curl --request POST \
  --url https://api.example.com/messages \
  --header 'Content-Type: application/json' \
  --data '
{
  "task_id": "<string>",
  "content": {
    "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"

payload = {
    "task_id": "<string>",
    "content": {
        "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>',
    content: {
      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', 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",
  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>',
    'content' => [
        '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"

	payload := strings.NewReader("{\n  \"task_id\": \"<string>\",\n  \"content\": {\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  \"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")
  .header("Content-Type", "application/json")
  .body("{\n  \"task_id\": \"<string>\",\n  \"content\": {\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  \"created_at\": \"2023-11-07T05:31:56Z\"\n}")
  .asString();

require 'uri'
require 'net/http'

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

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  \"content\": {\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  \"created_at\": \"2023-11-07T05:31:56Z\"\n}"

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

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

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