curl --request POST \
  --url https://api.cartesia.ai/v1/agents \
  --header 'Authorization: Bearer <token>' \
  --header 'Cartesia-Version: <cartesia-version>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "config": {
    "audio": {
      "input": {
        "keyterms": [
          "<string>"
        ]
      },
      "output": {
        "background_sound": {
          "file_id": "<string>",
          "volume": 1
        },
        "emotion": "<string>",
        "pronunciation_dictionary_id": "<string>",
        "speed": 1.05,
        "voice_id": "<string>",
        "volume": 1.25
      }
    },
    "initial_message": "<string>",
    "instructions": "<string>",
    "language": {
      "primary": "<string>"
    },
    "model": {
      "id": "<string>",
      "max_output_tokens": 2048,
      "temperature": 0.5
    },
    "system_tools": {
      "end_call": {
        "description": "<string>"
      },
      "send_dtmf": {
        "description": "<string>"
      },
      "transfer_to_number": {
        "transfers": [
          {
            "condition": "<string>",
            "destination": {
              "phone_number": "<string>",
              "type": "phone"
            }
          }
        ],
        "description": "<string>"
      }
    },
    "tools": [
      {
        "id": "<string>"
      }
    ]
  },
  "description": "<string>",
  "name": "<string>"
}
'

import requests

url = "https://api.cartesia.ai/v1/agents"

payload = {
    "config": {
        "audio": {
            "input": { "keyterms": ["<string>"] },
            "output": {
                "background_sound": {
                    "file_id": "<string>",
                    "volume": 1
                },
                "emotion": "<string>",
                "pronunciation_dictionary_id": "<string>",
                "speed": 1.05,
                "voice_id": "<string>",
                "volume": 1.25
            }
        },
        "initial_message": "<string>",
        "instructions": "<string>",
        "language": { "primary": "<string>" },
        "model": {
            "id": "<string>",
            "max_output_tokens": 2048,
            "temperature": 0.5
        },
        "system_tools": {
            "end_call": { "description": "<string>" },
            "send_dtmf": { "description": "<string>" },
            "transfer_to_number": {
                "transfers": [
                    {
                        "condition": "<string>",
                        "destination": {
                            "phone_number": "<string>",
                            "type": "phone"
                        }
                    }
                ],
                "description": "<string>"
            }
        },
        "tools": [{ "id": "<string>" }]
    },
    "description": "<string>",
    "name": "<string>"
}
headers = {
    "Cartesia-Version": "<cartesia-version>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'Cartesia-Version': '<cartesia-version>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    config: {
      audio: {
        input: {keyterms: ['<string>']},
        output: {
          background_sound: {file_id: '<string>', volume: 1},
          emotion: '<string>',
          pronunciation_dictionary_id: '<string>',
          speed: 1.05,
          voice_id: '<string>',
          volume: 1.25
        }
      },
      initial_message: '<string>',
      instructions: '<string>',
      language: {primary: '<string>'},
      model: {id: '<string>', max_output_tokens: 2048, temperature: 0.5},
      system_tools: {
        end_call: {description: '<string>'},
        send_dtmf: {description: '<string>'},
        transfer_to_number: {
          transfers: [
            {condition: '<string>', destination: {phone_number: '<string>', type: 'phone'}}
          ],
          description: '<string>'
        }
      },
      tools: [{id: '<string>'}]
    },
    description: '<string>',
    name: '<string>'
  })
};

fetch('https://api.cartesia.ai/v1/agents', 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.cartesia.ai/v1/agents",
  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([
    'config' => [
        'audio' => [
                'input' => [
                                'keyterms' => [
                                                                '<string>'
                                ]
                ],
                'output' => [
                                'background_sound' => [
                                                                'file_id' => '<string>',
                                                                'volume' => 1
                                ],
                                'emotion' => '<string>',
                                'pronunciation_dictionary_id' => '<string>',
                                'speed' => 1.05,
                                'voice_id' => '<string>',
                                'volume' => 1.25
                ]
        ],
        'initial_message' => '<string>',
        'instructions' => '<string>',
        'language' => [
                'primary' => '<string>'
        ],
        'model' => [
                'id' => '<string>',
                'max_output_tokens' => 2048,
                'temperature' => 0.5
        ],
        'system_tools' => [
                'end_call' => [
                                'description' => '<string>'
                ],
                'send_dtmf' => [
                                'description' => '<string>'
                ],
                'transfer_to_number' => [
                                'transfers' => [
                                                                [
                                                                                                                                'condition' => '<string>',
                                                                                                                                'destination' => [
                                                                                                                                                                                                                                                                'phone_number' => '<string>',
                                                                                                                                                                                                                                                                'type' => 'phone'
                                                                                                                                ]
                                                                ]
                                ],
                                'description' => '<string>'
                ]
        ],
        'tools' => [
                [
                                'id' => '<string>'
                ]
        ]
    ],
    'description' => '<string>',
    'name' => '<string>'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Cartesia-Version: <cartesia-version>",
    "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.cartesia.ai/v1/agents"

	payload := strings.NewReader("{\n  \"config\": {\n    \"audio\": {\n      \"input\": {\n        \"keyterms\": [\n          \"<string>\"\n        ]\n      },\n      \"output\": {\n        \"background_sound\": {\n          \"file_id\": \"<string>\",\n          \"volume\": 1\n        },\n        \"emotion\": \"<string>\",\n        \"pronunciation_dictionary_id\": \"<string>\",\n        \"speed\": 1.05,\n        \"voice_id\": \"<string>\",\n        \"volume\": 1.25\n      }\n    },\n    \"initial_message\": \"<string>\",\n    \"instructions\": \"<string>\",\n    \"language\": {\n      \"primary\": \"<string>\"\n    },\n    \"model\": {\n      \"id\": \"<string>\",\n      \"max_output_tokens\": 2048,\n      \"temperature\": 0.5\n    },\n    \"system_tools\": {\n      \"end_call\": {\n        \"description\": \"<string>\"\n      },\n      \"send_dtmf\": {\n        \"description\": \"<string>\"\n      },\n      \"transfer_to_number\": {\n        \"transfers\": [\n          {\n            \"condition\": \"<string>\",\n            \"destination\": {\n              \"phone_number\": \"<string>\",\n              \"type\": \"phone\"\n            }\n          }\n        ],\n        \"description\": \"<string>\"\n      }\n    },\n    \"tools\": [\n      {\n        \"id\": \"<string>\"\n      }\n    ]\n  },\n  \"description\": \"<string>\",\n  \"name\": \"<string>\"\n}")

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

	req.Header.Add("Cartesia-Version", "<cartesia-version>")
	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.cartesia.ai/v1/agents")
  .header("Cartesia-Version", "<cartesia-version>")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"config\": {\n    \"audio\": {\n      \"input\": {\n        \"keyterms\": [\n          \"<string>\"\n        ]\n      },\n      \"output\": {\n        \"background_sound\": {\n          \"file_id\": \"<string>\",\n          \"volume\": 1\n        },\n        \"emotion\": \"<string>\",\n        \"pronunciation_dictionary_id\": \"<string>\",\n        \"speed\": 1.05,\n        \"voice_id\": \"<string>\",\n        \"volume\": 1.25\n      }\n    },\n    \"initial_message\": \"<string>\",\n    \"instructions\": \"<string>\",\n    \"language\": {\n      \"primary\": \"<string>\"\n    },\n    \"model\": {\n      \"id\": \"<string>\",\n      \"max_output_tokens\": 2048,\n      \"temperature\": 0.5\n    },\n    \"system_tools\": {\n      \"end_call\": {\n        \"description\": \"<string>\"\n      },\n      \"send_dtmf\": {\n        \"description\": \"<string>\"\n      },\n      \"transfer_to_number\": {\n        \"transfers\": [\n          {\n            \"condition\": \"<string>\",\n            \"destination\": {\n              \"phone_number\": \"<string>\",\n              \"type\": \"phone\"\n            }\n          }\n        ],\n        \"description\": \"<string>\"\n      }\n    },\n    \"tools\": [\n      {\n        \"id\": \"<string>\"\n      }\n    ]\n  },\n  \"description\": \"<string>\",\n  \"name\": \"<string>\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.cartesia.ai/v1/agents")

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

request = Net::HTTP::Post.new(url)
request["Cartesia-Version"] = '<cartesia-version>'
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"config\": {\n    \"audio\": {\n      \"input\": {\n        \"keyterms\": [\n          \"<string>\"\n        ]\n      },\n      \"output\": {\n        \"background_sound\": {\n          \"file_id\": \"<string>\",\n          \"volume\": 1\n        },\n        \"emotion\": \"<string>\",\n        \"pronunciation_dictionary_id\": \"<string>\",\n        \"speed\": 1.05,\n        \"voice_id\": \"<string>\",\n        \"volume\": 1.25\n      }\n    },\n    \"initial_message\": \"<string>\",\n    \"instructions\": \"<string>\",\n    \"language\": {\n      \"primary\": \"<string>\"\n    },\n    \"model\": {\n      \"id\": \"<string>\",\n      \"max_output_tokens\": 2048,\n      \"temperature\": 0.5\n    },\n    \"system_tools\": {\n      \"end_call\": {\n        \"description\": \"<string>\"\n      },\n      \"send_dtmf\": {\n        \"description\": \"<string>\"\n      },\n      \"transfer_to_number\": {\n        \"transfers\": [\n          {\n            \"condition\": \"<string>\",\n            \"destination\": {\n              \"phone_number\": \"<string>\",\n              \"type\": \"phone\"\n            }\n          }\n        ],\n        \"description\": \"<string>\"\n      }\n    },\n    \"tools\": [\n      {\n        \"id\": \"<string>\"\n      }\n    ]\n  },\n  \"description\": \"<string>\",\n  \"name\": \"<string>\"\n}"

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

{
  "config": {
    "audio": {
      "input": {
        "keyterms": [
          "<string>"
        ],
        "noise_suppression": "off"
      },
      "output": {
        "background_sound": {
          "file_id": "<string>",
          "volume": 1
        },
        "emotion": "<string>",
        "pronunciation_dictionary_id": "<string>",
        "speed": 1.05,
        "voice_id": "<string>",
        "volume": 1.25
      }
    },
    "initial_message": "<string>",
    "instructions": "<string>",
    "language": {
      "primary": "<string>"
    },
    "model": {
      "id": "gpt-5.4-mini",
      "max_output_tokens": 2048,
      "temperature": 0.5
    },
    "system_tools": {
      "end_call": {
        "description": "<string>",
        "pre_tool_speech": "auto"
      },
      "send_dtmf": {
        "description": "<string>",
        "pre_tool_speech": "auto"
      },
      "transfer_to_number": {
        "description": "<string>",
        "pre_tool_speech": "auto",
        "transfers": [
          {
            "condition": "<string>",
            "destination": {
              "phone_number": "<string>",
              "type": "phone"
            }
          }
        ]
      }
    },
    "tools": [
      {
        "id": "<string>"
      }
    ]
  },
  "created_at": "2023-11-07T05:31:56Z",
  "description": "<string>",
  "id": "<string>",
  "name": "<string>",
  "updated_at": "2023-11-07T05:31:56Z",
  "version": {
    "created_at": "2023-11-07T05:31:56Z",
    "created_by": "<string>",
    "description": "<string>",
    "id": "<string>"
  }
}