curl --request POST \
  --url https://api.bendbasis.com/v1/funding/arbitrage/backtest \
  --header 'Content-Type: application/json' \
  --data '
{
  "long_market_id": 15036,
  "short_market_id": 125,
  "from": "2026-09-01",
  "to": "2026-09-02",
  "notional_per_leg": 10000,
  "execution_cost_pct": 0.4
}
'

import requests

url = "https://api.bendbasis.com/v1/funding/arbitrage/backtest"

payload = {
    "long_market_id": 15036,
    "short_market_id": 125,
    "from": "2026-09-01",
    "to": "2026-09-02",
    "notional_per_leg": 10000,
    "execution_cost_pct": 0.4
}
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    long_market_id: 15036,
    short_market_id: 125,
    from: '2026-09-01',
    to: '2026-09-02',
    notional_per_leg: 10000,
    execution_cost_pct: 0.4
  })
};

fetch('https://api.bendbasis.com/v1/funding/arbitrage/backtest', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.bendbasis.com/v1/funding/arbitrage/backtest",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'long_market_id' => 15036,
    'short_market_id' => 125,
    'from' => '2026-09-01',
    'to' => '2026-09-02',
    'notional_per_leg' => 10000,
    'execution_cost_pct' => 0.4
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.bendbasis.com/v1/funding/arbitrage/backtest"

	payload := strings.NewReader("{\n  \"long_market_id\": 15036,\n  \"short_market_id\": 125,\n  \"from\": \"2026-09-01\",\n  \"to\": \"2026-09-02\",\n  \"notional_per_leg\": 10000,\n  \"execution_cost_pct\": 0.4\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.bendbasis.com/v1/funding/arbitrage/backtest")
  .header("Content-Type", "application/json")
  .body("{\n  \"long_market_id\": 15036,\n  \"short_market_id\": 125,\n  \"from\": \"2026-09-01\",\n  \"to\": \"2026-09-02\",\n  \"notional_per_leg\": 10000,\n  \"execution_cost_pct\": 0.4\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.bendbasis.com/v1/funding/arbitrage/backtest")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"long_market_id\": 15036,\n  \"short_market_id\": 125,\n  \"from\": \"2026-09-01\",\n  \"to\": \"2026-09-02\",\n  \"notional_per_leg\": 10000,\n  \"execution_cost_pct\": 0.4\n}"

response = http.request(request)
puts response.read_body

{
  "data": {
    "from": "2026-09-01",
    "to": "2026-09-02",
    "notional_per_leg": 10000,
    "execution_cost_pct": 0.4,
    "summary": {
      "funding_pnl": -0.7729115921,
      "execution_cost": 40,
      "net_pnl": -40.7729115921,
      "net_return_pct": -0.4077291159,
      "net_apr": -148.8211273112
    },
    "series": [
      {
        "timestamp": "2026-09-01T00:00:00.000Z",
        "funding_pnl": -0.6303,
        "execution_cost": 20,
        "net_pnl": -20.6303,
        "cumulative_net_pnl": -20.6303
      },
      {
        "timestamp": "2026-09-01T08:00:00.000Z",
        "funding_pnl": 0,
        "execution_cost": 0,
        "net_pnl": 0,
        "cumulative_net_pnl": -20.6303
      },
      {
        "timestamp": "2026-09-01T16:00:00.000Z",
        "funding_pnl": -0.1426115921,
        "execution_cost": 20,
        "net_pnl": -20.1426115921,
        "cumulative_net_pnl": -40.7729115921
      }
    ]
  }
}

{
  "code": "VALIDATION_ERROR",
  "message": "Invalid parameter"
}