curl --request POST \
  --url https://api.example.com/v1/realtime/calls \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: multipart/form-data' \
  --form sdp=@example-file \
  --form 'session={
  "type": "realtime",
  "audio": {
    "input": {
      "format": {
        "rate": 123,
        "type": "audio/pcm"
      },
      "noise_reduction": {},
      "transcription": {
        "keywords": [
          "<string>"
        ],
        "language": "<string>",
        "languages": [
          "<string>"
        ],
        "model": "<string>",
        "prompt": "<string>"
      },
      "turn_detection": {
        "type": "server_vad",
        "create_response": true,
        "idle_timeout_ms": 123,
        "interrupt_response": true,
        "prefix_padding_ms": 123,
        "silence_duration_ms": 123,
        "threshold": 123
      }
    },
    "output": {
      "format": {
        "rate": 123,
        "type": "audio/pcm"
      },
      "speed": 123,
      "voice": "<string>"
    }
  },
  "include": [
    "item.input_audio_transcription.logprobs"
  ],
  "instructions": "<string>",
  "max_output_tokens": 123,
  "model": "<string>",
  "output_modalities": [],
  "parallel_tool_calls": true,
  "prompt": {
    "id": "<string>",
    "variables": {},
    "version": "<string>"
  },
  "reasoning": {},
  "tools": [
    {
      "description": "<string>",
      "name": "<string>",
      "parameters": "<unknown>",
      "type": "function"
    }
  ],
  "tracing": "auto"
}'

import requests

url = "https://api.example.com/v1/realtime/calls"

files = { "sdp": ("example-file", open("example-file", "rb")) }
payload = { "session": "{
  \"type\": \"realtime\",
  \"audio\": {
    \"input\": {
      \"format\": {
        \"rate\": 123,
        \"type\": \"audio/pcm\"
      },
      \"noise_reduction\": {},
      \"transcription\": {
        \"keywords\": [
          \"<string>\"
        ],
        \"language\": \"<string>\",
        \"languages\": [
          \"<string>\"
        ],
        \"model\": \"<string>\",
        \"prompt\": \"<string>\"
      },
      \"turn_detection\": {
        \"type\": \"server_vad\",
        \"create_response\": true,
        \"idle_timeout_ms\": 123,
        \"interrupt_response\": true,
        \"prefix_padding_ms\": 123,
        \"silence_duration_ms\": 123,
        \"threshold\": 123
      }
    },
    \"output\": {
      \"format\": {
        \"rate\": 123,
        \"type\": \"audio/pcm\"
      },
      \"speed\": 123,
      \"voice\": \"<string>\"
    }
  },
  \"include\": [
    \"item.input_audio_transcription.logprobs\"
  ],
  \"instructions\": \"<string>\",
  \"max_output_tokens\": 123,
  \"model\": \"<string>\",
  \"output_modalities\": [],
  \"parallel_tool_calls\": true,
  \"prompt\": {
    \"id\": \"<string>\",
    \"variables\": {},
    \"version\": \"<string>\"
  },
  \"reasoning\": {},
  \"tools\": [
    {
      \"description\": \"<string>\",
      \"name\": \"<string>\",
      \"parameters\": \"<unknown>\",
      \"type\": \"function\"
    }
  ],
  \"tracing\": \"auto\"
}" }
headers = {"Authorization": "Bearer <token>"}

response = requests.post(url, data=payload, files=files, headers=headers)

print(response.text)

const form = new FormData();
form.append('sdp', '<string>');
form.append('session', '{
  "type": "realtime",
  "audio": {
    "input": {
      "format": {
        "rate": 123,
        "type": "audio/pcm"
      },
      "noise_reduction": {},
      "transcription": {
        "keywords": [
          "<string>"
        ],
        "language": "<string>",
        "languages": [
          "<string>"
        ],
        "model": "<string>",
        "prompt": "<string>"
      },
      "turn_detection": {
        "type": "server_vad",
        "create_response": true,
        "idle_timeout_ms": 123,
        "interrupt_response": true,
        "prefix_padding_ms": 123,
        "silence_duration_ms": 123,
        "threshold": 123
      }
    },
    "output": {
      "format": {
        "rate": 123,
        "type": "audio/pcm"
      },
      "speed": 123,
      "voice": "<string>"
    }
  },
  "include": [
    "item.input_audio_transcription.logprobs"
  ],
  "instructions": "<string>",
  "max_output_tokens": 123,
  "model": "<string>",
  "output_modalities": [],
  "parallel_tool_calls": true,
  "prompt": {
    "id": "<string>",
    "variables": {},
    "version": "<string>"
  },
  "reasoning": {},
  "tools": [
    {
      "description": "<string>",
      "name": "<string>",
      "parameters": "<unknown>",
      "type": "function"
    }
  ],
  "tracing": "auto"
}');

const options = {method: 'POST', headers: {Authorization: 'Bearer <token>'}};

options.body = form;

fetch('https://api.example.com/v1/realtime/calls', 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/realtime/calls",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"sdp\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"session\"\r\n\r\n{\r\n  \"type\": \"realtime\",\r\n  \"audio\": {\r\n    \"input\": {\r\n      \"format\": {\r\n        \"rate\": 123,\r\n        \"type\": \"audio/pcm\"\r\n      },\r\n      \"noise_reduction\": {},\r\n      \"transcription\": {\r\n        \"keywords\": [\r\n          \"<string>\"\r\n        ],\r\n        \"language\": \"<string>\",\r\n        \"languages\": [\r\n          \"<string>\"\r\n        ],\r\n        \"model\": \"<string>\",\r\n        \"prompt\": \"<string>\"\r\n      },\r\n      \"turn_detection\": {\r\n        \"type\": \"server_vad\",\r\n        \"create_response\": true,\r\n        \"idle_timeout_ms\": 123,\r\n        \"interrupt_response\": true,\r\n        \"prefix_padding_ms\": 123,\r\n        \"silence_duration_ms\": 123,\r\n        \"threshold\": 123\r\n      }\r\n    },\r\n    \"output\": {\r\n      \"format\": {\r\n        \"rate\": 123,\r\n        \"type\": \"audio/pcm\"\r\n      },\r\n      \"speed\": 123,\r\n      \"voice\": \"<string>\"\r\n    }\r\n  },\r\n  \"include\": [\r\n    \"item.input_audio_transcription.logprobs\"\r\n  ],\r\n  \"instructions\": \"<string>\",\r\n  \"max_output_tokens\": 123,\r\n  \"model\": \"<string>\",\r\n  \"output_modalities\": [],\r\n  \"parallel_tool_calls\": true,\r\n  \"prompt\": {\r\n    \"id\": \"<string>\",\r\n    \"variables\": {},\r\n    \"version\": \"<string>\"\r\n  },\r\n  \"reasoning\": {},\r\n  \"tools\": [\r\n    {\r\n      \"description\": \"<string>\",\r\n      \"name\": \"<string>\",\r\n      \"parameters\": \"<unknown>\",\r\n      \"type\": \"function\"\r\n    }\r\n  ],\r\n  \"tracing\": \"auto\"\r\n}\r\n-----011000010111000001101001--",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: multipart/form-data"
  ],
]);

$response = curl_exec($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/realtime/calls"

	payload := strings.NewReader("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"sdp\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"session\"\r\n\r\n{\r\n  \"type\": \"realtime\",\r\n  \"audio\": {\r\n    \"input\": {\r\n      \"format\": {\r\n        \"rate\": 123,\r\n        \"type\": \"audio/pcm\"\r\n      },\r\n      \"noise_reduction\": {},\r\n      \"transcription\": {\r\n        \"keywords\": [\r\n          \"<string>\"\r\n        ],\r\n        \"language\": \"<string>\",\r\n        \"languages\": [\r\n          \"<string>\"\r\n        ],\r\n        \"model\": \"<string>\",\r\n        \"prompt\": \"<string>\"\r\n      },\r\n      \"turn_detection\": {\r\n        \"type\": \"server_vad\",\r\n        \"create_response\": true,\r\n        \"idle_timeout_ms\": 123,\r\n        \"interrupt_response\": true,\r\n        \"prefix_padding_ms\": 123,\r\n        \"silence_duration_ms\": 123,\r\n        \"threshold\": 123\r\n      }\r\n    },\r\n    \"output\": {\r\n      \"format\": {\r\n        \"rate\": 123,\r\n        \"type\": \"audio/pcm\"\r\n      },\r\n      \"speed\": 123,\r\n      \"voice\": \"<string>\"\r\n    }\r\n  },\r\n  \"include\": [\r\n    \"item.input_audio_transcription.logprobs\"\r\n  ],\r\n  \"instructions\": \"<string>\",\r\n  \"max_output_tokens\": 123,\r\n  \"model\": \"<string>\",\r\n  \"output_modalities\": [],\r\n  \"parallel_tool_calls\": true,\r\n  \"prompt\": {\r\n    \"id\": \"<string>\",\r\n    \"variables\": {},\r\n    \"version\": \"<string>\"\r\n  },\r\n  \"reasoning\": {},\r\n  \"tools\": [\r\n    {\r\n      \"description\": \"<string>\",\r\n      \"name\": \"<string>\",\r\n      \"parameters\": \"<unknown>\",\r\n      \"type\": \"function\"\r\n    }\r\n  ],\r\n  \"tracing\": \"auto\"\r\n}\r\n-----011000010111000001101001--")

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

	req.Header.Add("Authorization", "Bearer <token>")

	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/realtime/calls")
  .header("Authorization", "Bearer <token>")
  .body("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"sdp\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"session\"\r\n\r\n{\r\n  \"type\": \"realtime\",\r\n  \"audio\": {\r\n    \"input\": {\r\n      \"format\": {\r\n        \"rate\": 123,\r\n        \"type\": \"audio/pcm\"\r\n      },\r\n      \"noise_reduction\": {},\r\n      \"transcription\": {\r\n        \"keywords\": [\r\n          \"<string>\"\r\n        ],\r\n        \"language\": \"<string>\",\r\n        \"languages\": [\r\n          \"<string>\"\r\n        ],\r\n        \"model\": \"<string>\",\r\n        \"prompt\": \"<string>\"\r\n      },\r\n      \"turn_detection\": {\r\n        \"type\": \"server_vad\",\r\n        \"create_response\": true,\r\n        \"idle_timeout_ms\": 123,\r\n        \"interrupt_response\": true,\r\n        \"prefix_padding_ms\": 123,\r\n        \"silence_duration_ms\": 123,\r\n        \"threshold\": 123\r\n      }\r\n    },\r\n    \"output\": {\r\n      \"format\": {\r\n        \"rate\": 123,\r\n        \"type\": \"audio/pcm\"\r\n      },\r\n      \"speed\": 123,\r\n      \"voice\": \"<string>\"\r\n    }\r\n  },\r\n  \"include\": [\r\n    \"item.input_audio_transcription.logprobs\"\r\n  ],\r\n  \"instructions\": \"<string>\",\r\n  \"max_output_tokens\": 123,\r\n  \"model\": \"<string>\",\r\n  \"output_modalities\": [],\r\n  \"parallel_tool_calls\": true,\r\n  \"prompt\": {\r\n    \"id\": \"<string>\",\r\n    \"variables\": {},\r\n    \"version\": \"<string>\"\r\n  },\r\n  \"reasoning\": {},\r\n  \"tools\": [\r\n    {\r\n      \"description\": \"<string>\",\r\n      \"name\": \"<string>\",\r\n      \"parameters\": \"<unknown>\",\r\n      \"type\": \"function\"\r\n    }\r\n  ],\r\n  \"tracing\": \"auto\"\r\n}\r\n-----011000010111000001101001--")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.example.com/v1/realtime/calls")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request.body = "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"sdp\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"session\"\r\n\r\n{\r\n  \"type\": \"realtime\",\r\n  \"audio\": {\r\n    \"input\": {\r\n      \"format\": {\r\n        \"rate\": 123,\r\n        \"type\": \"audio/pcm\"\r\n      },\r\n      \"noise_reduction\": {},\r\n      \"transcription\": {\r\n        \"keywords\": [\r\n          \"<string>\"\r\n        ],\r\n        \"language\": \"<string>\",\r\n        \"languages\": [\r\n          \"<string>\"\r\n        ],\r\n        \"model\": \"<string>\",\r\n        \"prompt\": \"<string>\"\r\n      },\r\n      \"turn_detection\": {\r\n        \"type\": \"server_vad\",\r\n        \"create_response\": true,\r\n        \"idle_timeout_ms\": 123,\r\n        \"interrupt_response\": true,\r\n        \"prefix_padding_ms\": 123,\r\n        \"silence_duration_ms\": 123,\r\n        \"threshold\": 123\r\n      }\r\n    },\r\n    \"output\": {\r\n      \"format\": {\r\n        \"rate\": 123,\r\n        \"type\": \"audio/pcm\"\r\n      },\r\n      \"speed\": 123,\r\n      \"voice\": \"<string>\"\r\n    }\r\n  },\r\n  \"include\": [\r\n    \"item.input_audio_transcription.logprobs\"\r\n  ],\r\n  \"instructions\": \"<string>\",\r\n  \"max_output_tokens\": 123,\r\n  \"model\": \"<string>\",\r\n  \"output_modalities\": [],\r\n  \"parallel_tool_calls\": true,\r\n  \"prompt\": {\r\n    \"id\": \"<string>\",\r\n    \"variables\": {},\r\n    \"version\": \"<string>\"\r\n  },\r\n  \"reasoning\": {},\r\n  \"tools\": [\r\n    {\r\n      \"description\": \"<string>\",\r\n      \"name\": \"<string>\",\r\n      \"parameters\": \"<unknown>\",\r\n      \"type\": \"function\"\r\n    }\r\n  ],\r\n  \"tracing\": \"auto\"\r\n}\r\n-----011000010111000001101001--"

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

"<string>"

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