⚡ Developer API

AI narration, one POST away

A plain REST text-to-speech endpoint — 53 voices across 15 languages, MP3 out. Pay per character from your plan's credit balance, with no separate API subscription.

Quick start

  1. Create an account and pick a plan (from $4/month — every plan includes monthly credits).
  2. Create an API key on your dashboard.
  3. POST your text — get an MP3 back.
curl https://vidsly.ai/api/v1/tts \
  -H "Authorization: Bearer ksk_live_YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "text": "Three numbers came out this morning, and every one of them moved the market.",
    "voice": "azure-aria",
    "speed": "normal"
  }' \
  --output story.mp3

MCP — drive the studio from inside Claude

Add our MCP server to Claude Code or Claude Desktop and just ask: "Narrate this script in Aria's voice and send me the MP3." The file or a watch link comes back in the chat. Presenter videos cost 500 credits; audio narration is 1 credit per 10 characters.

{
  "mcpServers": {
    "vidsly": {
      "command": "npx",
      "args": ["-y", "vidsly-mcp"],
      "env": { "VIDSLY_API_KEY": "ksk_live_..." }
    }
  }
}

Tools: create_talking_storybook · get_storybook_status · list_characters · create_audio_story — package: vidsly-mcp

▶️ Try it

Hear any voice before you integrate. (Uses your account's character allowance — no API key needed here.)

80/300

POST /api/v1/tts

text required — NO length limit. Up to ~20,000 characters returns audio directly; longer texts return 202 + a jobId to poll (GET /api/v1/tts?jobId=…) for the MP3 URL. Truly unlimited.

voice — voice id (default azure-aria). See the list below or GET /api/v1/voices.

speedslow | normal | gentle.

formatmp3 (binary, default) or json (base64).

const res = await fetch("https://vidsly.ai/api/v1/tts", {
  method: "POST",
  headers: {
    "Authorization": "Bearer ksk_live_YOUR_KEY",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    text: "Os mercados abriram em silêncio esta manhã…",
    voice: "azure-pt-francisca",
    format: "json", // base64 instead of binary
  }),
});
const { audio, credits_charged } = await res.json();

Errors are JSON: { "error": { "code", "message" } }401 bad key, 402 not enough credits, 400 invalid input or content rejected, 429 rate limited. You are never charged for a failed request.

Pricing

1 credit per 10 characters (minimum 1 credit per request), from the same credit balance as the rest of Vidsly. Every plan includes monthly credits — from 5,000 on Basic ($4/month) up to 200,000 on Studio — so roughly $0.045–0.06 per 1,000 characters. Unused credits bank for 90 days.

This API
Per 1,000 chars$0.045–0.08, depending on plan
Separate API subscriptionNone — included from the Pro plan up
Max characters per request1,000,000 (long jobs return a jobId to poll)

Content safety

Every request is screened by an AI moderation layer before synthesis. Text that falls outside our content policy is rejected (HTTP 400 content_rejected, no charge): sexual content, hate speech, threats against real people, instructions for violent wrongdoing, and graphic gore. Reporting on a difficult subject is fine — depicting it explicitly is not, so true crime, war, hard news and politics all pass. If the moderation provider is unreachable the request fails closed with a 503 rather than being synthesised unchecked.

Voices

Young / character voices (15)

kid-girlEnglish (US)
kid-babyEnglish (US)
kid-britishEnglish (UK)
kid-spanishSpanish (Mexico)
kid-frenchFrench
kid-germanGerman
kid-chineseChinese (Mandarin)
kid-italianItalian
kid-portuguesePortuguese (Brazil)
kid-japaneseJapanese
kid-turkishTurkish
kid-arabicArabic
kid-koreanKorean
kid-hindiHindi
kid-bengaliBengali

Narration voices (38)

azure-ariaEnglish (US)
azure-jennyEnglish (US)
azure-michelleEnglish (US)
azure-monicaEnglish (US)
azure-saraEnglish (US)
azure-guyEnglish (US)
azure-davisEnglish (US)
azure-tonyEnglish (US)
azure-freyaEnglish (AU)
azure-williamEnglish (AU)
azure-neerjaEnglish (IN)
azure-emilyEnglish (IE)
calm-momEnglish (US)
sweet-teacherEnglish (US)
sunny-friendEnglish (US)
bedtime-whisperEnglish (US)
playful-elfEnglish (US)
friendly-bearEnglish (US)
story-dadEnglish (US)
cozy-uncleEnglish (US)
gentle-giantEnglish (US)
story-grandpaEnglish (US)
azure-es-daliaSpanish (Mexico)
azure-es-jorgeSpanish (Mexico)
azure-es-elenaSpanish (Spain)
azure-fr-deniseFrench
azure-fr-henriFrench
azure-fr-vivienneFrench
azure-de-katjaGerman
azure-de-konradGerman
azure-de-amalaGerman
azure-pt-franciscaPortuguese (Brazil)
azure-pt-antonioPortuguese (Brazil)
azure-pt-thalitaPortuguese (Brazil)
azure-it-isabellaItalian
azure-it-giuseppeItalian
azure-ko-sunhiKorean
azure-ko-injoonKorean

Questions? Contact us — we reply within 24 hours.