Put Indian-language voice in your product

SDKs

Small, dependency-free clients for Python (3.9+) and JavaScript (Node 18+), tested on Python 3.13 and Node 24. They handle authentication, decoding audio, error types and retrying when you are rate limited. The SDKs are in the sdk/ folder of the project; they are not on PyPI or npm yet, so install them from that folder for now.

from synvoice import SynVoice

client = SynVoice()   # reads SYNVOICE_API_KEY and SYNVOICE_BASE_URL

client.tts("नमस्ते, SynVoice में आपका स्वागत है", language="hi").save("hello.wav")

print(client.transcribe("hello.wav").text)
print(client.translate("Good morning", "hi-IN").text)
print("credits left:", client.balance())

import { SynVoice } from "synvoice";
import { writeFile } from "node:fs/promises";

const client = new SynVoice(); // reads SYNVOICE_API_KEY and SYNVOICE_BASE_URL

const speech = await client.tts("வணக்கம், SynVoice க்கு வரவேற்கிறோம்", "ta");
await writeFile("hello.wav", speech.toBuffer());

console.log((await client.translate("Good morning", "hi-IN")).text);
console.log("credits left:", await client.balance());

Authentication

Send your key as a bearer token on every request: Authorization: Bearer sk_synvoice_live_…

• Keep it on your server. Anyone with the key can spend your credits. Never put it in a web page, mobile app or public repository.
• Scopes. Each key is limited to the endpoints you choose when you create it (Text to Speech, Speech to Text, Translation, Voice Conversion).
• Whose credits. A key spends either your personal credits or — if you are a workspace owner or admin — a workspace's shared pool. Usage is shown per key on the API keys page.
• Rotate and revoke. Replace a key if it may have leaked; revoking takes effect immediately. Keys can be set to expire.
• We store a fingerprint, not your key. We cannot show it again or recover it.

Endpoints

All paths are relative to https://YOUR-API-HOST/api/v1. Requests and responses are JSON.

Credits

The API bills the same credits as the app — see the cost column above and the pricing page. Credits are only deducted after a request succeeds; a failed or rate-limited request costs nothing. Call GET /balance to check what is left.

Errors

Errors use normal HTTP status codes and a JSON body with a human-readable message and, where it helps, a machine-readable code.

{
  "message": "Not enough credits for this request. Please top up or upgrade your plan.",
  "code": "INSUFFICIENT_CREDITS",
  "balance": 12,
  "required": 29
}

Rate limits

Each key can make 60 requests per minute. Every response carries X-RateLimit-Limit and X-RateLimit-Remaining; when you run out you get a 429 with a Retry-After header (seconds). Repeated requests with invalid keys from one address are throttled too. Need more? Contact us.