Documentación

Install the SDK or use the REST API directly:

npm install murmr

import { Murmr } from 'murmr';
const murmr = new Murmr({ apiKey: 'your-api-key' });
const audio = await murmr.speech.create({
  input: 'Hello, world!',
  voice: 'warm male narrator, slight British accent',
});

All API requests require an API key. Include it in the Authorization header:

curl https://api.murmr.dev/v1/audio/speech \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"input": "Hello!", "voice": "friendly narrator"}'

POST /v1/audio/speech

Generate audio from text using VoiceDesign or preset voices.

Parameter	Type	Required	Description

input	string	Yes	Text to synthesize (max 4096 chars)
voice	string	Yes	Voice description or preset ID
language	string	No	Target language (default: auto-detect)
response_format	string	No	mp3, wav, opus, flac (default: mp3)
speed	number	No	0.25 to 4.0 (default: 1.0)

Response: Audio file in requested format

Create custom voices by describing them in natural language:

{
  "input": "Welcome to our podcast!",
  "voice": "warm female narrator, mid-30s, calm and confident, slight podcast energy"
}

Tips for voice descriptions: - Include age range (young, mid-30s, elderly) - Specify tone (warm, professional, energetic) - Add accent if needed (British, Southern US, neutral) - Describe energy level (calm, excited, conversational)

murmr supports 10 languages with native speaker quality:

Language	Code	Quality

English	en	Native
Spanish	es	Native
Portuguese	pt	Native
German	de	Native
French	fr	Native
Italian	it	Native
Chinese	zh	Native
Japanese	ja	Native
Korean	ko	Native
Russian	ru	Native

murmr is a drop-in replacement for OpenAI TTS. Change one line:

// Before (OpenAI)
const openai = new OpenAI({ apiKey: 'sk-...' });
// After (murmr)
const openai = new OpenAI({
  apiKey: 'your-murmr-key',
  baseURL: 'https://api.murmr.dev/v1'
});
// Same code works!
const audio = await openai.audio.speech.create({
  model: 'tts-1',
  voice: 'alloy',
  input: 'Hello world!',
});

Plan	Requests/min	Characters/month

Free	10	50,000
Starter	60	200,000
Pro	300	1,000,000

Rate limit headers are included in every response: - X-RateLimit-Limit - X-RateLimit-Remaining - X-RateLimit-Reset