agoPassed402629 ms$0.003