Text-to-Speech API with Natural AI Voices — Realtime & Batch

Turn any text into lifelike speech with a developer-first TTS API: low-latency realtime streaming, high-throughput batch jobs, and voice cloning — billed simply per 1,000 characters. Get an instant API key and ship today.

This is a production-ready text-to-speech REST API built for developers who want natural AI voices without managing models, GPUs, or infrastructure. Send text, get back clean audio. You pay only for the characters you synthesize — no seats, no idle servers, no surprise minimums. Whether you are voicing an IVR phone tree, narrating an audiobook, generating podcast intros, or adding spoken responses to a chatbot, you call one endpoint and the audio comes back.

What you get

• An instant API key delivered the moment your order is confirmed — no waitlist, no sales call, no onboarding meeting. Drop the key into an Authorization header and start synthesizing within minutes.
• A simple REST endpoint (POST /v1/tts) that accepts plain text or SSML, a voice ID, and output settings, and returns audio. JSON in, audio out.
• Realtime streaming synthesis — request stream=true and receive audio chunks as they are generated, so playback can begin before the full clip is rendered. Ideal for conversational agents and live voice UIs where time-to-first-byte matters.
• Batch synthesis for large jobs — submit long documents or many segments in a single asynchronous request, poll for completion, and download the finished audio. Built for audiobooks, course narration, and bulk content pipelines.
• A voice cloning endpoint (POST /v1/voices/clone) — upload a short, clean sample of a voice you have the rights to use, receive a reusable custom voice_id, and synthesize unlimited text in that voice afterward.
• A library of natural, expressive AI voices across multiple languages and accents, covering male, female, and neutral timbres for narration, dialogue, and assistant-style delivery.
• Standard audio formats — MP3 and WAV output with selectable sample rates, so the files drop straight into your player, phone system, video editor, or storage bucket.
• SSML support for fine control over pauses, emphasis, pronunciation, and pacing when you need the read to be exact.
• Per-1,000-character metered billing — transparent usage you can predict from your own content length. Count your characters, know your spend.
• Usage you can call from anywhere — any language that can make an HTTPS request works: cURL, JavaScript/Node, Python, Go, PHP, Ruby. No proprietary SDK is required, though copy-paste examples are provided.

Plans

All plans use the same API, the same voices, and the same endpoints. Tiers differ by monthly character volume, concurrency, and access to voice cloning and batch features.

Feature	Starter	Growth	Scale
Realtime + batch endpoints	Included	Included	Included
Monthly character allowance	Light volume for prototypes and small apps	Higher volume for production apps	High volume for large-scale pipelines
Concurrent requests	Entry-level concurrency	Raised concurrency	Maximum concurrency
Voice library access	Full standard voice library	Full standard voice library	Full standard voice library
Voice cloning endpoint	Not included	Included (limited custom voices)	Included (expanded custom voices)
Streaming time-to-first-byte priority	Standard	Priority	Highest priority
Support	Email	Priority email	Priority + faster response

How it works

1. Order the plan that matches your expected monthly character volume.
2. Receive your API key instantly along with the base URL and endpoint reference.
3. Make your first call — send a POST /v1/tts request with your text, a chosen voice_id, and your desired format. cURL and code snippets are included so you can confirm it works in under five minutes.
4. Choose realtime or batch — set stream=true for low-latency streaming audio, or submit a batch job for large documents and poll for the result.
5. (Optional) Clone a voice — on plans that include it, upload a clean sample to POST /v1/voices/clone, get back a voice_id, and reuse it in every future synthesis call.
6. Ship it — wire the audio into your app, phone system, video, or content pipeline. You are billed per 1,000 characters synthesized.

Why choose this

• Instant access, zero setup. The key is delivered on order. There is no cluster to provision and no model to download or fine-tune.
• One endpoint does both jobs. The same API serves snappy realtime streaming and heavy batch rendering — you do not stitch together two products.
• Honest, character-based pricing. Billing tracks your actual content length, so cost is predictable from the word count you already have.
• Real voice cloning, not just presets. Create a custom voice from a sample and reuse it consistently across every project.
• Framework-agnostic. It is plain HTTPS and JSON, so it fits any stack without a lock-in SDK.
• Built to scale with you. Move from a prototype tier to high-volume concurrency without changing your code — only the key's plan changes.

Who it's for / use cases

• Conversational AI and chatbot builders who need the assistant to speak responses aloud with low latency via the streaming endpoint.
• IVR and phone-system developers generating dynamic prompts, menus, and account messages without re-recording a voice actor every time.
• Audiobook and e-learning producers rendering long-form text into clean narration through batch synthesis.
• Podcast and video creators who want intros, voiceovers, and narration in a consistent voice, including a cloned signature voice.
• Accessibility teams adding read-aloud and screen-narration features to apps and documents.
• SaaS and app developers who want to add a "listen" button or spoken notifications without building a speech stack in-house.
• Agencies and indie hackers who need natural TTS on a per-usage basis instead of an enterprise contract.

FAQ

Q: How fast do I get access? Your API key is delivered instantly once the order is confirmed. You can make your first synthesis call within minutes using the included cURL example.

Q: What is the difference between realtime and batch? Realtime streaming returns audio chunks as they are generated, so playback starts almost immediately — best for live agents and voice UIs. Batch accepts large or long jobs asynchronously and returns the finished audio when complete — best for audiobooks and bulk content.

Q: How am I billed? Usage is metered per 1,000 characters of text you synthesize. Because you know your content length up front, your usage is predictable and easy to estimate.

Q: What audio formats are supported? You can request MP3 or WAV with selectable sample rates, so the output drops directly into players, phone systems, video editors, or storage.

Q: Can I create a custom voice? Yes. On plans that include voice cloning, upload a short, clean sample of a voice you are authorized to use, receive a reusable voice_id, and synthesize any text in that voice afterward.

Q: Which programming languages can I use? Any language that can send an HTTPS request — JavaScript/Node, Python, Go, PHP, Ruby, and more. The API is plain REST with JSON, so no proprietary SDK is required.

Q: Do you support SSML and pronunciation control? Yes. SSML lets you control pauses, emphasis, pacing, and pronunciation when you need the read to be precise rather than fully automatic.

Q: What about voice cloning rights? You are responsible for having the legal rights and consent to clone any voice you upload. The cloning endpoint is intended for your own voice or voices you are explicitly authorized to reproduce.