Basic Text-to-Speech

curl --request POST \
  --url https://api.example.com/tts \
  --header 'Content-Type: application/json' \
  --data '
{
  "text": "<string>",
  "language": "<string>",
  "voice_name": "<string>",
  "speed": 123,
  "pitch": 123,
  "volume_gain_db": 123,
  "api_key": "<string>"
}
'

import requests

url = "https://api.example.com/tts"

payload = {
    "text": "<string>",
    "language": "<string>",
    "voice_name": "<string>",
    "speed": 123,
    "pitch": 123,
    "volume_gain_db": 123,
    "api_key": "<string>"
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    text: '<string>',
    language: '<string>',
    voice_name: '<string>',
    speed: 123,
    pitch: 123,
    volume_gain_db: 123,
    api_key: '<string>'
  })
};

fetch('https://api.example.com/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.example.com/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>',
    'language' => '<string>',
    'voice_name' => '<string>',
    'speed' => 123,
    'pitch' => 123,
    'volume_gain_db' => 123,
    'api_key' => '<string>'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($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/tts"

	payload := strings.NewReader("{\n  \"text\": \"<string>\",\n  \"language\": \"<string>\",\n  \"voice_name\": \"<string>\",\n  \"speed\": 123,\n  \"pitch\": 123,\n  \"volume_gain_db\": 123,\n  \"api_key\": \"<string>\"\n}")

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

	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.example.com/tts")
  .header("Content-Type", "application/json")
  .body("{\n  \"text\": \"<string>\",\n  \"language\": \"<string>\",\n  \"voice_name\": \"<string>\",\n  \"speed\": 123,\n  \"pitch\": 123,\n  \"volume_gain_db\": 123,\n  \"api_key\": \"<string>\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.example.com/tts")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"text\": \"<string>\",\n  \"language\": \"<string>\",\n  \"voice_name\": \"<string>\",\n  \"speed\": 123,\n  \"pitch\": 123,\n  \"volume_gain_db\": 123,\n  \"api_key\": \"<string>\"\n}"

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

POST

tts

Basic Text-to-Speech

curl --request POST \
  --url https://api.example.com/tts \
  --header 'Content-Type: application/json' \
  --data '
{
  "text": "<string>",
  "language": "<string>",
  "voice_name": "<string>",
  "speed": 123,
  "pitch": 123,
  "volume_gain_db": 123,
  "api_key": "<string>"
}
'

import requests

url = "https://api.example.com/tts"

payload = {
    "text": "<string>",
    "language": "<string>",
    "voice_name": "<string>",
    "speed": 123,
    "pitch": 123,
    "volume_gain_db": 123,
    "api_key": "<string>"
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    text: '<string>',
    language: '<string>',
    voice_name: '<string>',
    speed: 123,
    pitch: 123,
    volume_gain_db: 123,
    api_key: '<string>'
  })
};

fetch('https://api.example.com/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.example.com/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>',
    'language' => '<string>',
    'voice_name' => '<string>',
    'speed' => 123,
    'pitch' => 123,
    'volume_gain_db' => 123,
    'api_key' => '<string>'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($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/tts"

	payload := strings.NewReader("{\n  \"text\": \"<string>\",\n  \"language\": \"<string>\",\n  \"voice_name\": \"<string>\",\n  \"speed\": 123,\n  \"pitch\": 123,\n  \"volume_gain_db\": 123,\n  \"api_key\": \"<string>\"\n}")

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

	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.example.com/tts")
  .header("Content-Type", "application/json")
  .body("{\n  \"text\": \"<string>\",\n  \"language\": \"<string>\",\n  \"voice_name\": \"<string>\",\n  \"speed\": 123,\n  \"pitch\": 123,\n  \"volume_gain_db\": 123,\n  \"api_key\": \"<string>\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.example.com/tts")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"text\": \"<string>\",\n  \"language\": \"<string>\",\n  \"voice_name\": \"<string>\",\n  \"speed\": 123,\n  \"pitch\": 123,\n  \"volume_gain_db\": 123,\n  \"api_key\": \"<string>\"\n}"

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

Overview

Generate high-quality speech from text using the default voice. This is the simplest way to convert text to speech.

Request Body

string

required

The text to convert to speech

string

default:"en"

Language code (e.g., “en”, “es”, “fr”). See supported languages

string

Optional voice name — either a KittenTTS voice (Bella, Jasper, Luna, Bruno, Rosie, Hugo, Kiki, Leo) or a Google Cloud voice (e.g. en-US-Wavenet-D). The name selects the engine. Use GET /tts/voices to discover available voices.

number

default:"1.0"

Speaking rate. Values < 1.0 slow down the voice, values > 1.0 make it faster.

number

default:"0.0"

Pitch adjustment in semitones. Positive values raise the pitch, negative values lower it.

number

default:"0.0"

Volume gain in decibels. Range is typically between -96.0 and +16.0.

string

required

Your GistMag API key

Example Request

curl -X POST https://api.gistmag.co.uk/tts \
  -H "Content-Type: application/json" \
  -d '{
    "text": "Hello, this is a test of the text-to-speech API.",
    "language": "en",
    "voice_name": "en-US-Wavenet-D",
    "speed": 1.0,
    "pitch": 0.0,
    "volume_gain_db": 0.0,
    "api_key": "your_api_key_here"
  }' \
  --output output.wav

Response

The response is an audio file (WAV format) with the generated speech. Content-Type: audio/wav Content-Disposition: attachment; filename=output.wav

Credit Cost

1 credit per 1,000 characters, with a minimum of 1 credit for any request.

Examples:

10 characters = 1 credit (minimum charge)
500 characters = 1 credit (minimum charge)
999 characters = 1 credit (minimum charge)
1,000 characters = 1 credit
1,001 characters = 2 credits (rounded up)
2,500 characters = 3 credits (rounded up)
5,000 characters = 5 credits

Example Usage

Python

import requests

response = requests.post(
        "https://api.gistmag.co.uk/tts",
    json={
        "text": "Hello, this is a test.",
        "language": "en",
        "voice_name": "en-US-Wavenet-D",
        "speed": 1.0,
        "pitch": 0.0,
        "volume_gain_db": 0.0,
        "api_key": "your_api_key_here"
    }
)

with open("output.wav", "wb") as f:
    f.write(response.content)

JavaScript

const response = await fetch('https://api.gistmag.co.uk/tts', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    text: 'Hello, this is a test.',
    language: 'en',
    voice_name: 'en-US-Wavenet-D',
    speed: 1.0,
    pitch: 0.0,
    volume_gain_db: 0.0,
    api_key: 'your_api_key_here'
  })
});

const audioBlob = await response.blob();
const audioUrl = URL.createObjectURL(audioBlob);
// Play the audio or download it

Text Length Limits

Maximum: 10,000 characters per request
Recommended: For longer text, use the batch endpoint

For very long text, consider using the batch endpoint which automatically splits text into manageable chunks.

Overview

Alt Text Generation

Text-to-Speech

Blog Meta Generator

Site Audit

Indexing

Management

Basic Text-to-Speech

Overview

Request Body

Example Request

Response

Credit Cost

Examples:

Example Usage

Python

JavaScript

Text Length Limits

​Overview

​Request Body

​Example Request

​Response

​Credit Cost

​Examples:

​Example Usage

​Python

​JavaScript

​Text Length Limits

Overview

Request Body

Example Request

Response

Credit Cost

Examples:

Example Usage

Python

JavaScript

Text Length Limits