Real kid voices, one POST away

Quick start

1. Create an account and pick a plan (from $3/month — every plan includes monthly credits).
2. Create an API key on your dashboard.
3. POST your text — get an MP3 back.

curl https://kidsstoryteller.ai/api/v1/tts \
  -H "Authorization: Bearer ksk_live_YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "text": "Once upon a time, in a forest full of wonder, a little fox found a glowing seed.",
    "voice": "kid-girl",
    "speed": "normal"
  }' \
  --output story.mp3

🦊 MCP — turn Claude into a bedtime-story engine

Add our MCP server to Claude Code or Claude Desktop and just ask: "Have Milo read this story about Ada — use the photo of her room as the scene." An animated, lip-synced video link comes back in the chat. Talking-character videos cost 500 credits; audio narration is 1 credit per 10 characters.

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

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

▶️ Try it

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

POST /api/v1/tts

const res = await fetch("https://kidsstoryteller.ai/api/v1/tts", {
  method: "POST",
  headers: {
    "Authorization": "Bearer ksk_live_YOUR_KEY",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    text: "Era uma vez uma raposa azul…",
    voice: "kid-portuguese",
    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 KidsStoryteller. Every plan includes monthly credits — from 5,000 on Basic ($3/month) up to 200,000 on Studio — so roughly $0.045–0.06 per 1,000 characters. Unused credits bank for 90 days.

Content safety

Every request is screened by an AI moderation layer before synthesis. Text that isn't appropriate for a kids platform is rejected (HTTP 400, no charge). This is non-negotiable — these are children's voices.