curl --request POST \
  --url https://api.example.com/messages/batch \
  --header 'Content-Type: application/json' \
  --data '
{
  "task_id": "<string>",
  "contents": [
    {
      "content": "<string>",
      "type": "text",
      "style": "static",
      "format": "plain",
      "attachments": [
        {
          "file_id": "<string>",
          "name": "<string>",
          "size": 123,
          "type": "<string>"
        }
      ]
    }
  ],
  "created_at": "2023-11-07T05:31:56Z"
}
'

import requests

url = "https://api.example.com/messages/batch"

payload = {
    "task_id": "<string>",
    "contents": [
        {
            "content": "<string>",
            "type": "text",
            "style": "static",
            "format": "plain",
            "attachments": [
                {
                    "file_id": "<string>",
                    "name": "<string>",
                    "size": 123,
                    "type": "<string>"
                }
            ]
        }
    ],
    "created_at": "2023-11-07T05:31:56Z"
}
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({
    task_id: '<string>',
    contents: [
      {
        content: '<string>',
        type: 'text',
        style: 'static',
        format: 'plain',
        attachments: [{file_id: '<string>', name: '<string>', size: 123, type: '<string>'}]
      }
    ],
    created_at: '2023-11-07T05:31:56Z'
  })
};

fetch('https://api.example.com/messages/batch', 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.example.com/messages/batch",
  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([
    'task_id' => '<string>',
    'contents' => [
        [
                'content' => '<string>',
                'type' => 'text',
                'style' => 'static',
                'format' => 'plain',
                'attachments' => [
                                [
                                                                'file_id' => '<string>',
                                                                'name' => '<string>',
                                                                'size' => 123,
                                                                'type' => '<string>'
                                ]
                ]
        ]
    ],
    'created_at' => '2023-11-07T05:31:56Z'
  ]),
  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.example.com/messages/batch"

	payload := strings.NewReader("{\n  \"task_id\": \"<string>\",\n  \"contents\": [\n    {\n      \"content\": \"<string>\",\n      \"type\": \"text\",\n      \"style\": \"static\",\n      \"format\": \"plain\",\n      \"attachments\": [\n        {\n          \"file_id\": \"<string>\",\n          \"name\": \"<string>\",\n          \"size\": 123,\n          \"type\": \"<string>\"\n        }\n      ]\n    }\n  ],\n  \"created_at\": \"2023-11-07T05:31:56Z\"\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.example.com/messages/batch")
  .header("Content-Type", "application/json")
  .body("{\n  \"task_id\": \"<string>\",\n  \"contents\": [\n    {\n      \"content\": \"<string>\",\n      \"type\": \"text\",\n      \"style\": \"static\",\n      \"format\": \"plain\",\n      \"attachments\": [\n        {\n          \"file_id\": \"<string>\",\n          \"name\": \"<string>\",\n          \"size\": 123,\n          \"type\": \"<string>\"\n        }\n      ]\n    }\n  ],\n  \"created_at\": \"2023-11-07T05:31:56Z\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.example.com/messages/batch")

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  \"task_id\": \"<string>\",\n  \"contents\": [\n    {\n      \"content\": \"<string>\",\n      \"type\": \"text\",\n      \"style\": \"static\",\n      \"format\": \"plain\",\n      \"attachments\": [\n        {\n          \"file_id\": \"<string>\",\n          \"name\": \"<string>\",\n          \"size\": 123,\n          \"type\": \"<string>\"\n        }\n      ]\n    }\n  ],\n  \"created_at\": \"2023-11-07T05:31:56Z\"\n}"

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

[
  {
    "task_id": "<string>",
    "content": {
      "content": "<string>",
      "type": "text",
      "style": "static",
      "format": "plain",
      "attachments": [
        {
          "file_id": "<string>",
          "name": "<string>",
          "size": 123,
          "type": "<string>"
        }
      ]
    },
    "id": "<string>",
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z"
  }
]

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>",
      "input": "<unknown>",
      "ctx": {}
    }
  ]
}