YepAPI
MicrosoftText to Speech/v1/media/queue

MAI-Voice-2.1 Flash API

MAI-Voice-2.1 Flash text to speech — low-latency expressive speech in 23 languages, billed on input length.

The low-latency tier of MAI-Voice-2.1, optimised for real-time responsiveness. Natural, expressive speech across 23 languages and 97 voices at roughly a third less per character.

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No credit card required. Takes 30 seconds.

MAI-Voice-2.1 Flash API pricing

Pay per request from your YepAPI balance — no subscription, no monthly minimum. Prices updated October 23, 2026.

BillingPrice
Rate$0.0316/1K chars
What it costsPer job
Short reply200 characters$0.0063
Blog post narration10,000 characters (~1,600 words)$0.316
Audiobook chapter100,000 characters$3.16

2,400+

Developers

1.2M+

API calls served

100+

Endpoints

$0.01

Per call

Yep, that's it.

Playground coming soon — use the API endpoint directly with your API key.

MAI-Voice-2.1 Flash specs

ProviderMicrosoft
Model IDmicrosoft/mai-voice-2.1-flash
Endpoint/v1/media/queue
TypeText to Speech
Output formatsmp3
Voices12 presets (default en-US-Harper:MAI-Voice-2.1-Flash)

How to get a MAI-Voice-2.1 Flash API key

  1. 1

    Create a free account

    Sign up at yepapi.com with Google or email. It takes about 30 seconds and needs no card.

  2. 2

    Create an API key

    Open the dashboard, go to API Keys and create a key. Copy it — it starts with yep_sk_.

  3. 3

    Call MAI-Voice-2.1 Flash

    Send a request to /v1/media/queue with the x-api-key header and model "microsoft/mai-voice-2.1-flash".

  4. 4

    Pay as you go

    Usage is billed per request from your balance. Top up any amount; there is no subscription.

Strengths

✓
Real-time responsiveness

Optimised for low latency, for voice agents and other interactive speech.

✓
Same 23 languages

Keeps MAI-Voice-2.1's language coverage and 97 voices across 28 locales.

✓
Human-like delivery

Natural intonation, rhythm, and emotional nuance at Flash speed.

✓
Cheaper per character

Roughly a third less than MAI-Voice-2.1 per character.

Quick start

Copy this snippet and start making calls with MAI-Voice-2.1 Flash.

// Step 1: Submit job
const res = await fetch('https://api.yepapi.com/v1/media/queue', {
  method: 'POST',
  headers: {
    'x-api-key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "model": "microsoft/mai-voice-2.1-flash",
    "prompt": "Thanks for holding. I've found your booking — would you like the earlier flight or the one after lunch?",
    "options": {
      "voice": "en-US-Harper:MAI-Voice-2.1-Flash"
    }
  }),
});
const { data } = await res.json();
const jobId = data.jobId;

// Step 2: Poll for result
const status = await fetch(`https://api.yepapi.com/v1/media/status/${jobId}`, {
  headers: { 'x-api-key': 'YOUR_API_KEY' },
});
const { data: job } = await status.json();
// job.status: "pending" | "processing" | "completed" | "failed"
// job.result: { text?, image?, audio?, video? }

MAI-Voice-2.1 Flash vs similar models

Every model below runs on the same API key — switch by changing the model ID.

ModelProviderPrice
MAI-Voice-2.1 FlashMicrosoft$0.0316/1K chars
MAI-Voice-2 FlashMicrosoft$0.0317/1K chars
MAI-Voice-2.1Microsoft$0.0464/1K chars
MAI-Voice-2Microsoft$0.0465/1K chars
Kokoro 82Mhexgrad$0.0014/1K chars
Fish Audio Drama 3Fish Audio$0.0042/1K chars
HeyGen Voice TurboHeyGen$0.0084/1K chars
Sesame CSM 1BSesame$0.0148/1K chars

Why use MAI-Voice-2.1 Flash through YepAPI?

✓One API key for all models — no separate accounts
✓No monthly minimums — pay per call
✓Switch models with one line of code
✓Simple REST API — works from any language
✓Unified billing across all providers
✓No rate limits for most use cases

MAI-Voice-2.1 Flash API — low-latency speech from Microsoft AI

MAI-Voice-2.1-Flash is a low-latency text-to-speech model from Microsoft AI, optimised for real-time responsiveness. It produces natural, expressive speech across 23 languages, with human-like intonation, rhythm, and emotional nuance.

On YepAPI it is a single `POST /v1/media/queue` call billed at $0.0316 per 1,000 characters — roughly a third less than MAI-Voice-2.1 — on the same key that reaches every other speech, image, and video model.

Start generating in 30 seconds

$5 free credit on signup. No credit card required. Pay per call.

Get API Key

What developers say

“Switched from SerpAPI and cut our SERP costs by 80%. Same data quality, way simpler billing.”

Marcus T.

SEO Platform Founder

“One API key for AI models, SERP data, and web scraping. Saved us from managing 4 separate providers.”

Priya S.

Full-Stack Developer

“The $5 free credit let us prototype our entire rank tracking feature before committing. No other API does that.”

Jake R.

Indie Hacker

Frequently asked questions

The low-latency tier of MAI-Voice-2.1, optimised for real-time responsiveness. Natural, expressive speech across 23 languages and 97 voices at roughly a third less per character.

MAI-Voice-2.1 Flash costs $0.0316/1K chars through YepAPI, billed per request with no monthly fee. For example, a short reply (200 characters) costs about $0.0063.

Sign up at yepapi.com (Google or email, about 30 seconds), open the dashboard and create an API key. The same key works for MAI-Voice-2.1 Flash and every other model — no separate Microsoft account or waitlist.

New YepAPI accounts in most countries get free signup credit, enough to test MAI-Voice-2.1 Flash without a card. After that you pay per request at the rates above — there is no subscription.

Use "microsoft/mai-voice-2.1-flash" as the model on /v1/media/queue. The short alias "mai-voice-2-1-flash" also works.

Ready to use MAI-Voice-2.1 Flash?

$5 free credit on signup. No credit card required. Pay per call.

Get API Key — Free $5 Credit Read Docs

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