curl --request POST \
  --url https://api.example.com/v1/chat/completions \
  --header 'Content-Type: application/json' \
  --data '
{
  "messages": [
    {
      "content": "You are a helpful assistant.",
      "role": "system"
    },
    {
      "content": "Say hello.",
      "role": "user"
    }
  ],
  "model": "openai:gpt-4o"
}
'

import requests

url = "https://api.example.com/v1/chat/completions"

payload = {
    "messages": [
        {
            "content": "You are a helpful assistant.",
            "role": "system"
        },
        {
            "content": "Say hello.",
            "role": "user"
        }
    ],
    "model": "openai:gpt-4o"
}
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({
    messages: [
      {content: 'You are a helpful assistant.', role: 'system'},
      {content: 'Say hello.', role: 'user'}
    ],
    model: 'openai:gpt-4o'
  })
};

fetch('https://api.example.com/v1/chat/completions', 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/v1/chat/completions",
  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([
    'messages' => [
        [
                'content' => 'You are a helpful assistant.',
                'role' => 'system'
        ],
        [
                'content' => 'Say hello.',
                'role' => 'user'
        ]
    ],
    'model' => 'openai:gpt-4o'
  ]),
  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/v1/chat/completions"

	payload := strings.NewReader("{\n  \"messages\": [\n    {\n      \"content\": \"You are a helpful assistant.\",\n      \"role\": \"system\"\n    },\n    {\n      \"content\": \"Say hello.\",\n      \"role\": \"user\"\n    }\n  ],\n  \"model\": \"openai:gpt-4o\"\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/v1/chat/completions")
  .header("Content-Type", "application/json")
  .body("{\n  \"messages\": [\n    {\n      \"content\": \"You are a helpful assistant.\",\n      \"role\": \"system\"\n    },\n    {\n      \"content\": \"Say hello.\",\n      \"role\": \"user\"\n    }\n  ],\n  \"model\": \"openai:gpt-4o\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.example.com/v1/chat/completions")

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  \"messages\": [\n    {\n      \"content\": \"You are a helpful assistant.\",\n      \"role\": \"system\"\n    },\n    {\n      \"content\": \"Say hello.\",\n      \"role\": \"user\"\n    }\n  ],\n  \"model\": \"openai:gpt-4o\"\n}"

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

{
  "id": "<string>",
  "created": 123,
  "model": "<string>",
  "choices": [
    {
      "message": {
        "content": "<string>",
        "role": "assistant"
      },
      "finish_reason": "<string>",
      "index": 0
    }
  ],
  "usage": {
    "prompt_tokens": 123,
    "completion_tokens": 123,
    "total_tokens": 123,
    "prompt_tokens_details": {
      "cached_tokens": 123
    }
  },
  "object": "chat.completion"
}

{
  "error": {
    "message": "<string>",
    "type": "<string>",
    "param": "<string>",
    "code": "<string>"
  }
}

<string>

{
  "error": {
    "message": "<string>",
    "type": "<string>",
    "param": "<string>",
    "code": "<string>"
  }
}

{
  "error": {
    "message": "<string>",
    "type": "<string>",
    "param": "<string>",
    "code": "<string>"
  }
}