cURL

curl --request POST \
  --url 'https://api.typecast.ai/v1/voices/clone' \
  --header 'X-API-KEY: <api-key>' \
  -F 'file=@sample.wav' \
  -F 'name=my-voice' \
  -F 'model=ssfm-v30'

import requests

with open("sample.wav", "rb") as f:
    response = requests.post(
        "https://api.typecast.ai/v1/voices/clone",
        headers={"X-API-KEY": "<api-key>"},
        files={"file": ("sample.wav", f, "audio/wav")},
        data={"name": "my-voice", "model": "ssfm-v30"},
    )

print(response.json())
# {"voice_id": "uc_64a1b2c3d4e5f6a7b8c9d0e1", "name": "my-voice", "model": "ssfm-v30"}

const form = new FormData();
form.append('file', '<string>');
form.append('name', '<string>');

const options = {method: 'POST', headers: {'X-API-KEY': '<api-key>'}};

options.body = form;

fetch('https://api.typecast.ai/v1/voices/clone', 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.typecast.ai/v1/voices/clone",
  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=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"name\"\r\n\r\n<string>\r\n-----011000010111000001101001--",
  CURLOPT_HTTPHEADER => [
    "Content-Type: multipart/form-data; boundary=---011000010111000001101001",
    "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.typecast.ai/v1/voices/clone"

	payload := strings.NewReader("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"name\"\r\n\r\n<string>\r\n-----011000010111000001101001--")

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

	req.Header.Add("X-API-KEY", "<api-key>")
	req.Header.Add("Content-Type", "multipart/form-data; boundary=---011000010111000001101001")

	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.typecast.ai/v1/voices/clone")
  .header("X-API-KEY", "<api-key>")
  .header("Content-Type", "multipart/form-data; boundary=---011000010111000001101001")
  .body("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"name\"\r\n\r\n<string>\r\n-----011000010111000001101001--")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.typecast.ai/v1/voices/clone")

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"] = 'multipart/form-data; boundary=---011000010111000001101001'
request.body = "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"name\"\r\n\r\n<string>\r\n-----011000010111000001101001--"

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

{
  "voice_id": "uc_64a1b2c3d4e5f6a7b8c9d0e1",
  "name": "my-voice",
  "model": "ssfm-v30"
}

Voices

Instant cloning

Clone a custom voice from a short audio sample and use it like any built-in voice in subsequent text-to-speech calls.

Upload a WAV or MP3 file (max 25 MB). The server extracts a speaker embedding and returns a custom voice ID with the uc_ prefix that can be passed directly to POST /v1/text-to-speech (and any other endpoint that accepts a voice_id). The original audio is uploaded to S3 in the background after the response is returned.

Limits

Audio file: max 25 MB. Supported formats: WAV, MP3.
Audio duration: 5 to 150 seconds.
Voice name: 1-30 characters.
Model: ssfm-v21 or ssfm-v30. The cloned voice is bound to this engine model.
Each plan has a maximum number of active custom voices (the custom_voice_slot). Use DELETE /v1/voices/{voice_id} to free a slot.

Typical flow

POST /v1/voices/clone with the sample audio → receive voice_id (e.g. uc_64a1b2...).
POST /v1/text-to-speech with voice_id set to the cloned ID.
DELETE /v1/voices/{voice_id} when you no longer need the voice.

POST

voices

clone

cURL

curl --request POST \
  --url 'https://api.typecast.ai/v1/voices/clone' \
  --header 'X-API-KEY: <api-key>' \
  -F 'file=@sample.wav' \
  -F 'name=my-voice' \
  -F 'model=ssfm-v30'

import requests

with open("sample.wav", "rb") as f:
    response = requests.post(
        "https://api.typecast.ai/v1/voices/clone",
        headers={"X-API-KEY": "<api-key>"},
        files={"file": ("sample.wav", f, "audio/wav")},
        data={"name": "my-voice", "model": "ssfm-v30"},
    )

print(response.json())
# {"voice_id": "uc_64a1b2c3d4e5f6a7b8c9d0e1", "name": "my-voice", "model": "ssfm-v30"}

const form = new FormData();
form.append('file', '<string>');
form.append('name', '<string>');

const options = {method: 'POST', headers: {'X-API-KEY': '<api-key>'}};

options.body = form;

fetch('https://api.typecast.ai/v1/voices/clone', 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.typecast.ai/v1/voices/clone",
  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=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"name\"\r\n\r\n<string>\r\n-----011000010111000001101001--",
  CURLOPT_HTTPHEADER => [
    "Content-Type: multipart/form-data; boundary=---011000010111000001101001",
    "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.typecast.ai/v1/voices/clone"

	payload := strings.NewReader("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"name\"\r\n\r\n<string>\r\n-----011000010111000001101001--")

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

	req.Header.Add("X-API-KEY", "<api-key>")
	req.Header.Add("Content-Type", "multipart/form-data; boundary=---011000010111000001101001")

	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.typecast.ai/v1/voices/clone")
  .header("X-API-KEY", "<api-key>")
  .header("Content-Type", "multipart/form-data; boundary=---011000010111000001101001")
  .body("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"name\"\r\n\r\n<string>\r\n-----011000010111000001101001--")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.typecast.ai/v1/voices/clone")

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"] = 'multipart/form-data; boundary=---011000010111000001101001'
request.body = "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"name\"\r\n\r\n<string>\r\n-----011000010111000001101001--"

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

{
  "voice_id": "uc_64a1b2c3d4e5f6a7b8c9d0e1",
  "name": "my-voice",
  "model": "ssfm-v30"
}

Authorizations

X-API-KEY

string

header

required

API key for authentication. You can obtain an API key from the Typecast API Console.

Body

multipart/form-data

Multipart request body for instant cloning.

file

required

Audio sample. WAV or MP3, max 25 MB, 5-150 seconds.

name

string

required

Voice name (1-30 characters).

Required string length: 1 - 30

model

enum<string>

required

Engine model to clone the voice for.

Available options:

ssfm-v21,

ssfm-v30

Response

Successful Response - Custom voice created

Response of POST /v1/voices/clone — custom voice metadata returned by instant cloning.

voice_id

string

required

Custom voice identifier with the uc_ prefix. Use this value as voice_id in POST /v1/text-to-speech and other endpoints that accept voice_id.

Example:

"uc_64a1b2c3d4e5f6a7b8c9d0e1"

name

string

required

Human-readable voice name (1-30 characters).

model

enum<string>

required

Engine model the voice was cloned for (ssfm-v21 or ssfm-v30).

Available options:

ssfm-v30,

ssfm-v21

Streaming Text To Speech Delete Custom Voice

⌘I

Text-to-Speech

Voices

Subscription

Instant cloning

Authorizations

Body

Response