curl --request POST \
  --url https://api.otark.energy/v1/transactions/bulk \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <api-key>' \
  --data '
{
  "ids": [
    "txn_k8m2p4q7r1",
    "txn_j5n3w8v2x6",
    "txn_h2b7f9d4g3"
  ],
  "include_assets": false
}
'

import requests

url = "https://api.otark.energy/v1/transactions/bulk"

payload = {
    "ids": ["txn_k8m2p4q7r1", "txn_j5n3w8v2x6", "txn_h2b7f9d4g3"],
    "include_assets": False
}
headers = {
    "X-Api-Key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'X-Api-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    ids: ['txn_k8m2p4q7r1', 'txn_j5n3w8v2x6', 'txn_h2b7f9d4g3'],
    include_assets: false
  })
};

fetch('https://api.otark.energy/v1/transactions/bulk', 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.otark.energy/v1/transactions/bulk",
  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([
    'ids' => [
        'txn_k8m2p4q7r1',
        'txn_j5n3w8v2x6',
        'txn_h2b7f9d4g3'
    ],
    'include_assets' => false
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-Api-Key: <api-key>"
  ],
]);

$response = curl_exec($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.otark.energy/v1/transactions/bulk"

	payload := strings.NewReader("{\n  \"ids\": [\n    \"txn_k8m2p4q7r1\",\n    \"txn_j5n3w8v2x6\",\n    \"txn_h2b7f9d4g3\"\n  ],\n  \"include_assets\": false\n}")

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

	req.Header.Add("X-Api-Key", "<api-key>")
	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.otark.energy/v1/transactions/bulk")
  .header("X-Api-Key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"ids\": [\n    \"txn_k8m2p4q7r1\",\n    \"txn_j5n3w8v2x6\",\n    \"txn_h2b7f9d4g3\"\n  ],\n  \"include_assets\": false\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.otark.energy/v1/transactions/bulk")

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

request = Net::HTTP::Post.new(url)
request["X-Api-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"ids\": [\n    \"txn_k8m2p4q7r1\",\n    \"txn_j5n3w8v2x6\",\n    \"txn_h2b7f9d4g3\"\n  ],\n  \"include_assets\": false\n}"

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

{
  "transactions": [
    {
      "id": "txn_k8m2p4q7r1",
      "type": "ppa",
      "contract_id": "con_a1b2c3d4",
      "status": "valid",
      "version": 2,
      "sender": {
        "eic": "11YWINDPARKNO--A",
        "asset_id": "ast_w1x2y3z4",
        "tso": "DE_TENNET"
      },
      "receiver": {
        "eic": "11YGREENENERGY-Z",
        "tso": "DE_TENNET"
      },
      "delivery_start": "2026-01-15T14:00:00Z",
      "delivery_end": "2026-01-15T14:15:00Z",
      "slot_number": 57,
      "volume": 12.5,
      "created_at": "2026-01-14T18:00:00Z",
      "previous_transaction_id": "txn_j5n3w8v2x6"
    }
  ],
  "assets": [
    {
      "id": "ast_w1x2y3z4",
      "name": "Zonnepark De Wilgen",
      "nominal_power": 25,
      "technology": "solar",
      "tso": "DE_TENNET"
    }
  ]
}

{
  "type": "https://brp.otark.team/errors/validation",
  "title": "Validation Failed",
  "status": 400,
  "instance": "/v1/customers/cust_r8s9t0u1",
  "errors": [
    {
      "field": "balance_group.tso",
      "code": "invalid_enum_value",
      "message": "Invalid enum value. Expected 'DE_AMPRION' | 'DE_TENNET' | 'DE_TRANSNET_BW' | 'DE_50HERTZ', received 'INVALID'"
    }
  ]
}

{
  "type": "https://brp.otark.team/errors/invalid_api_key",
  "title": "Invalid API Key",
  "status": 401
}

{
  "type": "https://brp.otark.team/errors/insufficient_scopes",
  "title": "Insufficient API Key Scopes",
  "status": 403,
  "detail": "Missing scope: customers:write. Please create a new API key with the required scopes."
}