curl --request POST \
  --url https://api.impossibl.com/v1/responses \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "anthropic/claude-sonnet-4-5",
  "input": "<string>",
  "instructions": "<string>",
  "stream": false,
  "temperature": 123,
  "top_p": 123,
  "max_output_tokens": 123,
  "reasoning": {
    "context": "<string>"
  },
  "parallel_tool_calls": true,
  "tools": [
    {
      "type": "function",
      "name": "<string>",
      "description": "<string>",
      "parameters": {},
      "strict": true
    }
  ]
}
'

import requests

url = "https://api.impossibl.com/v1/responses"

payload = {
    "model": "anthropic/claude-sonnet-4-5",
    "input": "<string>",
    "instructions": "<string>",
    "stream": False,
    "temperature": 123,
    "top_p": 123,
    "max_output_tokens": 123,
    "reasoning": { "context": "<string>" },
    "parallel_tool_calls": True,
    "tools": [
        {
            "type": "function",
            "name": "<string>",
            "description": "<string>",
            "parameters": {},
            "strict": True
        }
    ]
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    model: 'anthropic/claude-sonnet-4-5',
    input: '<string>',
    instructions: '<string>',
    stream: false,
    temperature: 123,
    top_p: 123,
    max_output_tokens: 123,
    reasoning: {context: '<string>'},
    parallel_tool_calls: true,
    tools: [
      {
        type: 'function',
        name: '<string>',
        description: '<string>',
        parameters: {},
        strict: true
      }
    ]
  })
};

fetch('https://api.impossibl.com/v1/responses', 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.impossibl.com/v1/responses",
  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([
    'model' => 'anthropic/claude-sonnet-4-5',
    'input' => '<string>',
    'instructions' => '<string>',
    'stream' => false,
    'temperature' => 123,
    'top_p' => 123,
    'max_output_tokens' => 123,
    'reasoning' => [
        'context' => '<string>'
    ],
    'parallel_tool_calls' => true,
    'tools' => [
        [
                'type' => 'function',
                'name' => '<string>',
                'description' => '<string>',
                'parameters' => [
                                
                ],
                'strict' => true
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "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.impossibl.com/v1/responses"

	payload := strings.NewReader("{\n  \"model\": \"anthropic/claude-sonnet-4-5\",\n  \"input\": \"<string>\",\n  \"instructions\": \"<string>\",\n  \"stream\": false,\n  \"temperature\": 123,\n  \"top_p\": 123,\n  \"max_output_tokens\": 123,\n  \"reasoning\": {\n    \"context\": \"<string>\"\n  },\n  \"parallel_tool_calls\": true,\n  \"tools\": [\n    {\n      \"type\": \"function\",\n      \"name\": \"<string>\",\n      \"description\": \"<string>\",\n      \"parameters\": {},\n      \"strict\": true\n    }\n  ]\n}")

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

	req.Header.Add("Authorization", "Bearer <token>")
	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.impossibl.com/v1/responses")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"model\": \"anthropic/claude-sonnet-4-5\",\n  \"input\": \"<string>\",\n  \"instructions\": \"<string>\",\n  \"stream\": false,\n  \"temperature\": 123,\n  \"top_p\": 123,\n  \"max_output_tokens\": 123,\n  \"reasoning\": {\n    \"context\": \"<string>\"\n  },\n  \"parallel_tool_calls\": true,\n  \"tools\": [\n    {\n      \"type\": \"function\",\n      \"name\": \"<string>\",\n      \"description\": \"<string>\",\n      \"parameters\": {},\n      \"strict\": true\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.impossibl.com/v1/responses")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"model\": \"anthropic/claude-sonnet-4-5\",\n  \"input\": \"<string>\",\n  \"instructions\": \"<string>\",\n  \"stream\": false,\n  \"temperature\": 123,\n  \"top_p\": 123,\n  \"max_output_tokens\": 123,\n  \"reasoning\": {\n    \"context\": \"<string>\"\n  },\n  \"parallel_tool_calls\": true,\n  \"tools\": [\n    {\n      \"type\": \"function\",\n      \"name\": \"<string>\",\n      \"description\": \"<string>\",\n      \"parameters\": {},\n      \"strict\": true\n    }\n  ]\n}"

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

{
  "id": "resp_...",
  "object": "response",
  "created_at": 123,
  "status": "in_progress",
  "incomplete_details": {
    "reason": "max_output_tokens"
  },
  "model": "<string>",
  "output_text": "<string>",
  "output": [
    {
      "type": "reasoning",
      "id": "<string>",
      "status": "<string>",
      "role": "assistant",
      "content": [
        {
          "type": "output_text",
          "text": "<string>",
          "annotations": [
            {}
          ]
        }
      ],
      "call_id": "<string>",
      "name": "<string>",
      "arguments": "<string>",
      "summary": [
        {
          "type": "summary_text",
          "text": "<string>"
        }
      ]
    }
  ],
  "usage": {
    "input_tokens": 123,
    "output_tokens": 123,
    "total_tokens": 123,
    "input_tokens_details": {
      "cached_tokens": 123
    },
    "output_tokens_details": {
      "reasoning_tokens": 123
    },
    "server_side_tool_calls": 123
  },
  "service_tier": "<string>"
}

{
  "error": {
    "message": "`model` and `messages` are required",
    "type": "invalid_request_error"
  }
}

{
  "error": {
    "message": "Invalid API key",
    "type": "authentication_error"
  }
}

{
  "error": {
    "message": "Insufficient credits. Top up to continue.",
    "type": "insufficient_quota"
  }
}

{
  "error": {
    "message": "Unknown model: foo/bar",
    "type": "invalid_request_error"
  }
}

{
  "error": {
    "message": "permission-denied: ...",
    "type": "upstream_error"
  }
}

{
  "error": {
    "message": "Provider not configured: missing OPENAI_API_KEY",
    "type": "provider_not_configured"
  }
}