Text to Speech

curl --request POST \
  --url https://api.fish.audio/v1/tts \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'model: <model>' \
  --data '
{
  "text": "<string>",
  "temperature": 0.7,
  "top_p": 0.7,
  "references": [
    {
      "audio": "<string>",
      "text": "<string>"
    }
  ],
  "reference_id": "<string>",
  "prosody": {
    "speed": 1,
    "volume": 0
  },
  "chunk_length": 300,
  "normalize": true,
  "format": "mp3",
  "sample_rate": 123,
  "mp3_bitrate": 128,
  "opus_bitrate": -1000,
  "latency": "normal",
  "max_new_tokens": 1024,
  "repetition_penalty": 1.2,
  "min_chunk_length": 50,
  "condition_on_previous_chunks": true,
  "early_stop_threshold": 1
}
'

import requests

url = "https://api.fish.audio/v1/tts"

payload = {
    "text": "<string>",
    "temperature": 0.7,
    "top_p": 0.7,
    "references": [
        {
            "audio": "<string>",
            "text": "<string>"
        }
    ],
    "reference_id": "<string>",
    "prosody": {
        "speed": 1,
        "volume": 0
    },
    "chunk_length": 300,
    "normalize": True,
    "format": "mp3",
    "sample_rate": 123,
    "mp3_bitrate": 128,
    "opus_bitrate": -1000,
    "latency": "normal",
    "max_new_tokens": 1024,
    "repetition_penalty": 1.2,
    "min_chunk_length": 50,
    "condition_on_previous_chunks": True,
    "early_stop_threshold": 1
}
headers = {
    "model": "<model>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    model: '<model>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    text: '<string>',
    temperature: 0.7,
    top_p: 0.7,
    references: [{audio: '<string>', text: '<string>'}],
    reference_id: '<string>',
    prosody: {speed: 1, volume: 0},
    chunk_length: 300,
    normalize: true,
    format: 'mp3',
    sample_rate: 123,
    mp3_bitrate: 128,
    opus_bitrate: -1000,
    latency: 'normal',
    max_new_tokens: 1024,
    repetition_penalty: 1.2,
    min_chunk_length: 50,
    condition_on_previous_chunks: true,
    early_stop_threshold: 1
  })
};

fetch('https://api.fish.audio/v1/tts', 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.fish.audio/v1/tts",
  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([
    'text' => '<string>',
    'temperature' => 0.7,
    'top_p' => 0.7,
    'references' => [
        [
                'audio' => '<string>',
                'text' => '<string>'
        ]
    ],
    'reference_id' => '<string>',
    'prosody' => [
        'speed' => 1,
        'volume' => 0
    ],
    'chunk_length' => 300,
    'normalize' => true,
    'format' => 'mp3',
    'sample_rate' => 123,
    'mp3_bitrate' => 128,
    'opus_bitrate' => -1000,
    'latency' => 'normal',
    'max_new_tokens' => 1024,
    'repetition_penalty' => 1.2,
    'min_chunk_length' => 50,
    'condition_on_previous_chunks' => true,
    'early_stop_threshold' => 1
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json",
    "model: <model>"
  ],
]);

$response = curl_exec($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.fish.audio/v1/tts"

	payload := strings.NewReader("{\n  \"text\": \"<string>\",\n  \"temperature\": 0.7,\n  \"top_p\": 0.7,\n  \"references\": [\n    {\n      \"audio\": \"<string>\",\n      \"text\": \"<string>\"\n    }\n  ],\n  \"reference_id\": \"<string>\",\n  \"prosody\": {\n    \"speed\": 1,\n    \"volume\": 0\n  },\n  \"chunk_length\": 300,\n  \"normalize\": true,\n  \"format\": \"mp3\",\n  \"sample_rate\": 123,\n  \"mp3_bitrate\": 128,\n  \"opus_bitrate\": -1000,\n  \"latency\": \"normal\",\n  \"max_new_tokens\": 1024,\n  \"repetition_penalty\": 1.2,\n  \"min_chunk_length\": 50,\n  \"condition_on_previous_chunks\": true,\n  \"early_stop_threshold\": 1\n}")

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

	req.Header.Add("model", "<model>")
	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.fish.audio/v1/tts")
  .header("model", "<model>")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"text\": \"<string>\",\n  \"temperature\": 0.7,\n  \"top_p\": 0.7,\n  \"references\": [\n    {\n      \"audio\": \"<string>\",\n      \"text\": \"<string>\"\n    }\n  ],\n  \"reference_id\": \"<string>\",\n  \"prosody\": {\n    \"speed\": 1,\n    \"volume\": 0\n  },\n  \"chunk_length\": 300,\n  \"normalize\": true,\n  \"format\": \"mp3\",\n  \"sample_rate\": 123,\n  \"mp3_bitrate\": 128,\n  \"opus_bitrate\": -1000,\n  \"latency\": \"normal\",\n  \"max_new_tokens\": 1024,\n  \"repetition_penalty\": 1.2,\n  \"min_chunk_length\": 50,\n  \"condition_on_previous_chunks\": true,\n  \"early_stop_threshold\": 1\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.fish.audio/v1/tts")

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

request = Net::HTTP::Post.new(url)
request["model"] = '<model>'
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"text\": \"<string>\",\n  \"temperature\": 0.7,\n  \"top_p\": 0.7,\n  \"references\": [\n    {\n      \"audio\": \"<string>\",\n      \"text\": \"<string>\"\n    }\n  ],\n  \"reference_id\": \"<string>\",\n  \"prosody\": {\n    \"speed\": 1,\n    \"volume\": 0\n  },\n  \"chunk_length\": 300,\n  \"normalize\": true,\n  \"format\": \"mp3\",\n  \"sample_rate\": 123,\n  \"mp3_bitrate\": 128,\n  \"opus_bitrate\": -1000,\n  \"latency\": \"normal\",\n  \"max_new_tokens\": 1024,\n  \"repetition_penalty\": 1.2,\n  \"min_chunk_length\": 50,\n  \"condition_on_previous_chunks\": true,\n  \"early_stop_threshold\": 1\n}"

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

{
  "status": 123,
  "message": "<string>"
}

{
  "status": 123,
  "message": "<string>"
}

[
  {
    "loc": [
      "<string>"
    ],
    "type": "<string>",
    "msg": "<string>",
    "ctx": "<string>",
    "in": "path"
  }
]

POST

tts

Text to Speech

curl --request POST \
  --url https://api.fish.audio/v1/tts \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'model: <model>' \
  --data '
{
  "text": "<string>",
  "temperature": 0.7,
  "top_p": 0.7,
  "references": [
    {
      "audio": "<string>",
      "text": "<string>"
    }
  ],
  "reference_id": "<string>",
  "prosody": {
    "speed": 1,
    "volume": 0
  },
  "chunk_length": 300,
  "normalize": true,
  "format": "mp3",
  "sample_rate": 123,
  "mp3_bitrate": 128,
  "opus_bitrate": -1000,
  "latency": "normal",
  "max_new_tokens": 1024,
  "repetition_penalty": 1.2,
  "min_chunk_length": 50,
  "condition_on_previous_chunks": true,
  "early_stop_threshold": 1
}
'

import requests

url = "https://api.fish.audio/v1/tts"

payload = {
    "text": "<string>",
    "temperature": 0.7,
    "top_p": 0.7,
    "references": [
        {
            "audio": "<string>",
            "text": "<string>"
        }
    ],
    "reference_id": "<string>",
    "prosody": {
        "speed": 1,
        "volume": 0
    },
    "chunk_length": 300,
    "normalize": True,
    "format": "mp3",
    "sample_rate": 123,
    "mp3_bitrate": 128,
    "opus_bitrate": -1000,
    "latency": "normal",
    "max_new_tokens": 1024,
    "repetition_penalty": 1.2,
    "min_chunk_length": 50,
    "condition_on_previous_chunks": True,
    "early_stop_threshold": 1
}
headers = {
    "model": "<model>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    model: '<model>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    text: '<string>',
    temperature: 0.7,
    top_p: 0.7,
    references: [{audio: '<string>', text: '<string>'}],
    reference_id: '<string>',
    prosody: {speed: 1, volume: 0},
    chunk_length: 300,
    normalize: true,
    format: 'mp3',
    sample_rate: 123,
    mp3_bitrate: 128,
    opus_bitrate: -1000,
    latency: 'normal',
    max_new_tokens: 1024,
    repetition_penalty: 1.2,
    min_chunk_length: 50,
    condition_on_previous_chunks: true,
    early_stop_threshold: 1
  })
};

fetch('https://api.fish.audio/v1/tts', 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.fish.audio/v1/tts",
  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([
    'text' => '<string>',
    'temperature' => 0.7,
    'top_p' => 0.7,
    'references' => [
        [
                'audio' => '<string>',
                'text' => '<string>'
        ]
    ],
    'reference_id' => '<string>',
    'prosody' => [
        'speed' => 1,
        'volume' => 0
    ],
    'chunk_length' => 300,
    'normalize' => true,
    'format' => 'mp3',
    'sample_rate' => 123,
    'mp3_bitrate' => 128,
    'opus_bitrate' => -1000,
    'latency' => 'normal',
    'max_new_tokens' => 1024,
    'repetition_penalty' => 1.2,
    'min_chunk_length' => 50,
    'condition_on_previous_chunks' => true,
    'early_stop_threshold' => 1
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json",
    "model: <model>"
  ],
]);

$response = curl_exec($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.fish.audio/v1/tts"

	payload := strings.NewReader("{\n  \"text\": \"<string>\",\n  \"temperature\": 0.7,\n  \"top_p\": 0.7,\n  \"references\": [\n    {\n      \"audio\": \"<string>\",\n      \"text\": \"<string>\"\n    }\n  ],\n  \"reference_id\": \"<string>\",\n  \"prosody\": {\n    \"speed\": 1,\n    \"volume\": 0\n  },\n  \"chunk_length\": 300,\n  \"normalize\": true,\n  \"format\": \"mp3\",\n  \"sample_rate\": 123,\n  \"mp3_bitrate\": 128,\n  \"opus_bitrate\": -1000,\n  \"latency\": \"normal\",\n  \"max_new_tokens\": 1024,\n  \"repetition_penalty\": 1.2,\n  \"min_chunk_length\": 50,\n  \"condition_on_previous_chunks\": true,\n  \"early_stop_threshold\": 1\n}")

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

	req.Header.Add("model", "<model>")
	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.fish.audio/v1/tts")
  .header("model", "<model>")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"text\": \"<string>\",\n  \"temperature\": 0.7,\n  \"top_p\": 0.7,\n  \"references\": [\n    {\n      \"audio\": \"<string>\",\n      \"text\": \"<string>\"\n    }\n  ],\n  \"reference_id\": \"<string>\",\n  \"prosody\": {\n    \"speed\": 1,\n    \"volume\": 0\n  },\n  \"chunk_length\": 300,\n  \"normalize\": true,\n  \"format\": \"mp3\",\n  \"sample_rate\": 123,\n  \"mp3_bitrate\": 128,\n  \"opus_bitrate\": -1000,\n  \"latency\": \"normal\",\n  \"max_new_tokens\": 1024,\n  \"repetition_penalty\": 1.2,\n  \"min_chunk_length\": 50,\n  \"condition_on_previous_chunks\": true,\n  \"early_stop_threshold\": 1\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.fish.audio/v1/tts")

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

request = Net::HTTP::Post.new(url)
request["model"] = '<model>'
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"text\": \"<string>\",\n  \"temperature\": 0.7,\n  \"top_p\": 0.7,\n  \"references\": [\n    {\n      \"audio\": \"<string>\",\n      \"text\": \"<string>\"\n    }\n  ],\n  \"reference_id\": \"<string>\",\n  \"prosody\": {\n    \"speed\": 1,\n    \"volume\": 0\n  },\n  \"chunk_length\": 300,\n  \"normalize\": true,\n  \"format\": \"mp3\",\n  \"sample_rate\": 123,\n  \"mp3_bitrate\": 128,\n  \"opus_bitrate\": -1000,\n  \"latency\": \"normal\",\n  \"max_new_tokens\": 1024,\n  \"repetition_penalty\": 1.2,\n  \"min_chunk_length\": 50,\n  \"condition_on_previous_chunks\": true,\n  \"early_stop_threshold\": 1\n}"

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

{
  "status": 123,
  "message": "<string>"
}

{
  "status": 123,
  "message": "<string>"
}

[
  {
    "loc": [
      "<string>"
    ],
    "type": "<string>",
    "msg": "<string>",
    "ctx": "<string>",
    "in": "path"
  }
]

This endpoint only accepts application/json and application/msgpack.For best results, upload reference audio using the create model before using this one. This improves speech quality and reduces latency.To upload audio clips directly, without pre-uploading, serialize the request body with MessagePack as per the instructions.

Audio formats supported:

WAV / PCM
- Sample Rate: 8kHz, 16kHz, 24kHz, 32kHz, 44.1kHz
- Default Sample Rate: 44.1kHz
- 16-bit, mono
MP3
- Sample Rate: 32kHz, 44.1kHz
- Default Sample Rate: 44.1kHz
- mono
- Bitrate: 64kbps, 128kbps (default), 192kbps
Opus
- Sample Rate: 48kHz
- Default Sample Rate: 48kHz
- mono
- Bitrate: -1000 (auto), 24kbps, 32kbps (default), 48kbps, 64kbps

Authorizations

Authorization

string

header

required

Bearer authentication header of the form Bearer <token>, where <token> is your auth token.

Headers

model

enum<string>

default:s1

required

Specify which TTS model to use. We recommend s1

Available options:

s1,

speech-1.6,

speech-1.5

Body

Request body for text-to-speech synthesis.

text

string

required

Text to convert to speech.

temperature

number

default:0.7

Controls expressiveness. Higher is more varied, lower is more consistent.

Required range: 0 <= x <= 1

top_p

number

default:0.7

Controls diversity via nucleus sampling.

Required range: 0 <= x <= 1

references

ReferenceAudio · object[] | null

Inline voice references for zero-shot cloning. Requires MessagePack (not JSON). Ignored if reference_id is provided.

Show child attributes

reference_id

string | null

Voice model ID from the Fish Audio library or your custom models.

prosody

ProsodyControl · object | null

Speed and volume adjustments for the output.

Show child attributes

chunk_length

integer

default:300

Text segment size for processing.

Required range: 100 <= x <= 300

normalize

boolean

default:true

Normalizes text for English and Chinese, improving stability for numbers.

format

enum<string>

default:mp3

Output audio format.

Available options:

wav,

pcm,

mp3,

opus

sample_rate

integer | null

Audio sample rate in Hz. When null, uses the format's default (44100 Hz for most formats, 48000 Hz for opus).

mp3_bitrate

enum<integer>

default:128

MP3 bitrate in kbps. Only applies when format is mp3.

Available options:

64,

128,

192

opus_bitrate

enum<integer>

default:-1000

Opus bitrate in bps. -1000 for automatic. Only applies when format is opus.

Available options:

-1000,

24,

32,

48,

64

latency

enum<string>

default:normal

Latency-quality trade-off. normal: best quality, balanced: reduced latency, low: lowest latency.

Available options:

low,

normal,

balanced

max_new_tokens

integer

default:1024

Maximum audio tokens to generate per text chunk.

repetition_penalty

number

default:1.2

Penalty for repeating audio patterns. Values above 1.0 reduce repetition.

min_chunk_length

integer

default:50

Minimum characters before splitting into a new chunk.

Required range: 0 <= x <= 100

condition_on_previous_chunks

boolean

default:true

Use previous audio as context for voice consistency.

early_stop_threshold

number

default:1

Early stopping threshold for batch processing.

Required range: 0 <= x <= 1

Response

Request fulfilled, document follows

API Reference

REST API

Python SDK

JavaScript SDK

Go SDK

Text to Speech

Authorizations

Headers

Body

Response