curl --request GET \
  --url https://drb.coinbase.com/api/v2/private/get_settlement_history_by_instrument \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "id": 2192,
  "jsonrpc": "2.0",
  "method": "private/get_settlement_history_by_instrument",
  "params": {
    "count": 1,
    "instrument_name": "ETH-22FEB19",
    "type": "settlement"
  }
}
'

import requests

url = "https://drb.coinbase.com/api/v2/private/get_settlement_history_by_instrument"

payload = {
    "id": 2192,
    "jsonrpc": "2.0",
    "method": "private/get_settlement_history_by_instrument",
    "params": {
        "count": 1,
        "instrument_name": "ETH-22FEB19",
        "type": "settlement"
    }
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'GET',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    id: 2192,
    jsonrpc: '2.0',
    method: 'private/get_settlement_history_by_instrument',
    params: {count: 1, instrument_name: 'ETH-22FEB19', type: 'settlement'}
  })
};

fetch('https://drb.coinbase.com/api/v2/private/get_settlement_history_by_instrument', 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://drb.coinbase.com/api/v2/private/get_settlement_history_by_instrument",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_POSTFIELDS => json_encode([
    'id' => 2192,
    'jsonrpc' => '2.0',
    'method' => 'private/get_settlement_history_by_instrument',
    'params' => [
        'count' => 1,
        'instrument_name' => 'ETH-22FEB19',
        'type' => 'settlement'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "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://drb.coinbase.com/api/v2/private/get_settlement_history_by_instrument"

	payload := strings.NewReader("{\n  \"id\": 2192,\n  \"jsonrpc\": \"2.0\",\n  \"method\": \"private/get_settlement_history_by_instrument\",\n  \"params\": {\n    \"count\": 1,\n    \"instrument_name\": \"ETH-22FEB19\",\n    \"type\": \"settlement\"\n  }\n}")

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

	req.Header.Add("Authorization", "Bearer <token>")
	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.get("https://drb.coinbase.com/api/v2/private/get_settlement_history_by_instrument")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"id\": 2192,\n  \"jsonrpc\": \"2.0\",\n  \"method\": \"private/get_settlement_history_by_instrument\",\n  \"params\": {\n    \"count\": 1,\n    \"instrument_name\": \"ETH-22FEB19\",\n    \"type\": \"settlement\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://drb.coinbase.com/api/v2/private/get_settlement_history_by_instrument")

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

request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"id\": 2192,\n  \"jsonrpc\": \"2.0\",\n  \"method\": \"private/get_settlement_history_by_instrument\",\n  \"params\": {\n    \"count\": 1,\n    \"instrument_name\": \"ETH-22FEB19\",\n    \"type\": \"settlement\"\n  }\n}"

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

{
  "id": 2192,
  "jsonrpc": "2.0",
  "result": {
    "continuation": "xY7T6cusbMBNpH9SNmKb94jXSBxUPojJEdCPL4YociHBUgAhWQvEP",
    "settlements": [
      {
        "index_price": 119.8,
        "instrument_name": "ETH-22FEB19",
        "mark_price": 121.67,
        "position": -66,
        "profit_loss": -0.001783937,
        "session_profit_loss": 0.038358299,
        "timestamp": 1550475692526,
        "type": "settlement"
      }
    ]
  }
}