AI Voice API for Developers: Getting Started with Text to Speech
If you build apps, bots, games or automation tools, you can add speech to your product with a text to speech API. Instead of using a web page, your code sends text to a server and receives audio back. This article explains the general flow and the best practices. For exact endpoints, fields and authentication, always read the FSMB API documentation.
What an AI voice API can do
- Convert text to speech with a chosen voice and language.
- List the available voices so users can pick one inside your app.
- Create a voice clone from an audio sample (where your plan allows it).
- Return audio files that you can store, stream or send to users.
The typical request flow
Most voice APIs work asynchronously, because generating audio can take a few seconds or more for long text. The usual flow has three parts:
- Submit a job. Your server sends the text, the voice identifier and any options. The API replies immediately with a task identifier.
- Check the task. Your code asks for the status of that task every one or two seconds, or receives a notification when it finishes.
- Download the audio. When the task is complete, the response contains a link to the audio file. Download it or serve it to your user.
Choosing a voice and model
List the voices first and filter by language, gender or style. Store the voice identifier in your own settings so you can change it later without changing your code. If the API offers several models, use a higher quality model for final content and a faster model for previews or live interaction.
Best practices
- Keep your key secret. Never place an API key in browser code or in a public repository. Call the API from your server and give the browser only the result.
- Limit text length. Split long documents into paragraphs and generate them one by one.
- Handle errors. Check for failed tasks, insufficient balance and rate limits, and show a clear message to the user.
- Cache results. If the same text and voice are requested again, reuse the stored audio instead of paying for a new generation.
- Retry politely. Wait a little longer between each retry when polling, instead of sending many requests per second.
- Track usage. Count characters per user so you can set limits and understand costs.
Ideas to build
- A Telegram or WhatsApp bot that replies with voice messages.
- A website plugin that reads articles aloud.
- A learning app with spoken lessons in many languages.
- An automated video tool that adds narration to generated scripts.
Next step
Create an account, open the API documentation, generate a key and run your first request with a short sentence. Once it works, add polling and error handling, and you are ready to build the rest of your product.