Build on Tutro.

Once you have a key from Settings → Developer, every endpoint lives under https://app.tutro.ai/api/v1. Authenticate with a bearer token:

curl https://app.tutro.ai/api/v1/credits \
  -H "Authorization: Bearer tutr_xxx"

Zero-dependency wrapper around fetch. Works on Node 18+, Deno, Bun, and the browser.

npm install @tutro/sdk

import { TutroClient } from "@tutro/sdk";

const tutro = new TutroClient({ apiKey: process.env.TUTRO_API_KEY! });

// Kick off a lesson
const { lessonId } = await tutro.lessons.create({
  topic: "Photosynthesis in plants",
  gradeLevel: "5",
});

// Poll until it's ready
while (true) {
  const { lesson } = await tutro.lessons.get(lessonId);
  if (lesson.status === "ready") break;
  await new Promise((r) => setTimeout(r, 3000));
}

Tutro ships a native Model Context Protocol server. Drop this into your MCP config and your AI client can create lessons, list your learners, and check your balance as tool calls — entirely through natural language.

{
  "mcpServers": {
    "tutro": {
      "url": "https://app.tutro.ai/api/mcp",
      "headers": {
        "Authorization": "Bearer tutr_xxx"
      }
    }
  }
}

Exposed tools: list_lessons, get_lesson, create_lesson, list_learners, credits_balance.

API and MCP calls don't have a separate plan. Every credit-consuming operation (LLM tokens, image generation, TTS, video render) bills the API key owner's balance at the same per-unit rates the web app uses. Free operations (listing lessons, checking balance) stay free. Top up or upgrade from Settings → Billing.