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POST
/
audio
/
speech
Generate speech
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    model: '<string>',
    input: '<string>',
    voice: '<string>',
    provider: {
      order: ['<string>'],
      only: ['<string>'],
      ignore: ['<string>'],
      include_alpha: true,
      allow_fallbacks: true,
      require_parameters: true,
      required_execution_region: '<string>',
      required_data_region: '<string>',
      require_zero_data_retention: true,
      zdr: true,
      enforce_distillable_text: true,
      quantizations: ['<string>'],
      sort: '<string>',
      max_price: {prompt: 123, completion: 123, image: 123, audio: 123, request: 123},
      preferred_min_throughput: 123,
      preferred_max_latency: 123
    }
  })
};

fetch('https://api.phaseo.ai/v1/audio/speech', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));
import requests

url = "https://api.phaseo.ai/v1/audio/speech"

payload = {
"model": "<string>",
"input": "<string>",
"voice": "<string>",
"provider": {
"order": ["<string>"],
"only": ["<string>"],
"ignore": ["<string>"],
"include_alpha": True,
"allow_fallbacks": True,
"require_parameters": True,
"required_execution_region": "<string>",
"required_data_region": "<string>",
"require_zero_data_retention": True,
"zdr": True,
"enforce_distillable_text": True,
"quantizations": ["<string>"],
"sort": "<string>",
"max_price": {
"prompt": 123,
"completion": 123,
"image": 123,
"audio": 123,
"request": 123
},
"preferred_min_throughput": 123,
"preferred_max_latency": 123
}
}
headers = {
"Authorization": "Bearer <token>",
"Content-Type": "application/json"
}

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

print(response.text)
curl --request POST \
--url https://api.phaseo.ai/v1/audio/speech \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"model": "<string>",
"input": "<string>",
"voice": "<string>",
"provider": {
"order": [
"<string>"
],
"only": [
"<string>"
],
"ignore": [
"<string>"
],
"include_alpha": true,
"allow_fallbacks": true,
"require_parameters": true,
"required_execution_region": "<string>",
"required_data_region": "<string>",
"require_zero_data_retention": true,
"zdr": true,
"enforce_distillable_text": true,
"quantizations": [
"<string>"
],
"sort": "<string>",
"max_price": {
"prompt": 123,
"completion": 123,
"image": 123,
"audio": 123,
"request": 123
},
"preferred_min_throughput": 123,
"preferred_max_latency": 123
}
}
'
package main

import (
"fmt"
"strings"
"net/http"
"io"
)

func main() {

url := "https://api.phaseo.ai/v1/audio/speech"

payload := strings.NewReader("{\n \"model\": \"<string>\",\n \"input\": \"<string>\",\n \"voice\": \"<string>\",\n \"provider\": {\n \"order\": [\n \"<string>\"\n ],\n \"only\": [\n \"<string>\"\n ],\n \"ignore\": [\n \"<string>\"\n ],\n \"include_alpha\": true,\n \"allow_fallbacks\": true,\n \"require_parameters\": true,\n \"required_execution_region\": \"<string>\",\n \"required_data_region\": \"<string>\",\n \"require_zero_data_retention\": true,\n \"zdr\": true,\n \"enforce_distillable_text\": true,\n \"quantizations\": [\n \"<string>\"\n ],\n \"sort\": \"<string>\",\n \"max_price\": {\n \"prompt\": 123,\n \"completion\": 123,\n \"image\": 123,\n \"audio\": 123,\n \"request\": 123\n },\n \"preferred_min_throughput\": 123,\n \"preferred_max_latency\": 123\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.phaseo.ai/v1/audio/speech")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"model\": \"<string>\",\n \"input\": \"<string>\",\n \"voice\": \"<string>\",\n \"provider\": {\n \"order\": [\n \"<string>\"\n ],\n \"only\": [\n \"<string>\"\n ],\n \"ignore\": [\n \"<string>\"\n ],\n \"include_alpha\": true,\n \"allow_fallbacks\": true,\n \"require_parameters\": true,\n \"required_execution_region\": \"<string>\",\n \"required_data_region\": \"<string>\",\n \"require_zero_data_retention\": true,\n \"zdr\": true,\n \"enforce_distillable_text\": true,\n \"quantizations\": [\n \"<string>\"\n ],\n \"sort\": \"<string>\",\n \"max_price\": {\n \"prompt\": 123,\n \"completion\": 123,\n \"image\": 123,\n \"audio\": 123,\n \"request\": 123\n },\n \"preferred_min_throughput\": 123,\n \"preferred_max_latency\": 123\n }\n}")
.asString();
<?php

$curl = curl_init();

curl_setopt_array($curl, [
CURLOPT_URL => "https://api.phaseo.ai/v1/audio/speech",
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' => '<string>',
'input' => '<string>',
'voice' => '<string>',
'provider' => [
'order' => [
'<string>'
],
'only' => [
'<string>'
],
'ignore' => [
'<string>'
],
'include_alpha' => true,
'allow_fallbacks' => true,
'require_parameters' => true,
'required_execution_region' => '<string>',
'required_data_region' => '<string>',
'require_zero_data_retention' => true,
'zdr' => true,
'enforce_distillable_text' => true,
'quantizations' => [
'<string>'
],
'sort' => '<string>',
'max_price' => [
'prompt' => 123,
'completion' => 123,
'image' => 123,
'audio' => 123,
'request' => 123
],
'preferred_min_throughput' => 123,
'preferred_max_latency' => 123
]
]),
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;
}
require 'uri'
require 'net/http'

url = URI("https://api.phaseo.ai/v1/audio/speech")

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\": \"<string>\",\n \"input\": \"<string>\",\n \"voice\": \"<string>\",\n \"provider\": {\n \"order\": [\n \"<string>\"\n ],\n \"only\": [\n \"<string>\"\n ],\n \"ignore\": [\n \"<string>\"\n ],\n \"include_alpha\": true,\n \"allow_fallbacks\": true,\n \"require_parameters\": true,\n \"required_execution_region\": \"<string>\",\n \"required_data_region\": \"<string>\",\n \"require_zero_data_retention\": true,\n \"zdr\": true,\n \"enforce_distillable_text\": true,\n \"quantizations\": [\n \"<string>\"\n ],\n \"sort\": \"<string>\",\n \"max_price\": {\n \"prompt\": 123,\n \"completion\": 123,\n \"image\": 123,\n \"audio\": 123,\n \"request\": 123\n },\n \"preferred_min_throughput\": 123,\n \"preferred_max_latency\": 123\n }\n}"

response = http.request(request)
puts response.read_body
"<string>"

Voice Mapping

voice is normalized by provider with an internal alias map:
  • openai: common voices (for example alloy, ash, ballad, coral, echo, fable, onyx, nova, sage, shimmer, verse, cedar, marin).
  • google (AI Studio / Gemini TTS): canonical prebuilt voices: Zephyr, Puck, Charon, Kore, Fenrir, Leda, Orus, Aoede, Callirrhoe, Autonoe, Enceladus, Iapetus, Umbriel, Algieba, Despina, Erinome, Algenib, Rasalgethi, Laomedeia, Achernar, Alnilam, Schedar, Gacrux, Pulcherrima, Achird, Zubenelgenubi, Vindemiatrix, Sadachbia, Sadaltager, Sulafat.
  • elevenlabs: common public starter voices are mapped (for example rachel, domi, bella, antoni, elli, josh, arnold, adam, sam).
If a provided voice is not valid for the routed provider/model mapping, the request returns 400 invalid_request_error with param: "voice".

Provider Overrides

You can still pass provider-native voice settings:
  • ElevenLabs: config.elevenlabs.voice_id / config.elevenlabs.voice / config.elevenlabs.voiceName
  • Google: config.google.voice_name / config.google.voiceName
Top-level voice should be your default for portability.

Voice Samples

Authorizations

Authorization
string
header
required

Bearer token authentication

Body

application/json
model
string
required
input
string
required
voice
string
format
enum<string>
Available options:
mp3,
wav,
ogg,
aac
provider
object

Provider routing preferences for gateway selection.

Response

200 - audio/mpeg

Audio file

The response is of type file.

Last modified on April 21, 2026