Create a voice pipeline config for an agent or persona (1:1)

POST

voice

configs

curl --request POST \
  --url https://api-sandbox.featherhq.com/v1/voice/configs \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "voice_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "voice_tuning": {},
  "stt_provider": "<string>",
  "stt_model": "<string>",
  "stt_provider_data": {},
  "tts_speed": 5,
  "tts_provider_data": {
    "model": "<string>",
    "expressive_speech": false
  },
  "vad_provider_data": {},
  "local_vad_params": {
    "confidence": 0.7,
    "start_secs": 0.2,
    "stop_secs": 0.5,
    "min_volume": 0.6
  },
  "turn_analyzer_params": {
    "stop_secs": 2,
    "pre_speech_ms": 500,
    "max_duration_secs": 8
  },
  "pronunciation_overrides": {},
  "noise_cancellation_enabled": true,
  "language": "<string>",
  "locale": "<string>",
  "multilingual_enabled": true,
  "multilingual_languages": [
    "<string>"
  ],
  "text": "<string>",
  "instructions": "<string>",
  "interruptible": true,
  "ai_disclosure_text": "<string>",
  "agent_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "team_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "persona_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
}
'

import requests

url = "https://api-sandbox.featherhq.com/v1/voice/configs"

payload = {
    "voice_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "voice_tuning": {},
    "stt_provider": "<string>",
    "stt_model": "<string>",
    "stt_provider_data": {},
    "tts_speed": 5,
    "tts_provider_data": {
        "model": "<string>",
        "expressive_speech": False
    },
    "vad_provider_data": {},
    "local_vad_params": {
        "confidence": 0.7,
        "start_secs": 0.2,
        "stop_secs": 0.5,
        "min_volume": 0.6
    },
    "turn_analyzer_params": {
        "stop_secs": 2,
        "pre_speech_ms": 500,
        "max_duration_secs": 8
    },
    "pronunciation_overrides": {},
    "noise_cancellation_enabled": True,
    "language": "<string>",
    "locale": "<string>",
    "multilingual_enabled": True,
    "multilingual_languages": ["<string>"],
    "text": "<string>",
    "instructions": "<string>",
    "interruptible": True,
    "ai_disclosure_text": "<string>",
    "agent_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "team_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "persona_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
}
headers = {
    "x-api-key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'x-api-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    voice_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    voice_tuning: {},
    stt_provider: '<string>',
    stt_model: '<string>',
    stt_provider_data: {},
    tts_speed: 5,
    tts_provider_data: {model: '<string>', expressive_speech: false},
    vad_provider_data: {},
    local_vad_params: {confidence: 0.7, start_secs: 0.2, stop_secs: 0.5, min_volume: 0.6},
    turn_analyzer_params: {stop_secs: 2, pre_speech_ms: 500, max_duration_secs: 8},
    pronunciation_overrides: {},
    noise_cancellation_enabled: true,
    language: '<string>',
    locale: '<string>',
    multilingual_enabled: true,
    multilingual_languages: ['<string>'],
    text: '<string>',
    instructions: '<string>',
    interruptible: true,
    ai_disclosure_text: '<string>',
    agent_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    team_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    persona_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a'
  })
};

fetch('https://api-sandbox.featherhq.com/v1/voice/configs', 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-sandbox.featherhq.com/v1/voice/configs",
  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([
    'voice_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'voice_tuning' => [
        
    ],
    'stt_provider' => '<string>',
    'stt_model' => '<string>',
    'stt_provider_data' => [
        
    ],
    'tts_speed' => 5,
    'tts_provider_data' => [
        'model' => '<string>',
        'expressive_speech' => false
    ],
    'vad_provider_data' => [
        
    ],
    'local_vad_params' => [
        'confidence' => 0.7,
        'start_secs' => 0.2,
        'stop_secs' => 0.5,
        'min_volume' => 0.6
    ],
    'turn_analyzer_params' => [
        'stop_secs' => 2,
        'pre_speech_ms' => 500,
        'max_duration_secs' => 8
    ],
    'pronunciation_overrides' => [
        
    ],
    'noise_cancellation_enabled' => true,
    'language' => '<string>',
    'locale' => '<string>',
    'multilingual_enabled' => true,
    'multilingual_languages' => [
        '<string>'
    ],
    'text' => '<string>',
    'instructions' => '<string>',
    'interruptible' => true,
    'ai_disclosure_text' => '<string>',
    'agent_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'team_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'persona_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "x-api-key: <api-key>"
  ],
]);

$response = curl_exec($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-sandbox.featherhq.com/v1/voice/configs"

	payload := strings.NewReader("{\n  \"voice_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"voice_tuning\": {},\n  \"stt_provider\": \"<string>\",\n  \"stt_model\": \"<string>\",\n  \"stt_provider_data\": {},\n  \"tts_speed\": 5,\n  \"tts_provider_data\": {\n    \"model\": \"<string>\",\n    \"expressive_speech\": false\n  },\n  \"vad_provider_data\": {},\n  \"local_vad_params\": {\n    \"confidence\": 0.7,\n    \"start_secs\": 0.2,\n    \"stop_secs\": 0.5,\n    \"min_volume\": 0.6\n  },\n  \"turn_analyzer_params\": {\n    \"stop_secs\": 2,\n    \"pre_speech_ms\": 500,\n    \"max_duration_secs\": 8\n  },\n  \"pronunciation_overrides\": {},\n  \"noise_cancellation_enabled\": true,\n  \"language\": \"<string>\",\n  \"locale\": \"<string>\",\n  \"multilingual_enabled\": true,\n  \"multilingual_languages\": [\n    \"<string>\"\n  ],\n  \"text\": \"<string>\",\n  \"instructions\": \"<string>\",\n  \"interruptible\": true,\n  \"ai_disclosure_text\": \"<string>\",\n  \"agent_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"team_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"persona_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\"\n}")

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

	req.Header.Add("x-api-key", "<api-key>")
	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-sandbox.featherhq.com/v1/voice/configs")
  .header("x-api-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"voice_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"voice_tuning\": {},\n  \"stt_provider\": \"<string>\",\n  \"stt_model\": \"<string>\",\n  \"stt_provider_data\": {},\n  \"tts_speed\": 5,\n  \"tts_provider_data\": {\n    \"model\": \"<string>\",\n    \"expressive_speech\": false\n  },\n  \"vad_provider_data\": {},\n  \"local_vad_params\": {\n    \"confidence\": 0.7,\n    \"start_secs\": 0.2,\n    \"stop_secs\": 0.5,\n    \"min_volume\": 0.6\n  },\n  \"turn_analyzer_params\": {\n    \"stop_secs\": 2,\n    \"pre_speech_ms\": 500,\n    \"max_duration_secs\": 8\n  },\n  \"pronunciation_overrides\": {},\n  \"noise_cancellation_enabled\": true,\n  \"language\": \"<string>\",\n  \"locale\": \"<string>\",\n  \"multilingual_enabled\": true,\n  \"multilingual_languages\": [\n    \"<string>\"\n  ],\n  \"text\": \"<string>\",\n  \"instructions\": \"<string>\",\n  \"interruptible\": true,\n  \"ai_disclosure_text\": \"<string>\",\n  \"agent_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"team_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"persona_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api-sandbox.featherhq.com/v1/voice/configs")

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

request = Net::HTTP::Post.new(url)
request["x-api-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"voice_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"voice_tuning\": {},\n  \"stt_provider\": \"<string>\",\n  \"stt_model\": \"<string>\",\n  \"stt_provider_data\": {},\n  \"tts_speed\": 5,\n  \"tts_provider_data\": {\n    \"model\": \"<string>\",\n    \"expressive_speech\": false\n  },\n  \"vad_provider_data\": {},\n  \"local_vad_params\": {\n    \"confidence\": 0.7,\n    \"start_secs\": 0.2,\n    \"stop_secs\": 0.5,\n    \"min_volume\": 0.6\n  },\n  \"turn_analyzer_params\": {\n    \"stop_secs\": 2,\n    \"pre_speech_ms\": 500,\n    \"max_duration_secs\": 8\n  },\n  \"pronunciation_overrides\": {},\n  \"noise_cancellation_enabled\": true,\n  \"language\": \"<string>\",\n  \"locale\": \"<string>\",\n  \"multilingual_enabled\": true,\n  \"multilingual_languages\": [\n    \"<string>\"\n  ],\n  \"text\": \"<string>\",\n  \"instructions\": \"<string>\",\n  \"interruptible\": true,\n  \"ai_disclosure_text\": \"<string>\",\n  \"agent_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"team_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"persona_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\"\n}"

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

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "voice_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "voice": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "provider": "elevenlabs",
    "external_id": "<string>",
    "name": "<string>",
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z",
    "description": "<string>",
    "preview_url": "<string>",
    "language": "<string>",
    "accent": "<string>",
    "category": "<string>",
    "labels": {},
    "supported_models": [
      "<string>"
    ],
    "is_active": true
  },
  "stt_provider": "<string>",
  "stt_language": "<string>",
  "vad_provider": "<string>",
  "interruption_sensitivity": 123,
  "min_endpoint_delay_ms": 123,
  "max_endpoint_delay_ms": 123,
  "preemptive_generation_enabled": true,
  "noise_cancellation_enabled": true,
  "noise_cancellation_provider": "rnnoise",
  "normalize_for_speech": true,
  "audio_in_sample_rate": 123,
  "audio_out_sample_rate": 123,
  "metrics_enabled": true,
  "usage_metrics_enabled": true,
  "language": "<string>",
  "multilingual_enabled": true,
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z",
  "organization_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "name": "<string>",
  "agent_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "team_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "persona_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "voice_tuning": {},
  "stt_model": "<string>",
  "stt_provider_data": {},
  "tts_speed": 123,
  "tts_provider_data": {},
  "vad_provider_data": {},
  "local_vad_params": {},
  "turn_analyzer_params": {},
  "hard_turn_timeout_ms": 123,
  "end_call_phrases": [
    "<string>"
  ],
  "pronunciation_overrides": {},
  "heartbeats_period_secs": 123,
  "idle_pipeline_timeout_ms": 123,
  "locale": "<string>",
  "multilingual_languages": [
    "<string>"
  ],
  "linked_agent_count": 0,
  "linked_agent_names": [
    "<string>"
  ],
  "linked_team_count": 0,
  "linked_team_names": [
    "<string>"
  ],
  "metadata_": {},
  "first_speaking_config": {
    "first_speaker": "agent",
    "mode": "static",
    "text": "<string>",
    "instructions": "<string>",
    "interruptible": true,
    "ai_disclosure_text": "<string>"
  },
  "warnings": [
    "<string>"
  ],
  "effective_stt_model": "<string>",
  "effective_stt_provider_data": {},
  "effective_tts_model": "<string>"
}

{
  "error": "<string>",
  "message": "<string>",
  "retryable": true,
  "retry_after": 123
}

{
  "error": "<string>",
  "message": "<string>",
  "retryable": true,
  "retry_after": 123
}

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>",
      "input": "<unknown>",
      "ctx": {}
    }
  ]
}

Authorizations

x-api-key

string

header

required

Body

application/json

voice_id

string<uuid>

required

voice_tuning

Voice Tuning · object | null

stt_provider

string | null

Maximum string length: 32

stt_model

string | null

Maximum string length: 64

stt_provider_data

Stt Provider Data · object | null

tts_speed

number | null

Required range: 0 <= x < 10

tts_provider_data

VoiceTTSProviderDataInput · object | null

OpenAPI-visible TTS overrides accepted by voice-config CRUD.

The linked voice_id remains the authority for which provider member is valid. The service resolves that row and validates this payload again against the provider-specific discriminated union, including model support and the Inworld TTS-2-only expressive-speech constraint.

Show child attributes

vad_provider_data

Vad Provider Data · object | null

local_vad_params

LocalVADParams · object | null

Silero VAD tuning. Always applied for Deepgram Nova; ignored otherwise.

Show child attributes

turn_analyzer_params

TurnAnalyzerParams · object | null

Smart-turn-v3 tuning. Always applied for Deepgram Nova; ignored otherwise.

Show child attributes

pronunciation_overrides

Pronunciation Overrides · object | null

Show child attributes

noise_cancellation_enabled

boolean | null

noise_cancellation_provider

enum<string> | null

Noise-suppression engine wired by audio_filters.build_audio_in_filter.

Applies only when noise_cancellation_enabled. String values MUST match the provider strings the factory dispatches on.

Available options:

rnnoise,

dtln

language

string | null

Maximum string length: 16

locale

string | null

Maximum string length: 16

multilingual_enabled

boolean | null

multilingual_languages

string[] | null

Maximum array length: 50

first_speaker

enum<string> | null

Available options:

agent,

user

mode

enum<string> | null

Available options:

static,

dynamic

text

string | null

Maximum string length: 1000

instructions

string | null

Maximum string length: 2000

interruptible

boolean | null

ai_disclosure_text

string | null

Maximum string length: 500

agent_id

string<uuid> | null

team_id

string<uuid> | null

persona_id

string<uuid> | null

Response

Successful Response

string<uuid>

required

voice_id

string<uuid>

required

voice

VoiceOut · object

required

Show child attributes

stt_provider

string

required

stt_language

string

required

vad_provider

string

required

interruption_sensitivity

number

required

min_endpoint_delay_ms

integer

required

max_endpoint_delay_ms

integer

required

preemptive_generation_enabled

boolean

required

noise_cancellation_enabled

boolean

required

noise_cancellation_provider

enum<string>

required

Noise-suppression engine wired by audio_filters.build_audio_in_filter.

Applies only when noise_cancellation_enabled. String values MUST match the provider strings the factory dispatches on.

Available options:

rnnoise,

dtln

normalize_for_speech

boolean

required

audio_in_sample_rate

integer

required

audio_out_sample_rate

integer

required

metrics_enabled

boolean

required

usage_metrics_enabled

boolean

required

language

string

required

multilingual_enabled

boolean

required

created_at

string<date-time>

required

updated_at

string<date-time>

required

organization_id

string<uuid> | null

name

string | null

agent_id

string<uuid> | null

team_id

string<uuid> | null

persona_id

string<uuid> | null

voice_tuning

Voice Tuning · object

stt_model

string | null

stt_provider_data

Stt Provider Data · object

tts_speed

number | null

tts_provider_data

Tts Provider Data · object

vad_provider_data

Vad Provider Data · object

local_vad_params

Local Vad Params · object

turn_analyzer_params

Turn Analyzer Params · object

hard_turn_timeout_ms

integer | null

end_call_phrases

string[]

pronunciation_overrides

Pronunciation Overrides · object

Show child attributes

heartbeats_period_secs

integer | null

idle_pipeline_timeout_ms

integer | null

locale

string | null

multilingual_languages

string[]

linked_agent_count

integer

default:0

linked_agent_names

string[]

linked_team_count

integer

default:0

linked_team_names

string[]

metadata_

Metadata · object

first_speaking_config

FirstSpeakingConfig · object | null

Config for the AI's opening turn (no user input yet).

Lives inside ChannelConfig — first-speaking is per-channel.

Mode-agnostic fields:

first_speaker: "agent" opens the call with the rendered message; "user" skips the greeting (caller speaks first). Non-voice channels treat the inbound user message as the "user" opener and ignore this field at runtime.

Greeting source (only applies when first_speaker="agent"):

static mode: text is required and emitted verbatim (templated via the shared {{var}} engine, src.shared.templating.render).
dynamic mode: instructions are sent to the model router with the agent persona to render an opening line (instructions are templated). When omitted/empty, instructions falls back to DEFAULT_DYNAMIC_FIRST_SPEAKING_INSTRUCTIONS so operators who just want a generic friendly opener don't have to author copy.

Voice-only fields (ignored on non-audio channels):

interruptible: whether the caller can barge in mid-greeting.
ai_disclosure_text: regulatory disclosure (e.g. CA SB 1001), played as an uninterruptible TTS frame BEFORE the greeting. Disclosure plays even when first_speaker="user" because the regulation requires the disclosure regardless of who speaks first.

Show child attributes

warnings

string[]

effective_stt_model

string | null

effective_stt_provider_data

Effective Stt Provider Data · object | null

effective_tts_model

string | null

Create a voice pipeline config for an agent or persona (1:1)

curl --request POST \
  --url https://api-sandbox.featherhq.com/v1/voice/configs \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "voice_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "voice_tuning": {},
  "stt_provider": "<string>",
  "stt_model": "<string>",
  "stt_provider_data": {},
  "tts_speed": 5,
  "tts_provider_data": {
    "model": "<string>",
    "expressive_speech": false
  },
  "vad_provider_data": {},
  "local_vad_params": {
    "confidence": 0.7,
    "start_secs": 0.2,
    "stop_secs": 0.5,
    "min_volume": 0.6
  },
  "turn_analyzer_params": {
    "stop_secs": 2,
    "pre_speech_ms": 500,
    "max_duration_secs": 8
  },
  "pronunciation_overrides": {},
  "noise_cancellation_enabled": true,
  "language": "<string>",
  "locale": "<string>",
  "multilingual_enabled": true,
  "multilingual_languages": [
    "<string>"
  ],
  "text": "<string>",
  "instructions": "<string>",
  "interruptible": true,
  "ai_disclosure_text": "<string>",
  "agent_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "team_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "persona_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
}
'

import requests

url = "https://api-sandbox.featherhq.com/v1/voice/configs"

payload = {
    "voice_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "voice_tuning": {},
    "stt_provider": "<string>",
    "stt_model": "<string>",
    "stt_provider_data": {},
    "tts_speed": 5,
    "tts_provider_data": {
        "model": "<string>",
        "expressive_speech": False
    },
    "vad_provider_data": {},
    "local_vad_params": {
        "confidence": 0.7,
        "start_secs": 0.2,
        "stop_secs": 0.5,
        "min_volume": 0.6
    },
    "turn_analyzer_params": {
        "stop_secs": 2,
        "pre_speech_ms": 500,
        "max_duration_secs": 8
    },
    "pronunciation_overrides": {},
    "noise_cancellation_enabled": True,
    "language": "<string>",
    "locale": "<string>",
    "multilingual_enabled": True,
    "multilingual_languages": ["<string>"],
    "text": "<string>",
    "instructions": "<string>",
    "interruptible": True,
    "ai_disclosure_text": "<string>",
    "agent_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "team_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "persona_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
}
headers = {
    "x-api-key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'x-api-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    voice_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    voice_tuning: {},
    stt_provider: '<string>',
    stt_model: '<string>',
    stt_provider_data: {},
    tts_speed: 5,
    tts_provider_data: {model: '<string>', expressive_speech: false},
    vad_provider_data: {},
    local_vad_params: {confidence: 0.7, start_secs: 0.2, stop_secs: 0.5, min_volume: 0.6},
    turn_analyzer_params: {stop_secs: 2, pre_speech_ms: 500, max_duration_secs: 8},
    pronunciation_overrides: {},
    noise_cancellation_enabled: true,
    language: '<string>',
    locale: '<string>',
    multilingual_enabled: true,
    multilingual_languages: ['<string>'],
    text: '<string>',
    instructions: '<string>',
    interruptible: true,
    ai_disclosure_text: '<string>',
    agent_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    team_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    persona_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a'
  })
};

fetch('https://api-sandbox.featherhq.com/v1/voice/configs', 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-sandbox.featherhq.com/v1/voice/configs",
  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([
    'voice_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'voice_tuning' => [
        
    ],
    'stt_provider' => '<string>',
    'stt_model' => '<string>',
    'stt_provider_data' => [
        
    ],
    'tts_speed' => 5,
    'tts_provider_data' => [
        'model' => '<string>',
        'expressive_speech' => false
    ],
    'vad_provider_data' => [
        
    ],
    'local_vad_params' => [
        'confidence' => 0.7,
        'start_secs' => 0.2,
        'stop_secs' => 0.5,
        'min_volume' => 0.6
    ],
    'turn_analyzer_params' => [
        'stop_secs' => 2,
        'pre_speech_ms' => 500,
        'max_duration_secs' => 8
    ],
    'pronunciation_overrides' => [
        
    ],
    'noise_cancellation_enabled' => true,
    'language' => '<string>',
    'locale' => '<string>',
    'multilingual_enabled' => true,
    'multilingual_languages' => [
        '<string>'
    ],
    'text' => '<string>',
    'instructions' => '<string>',
    'interruptible' => true,
    'ai_disclosure_text' => '<string>',
    'agent_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'team_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'persona_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "x-api-key: <api-key>"
  ],
]);

$response = curl_exec($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-sandbox.featherhq.com/v1/voice/configs"

	payload := strings.NewReader("{\n  \"voice_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"voice_tuning\": {},\n  \"stt_provider\": \"<string>\",\n  \"stt_model\": \"<string>\",\n  \"stt_provider_data\": {},\n  \"tts_speed\": 5,\n  \"tts_provider_data\": {\n    \"model\": \"<string>\",\n    \"expressive_speech\": false\n  },\n  \"vad_provider_data\": {},\n  \"local_vad_params\": {\n    \"confidence\": 0.7,\n    \"start_secs\": 0.2,\n    \"stop_secs\": 0.5,\n    \"min_volume\": 0.6\n  },\n  \"turn_analyzer_params\": {\n    \"stop_secs\": 2,\n    \"pre_speech_ms\": 500,\n    \"max_duration_secs\": 8\n  },\n  \"pronunciation_overrides\": {},\n  \"noise_cancellation_enabled\": true,\n  \"language\": \"<string>\",\n  \"locale\": \"<string>\",\n  \"multilingual_enabled\": true,\n  \"multilingual_languages\": [\n    \"<string>\"\n  ],\n  \"text\": \"<string>\",\n  \"instructions\": \"<string>\",\n  \"interruptible\": true,\n  \"ai_disclosure_text\": \"<string>\",\n  \"agent_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"team_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"persona_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\"\n}")

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

	req.Header.Add("x-api-key", "<api-key>")
	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-sandbox.featherhq.com/v1/voice/configs")
  .header("x-api-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"voice_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"voice_tuning\": {},\n  \"stt_provider\": \"<string>\",\n  \"stt_model\": \"<string>\",\n  \"stt_provider_data\": {},\n  \"tts_speed\": 5,\n  \"tts_provider_data\": {\n    \"model\": \"<string>\",\n    \"expressive_speech\": false\n  },\n  \"vad_provider_data\": {},\n  \"local_vad_params\": {\n    \"confidence\": 0.7,\n    \"start_secs\": 0.2,\n    \"stop_secs\": 0.5,\n    \"min_volume\": 0.6\n  },\n  \"turn_analyzer_params\": {\n    \"stop_secs\": 2,\n    \"pre_speech_ms\": 500,\n    \"max_duration_secs\": 8\n  },\n  \"pronunciation_overrides\": {},\n  \"noise_cancellation_enabled\": true,\n  \"language\": \"<string>\",\n  \"locale\": \"<string>\",\n  \"multilingual_enabled\": true,\n  \"multilingual_languages\": [\n    \"<string>\"\n  ],\n  \"text\": \"<string>\",\n  \"instructions\": \"<string>\",\n  \"interruptible\": true,\n  \"ai_disclosure_text\": \"<string>\",\n  \"agent_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"team_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"persona_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api-sandbox.featherhq.com/v1/voice/configs")

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

request = Net::HTTP::Post.new(url)
request["x-api-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"voice_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"voice_tuning\": {},\n  \"stt_provider\": \"<string>\",\n  \"stt_model\": \"<string>\",\n  \"stt_provider_data\": {},\n  \"tts_speed\": 5,\n  \"tts_provider_data\": {\n    \"model\": \"<string>\",\n    \"expressive_speech\": false\n  },\n  \"vad_provider_data\": {},\n  \"local_vad_params\": {\n    \"confidence\": 0.7,\n    \"start_secs\": 0.2,\n    \"stop_secs\": 0.5,\n    \"min_volume\": 0.6\n  },\n  \"turn_analyzer_params\": {\n    \"stop_secs\": 2,\n    \"pre_speech_ms\": 500,\n    \"max_duration_secs\": 8\n  },\n  \"pronunciation_overrides\": {},\n  \"noise_cancellation_enabled\": true,\n  \"language\": \"<string>\",\n  \"locale\": \"<string>\",\n  \"multilingual_enabled\": true,\n  \"multilingual_languages\": [\n    \"<string>\"\n  ],\n  \"text\": \"<string>\",\n  \"instructions\": \"<string>\",\n  \"interruptible\": true,\n  \"ai_disclosure_text\": \"<string>\",\n  \"agent_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"team_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"persona_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\"\n}"

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

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "voice_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "voice": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "provider": "elevenlabs",
    "external_id": "<string>",
    "name": "<string>",
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z",
    "description": "<string>",
    "preview_url": "<string>",
    "language": "<string>",
    "accent": "<string>",
    "category": "<string>",
    "labels": {},
    "supported_models": [
      "<string>"
    ],
    "is_active": true
  },
  "stt_provider": "<string>",
  "stt_language": "<string>",
  "vad_provider": "<string>",
  "interruption_sensitivity": 123,
  "min_endpoint_delay_ms": 123,
  "max_endpoint_delay_ms": 123,
  "preemptive_generation_enabled": true,
  "noise_cancellation_enabled": true,
  "noise_cancellation_provider": "rnnoise",
  "normalize_for_speech": true,
  "audio_in_sample_rate": 123,
  "audio_out_sample_rate": 123,
  "metrics_enabled": true,
  "usage_metrics_enabled": true,
  "language": "<string>",
  "multilingual_enabled": true,
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z",
  "organization_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "name": "<string>",
  "agent_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "team_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "persona_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "voice_tuning": {},
  "stt_model": "<string>",
  "stt_provider_data": {},
  "tts_speed": 123,
  "tts_provider_data": {},
  "vad_provider_data": {},
  "local_vad_params": {},
  "turn_analyzer_params": {},
  "hard_turn_timeout_ms": 123,
  "end_call_phrases": [
    "<string>"
  ],
  "pronunciation_overrides": {},
  "heartbeats_period_secs": 123,
  "idle_pipeline_timeout_ms": 123,
  "locale": "<string>",
  "multilingual_languages": [
    "<string>"
  ],
  "linked_agent_count": 0,
  "linked_agent_names": [
    "<string>"
  ],
  "linked_team_count": 0,
  "linked_team_names": [
    "<string>"
  ],
  "metadata_": {},
  "first_speaking_config": {
    "first_speaker": "agent",
    "mode": "static",
    "text": "<string>",
    "instructions": "<string>",
    "interruptible": true,
    "ai_disclosure_text": "<string>"
  },
  "warnings": [
    "<string>"
  ],
  "effective_stt_model": "<string>",
  "effective_stt_provider_data": {},
  "effective_tts_model": "<string>"
}

{
  "error": "<string>",
  "message": "<string>",
  "retryable": true,
  "retry_after": 123
}

{
  "error": "<string>",
  "message": "<string>",
  "retryable": true,
  "retry_after": 123
}

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>",
      "input": "<unknown>",
      "ctx": {}
    }
  ]
}