curl https://api.assistantrouter.com/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $ASSISTANTROUTER_API_KEY" \
  -d '{
    "model": "anthropic/claude-haiku-4.5",
    "messages": [
      {"role": "system", "content": "You are a helpful assistant."},
      {"role": "user", "content": "Hello!"}
    ]
  }'

package main

import (
    "bytes"
    "encoding/json"
    "net/http"
    "os"
)

func main() {
    payload := map[string]interface{}{
        "model": "anthropic/claude-haiku-4.5",
        "messages": []map[string]string{
            {"role": "user", "content": "Hello!"},
        },
    }

    body, _ := json.Marshal(payload)

    req, _ := http.NewRequest(
        "POST",
        "https://api.assistantrouter.com/v1/chat/completions",
        bytes.NewBuffer(body),
    )

    req.Header.Set("Content-Type", "application/json")
    req.Header.Set("Authorization", "Bearer "+os.Getenv("ASSISTANTROUTER_API_KEY"))

    client := &http.Client{}
    resp, _ := client.Do(req)
    defer resp.Body.Close()
}

require 'net/http'
require 'json'

uri = URI('https://api.assistantrouter.com/v1/chat/completions')
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true

request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request['Authorization'] = "Bearer #{ENV['ASSISTANTROUTER_API_KEY']}"
request.body = {
  model: 'anthropic/claude-haiku-4.5',
  messages: [{ role: 'user', content: 'Hello!' }]
}.to_json

response = http.request(request)
puts JSON.parse(response.body)

<?php
$ch = curl_init('https://api.assistantrouter.com/v1/chat/completions');

curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => [
        'Content-Type: application/json',
        'Authorization: Bearer ' . getenv('ASSISTANTROUTER_API_KEY'),
    ],
    CURLOPT_POSTFIELDS => json_encode([
        'model' => 'anthropic/claude-haiku-4.5',
        'messages' => [
            ['role' => 'user', 'content' => 'Hello!']
        ]
    ]),
]);

$response = curl_exec($ch);
curl_close($ch);

$data = json_decode($response, true);
echo $data['choices'][0]['message']['content'];