curl --request POST \
  --url https://api.vivix.ai/v1/realtime-avatar/character-sessions \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "character_id": "chr_a1b2c3d4e5f6789012345678abcdef01",
  "idempotency_key": "live-20260901-001"
}
'

import requests

url = "https://api.vivix.ai/v1/realtime-avatar/character-sessions"

payload = {
    "character_id": "chr_a1b2c3d4e5f6789012345678abcdef01",
    "idempotency_key": "live-20260901-001"
}
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({
    character_id: 'chr_a1b2c3d4e5f6789012345678abcdef01',
    idempotency_key: 'live-20260901-001'
  })
};

fetch('https://api.vivix.ai/v1/realtime-avatar/character-sessions', 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.vivix.ai/v1/realtime-avatar/character-sessions",
  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([
    'character_id' => 'chr_a1b2c3d4e5f6789012345678abcdef01',
    'idempotency_key' => 'live-20260901-001'
  ]),
  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.vivix.ai/v1/realtime-avatar/character-sessions"

	payload := strings.NewReader("{\n  \"character_id\": \"chr_a1b2c3d4e5f6789012345678abcdef01\",\n  \"idempotency_key\": \"live-20260901-001\"\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.vivix.ai/v1/realtime-avatar/character-sessions")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"character_id\": \"chr_a1b2c3d4e5f6789012345678abcdef01\",\n  \"idempotency_key\": \"live-20260901-001\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.vivix.ai/v1/realtime-avatar/character-sessions")

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  \"character_id\": \"chr_a1b2c3d4e5f6789012345678abcdef01\",\n  \"idempotency_key\": \"live-20260901-001\"\n}"

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

{
  "code": 0,
  "message": "success",
  "data": {
    "session_id": "avatar-session-123",
    "status": "active",
    "auto_close": {
      "disconnected_timeout_seconds": 60,
      "interaction_idle_timeout_seconds": 300
    },
    "region": "us-west",
    "session": {
      "mode": "video_avatar",
      "active_avatar_id": "host_a",
      "source_image_id": "front"
    },
    "control": {
      "url": "wss://api.vivix.ai/v1/realtime-avatar/control?session_id=avatar-session-123",
      "client_secret": "ctl_..."
    },
    "output": {
      "aspect_ratio": "9:16",
      "resolution": "480p",
      "fps": 24
    },
    "assets": {
      "audio": [
        {
          "asset_id": "welcome_jingle",
          "url": "https://cdn.example.com/audio/welcome-jingle.wav",
          "mime_type": "audio/wav"
        }
      ],
      "speech_text": [
        {
          "asset_id": "welcome_line",
          "text": "Welcome back. I saved your place."
        }
      ],
      "visual_prompts": [
        {
          "asset_id": "wave_small",
          "prompt": "smile and give a small wave"
        }
      ]
    },
    "conversation": {
      "instructions": "Answer as a concise livestream host.",
      "tools": [
        {
          "type": "function",
          "name": "lookup_product",
          "description": "Look up product details by product id.",
          "parameters": {
            "type": "object",
            "properties": {
              "product_id": {
                "type": "string"
              }
            },
            "required": [
              "product_id"
            ]
          }
        }
      ],
      "response_defaults": {
        "temperature": 0.7,
        "max_output_tokens": 512
      },
      "turn_detection": {
        "type": "server_vad",
        "silence_duration_ms": 500
      },
      "input_audio_transcription": {
        "enabled": true,
        "language": "auto"
      }
    },
    "avatars": [
      {
        "avatar_id": "host_a",
        "instructions": "You are Host A, a warm livestream host who gives concise product-focused replies.",
        "visual": {
          "source_images": [
            {
              "source_image_id": "front",
              "url": "https://cdn.example.com/avatars/host-a-front.png",
              "description": "A woman facing the camera in a brightly lit studio, front view.",
              "media_type": "image/png"
            },
            {
              "source_image_id": "side",
              "url": "https://cdn.example.com/avatars/host-a-side.png",
              "description": "The same woman in the same studio, side view.",
              "media_type": "image/png"
            }
          ],
          "default_source_image_id": "front"
        }
      },
      {
        "avatar_id": "host_b",
        "instructions": "You are Host B, a calm expert who gives brief technical explanations.",
        "visual": {
          "source_images": [
            {
              "source_image_id": "front",
              "url": "https://cdn.example.com/avatars/host-b-front.png",
              "description": "A man facing the camera in a brightly lit studio, front view.",
              "media_type": "image/png"
            }
          ],
          "default_source_image_id": "front"
        }
      }
    ],
    "delivery": {
      "media": {
        "transport": "trtc",
        "trtc": {
          "sdk_app_id": "1400000000",
          "room_id": "avatar-session-123",
          "user_id": "viewer",
          "user_sig": "...",
          "publisher_user_id": "publisher_xxx"
        }
      }
    },
    "model": "vivix-a1-stream",
    "expires_at": "2026-07-16T10:05:00Z"
  }
}