Duolingo MCP Server for Vercel AI SDK 8 tools — connect in under 2 minutes
The Vercel AI SDK is the TypeScript toolkit for building AI-powered applications. Connect Duolingo through Vinkius and every tool is available as a typed function. ready for React Server Components, API routes, or any Node.js backend.
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Vinkius supports streamable HTTP and SSE.
import { createMCPClient } from "@ai-sdk/mcp";
import { generateText } from "ai";
import { openai } from "@ai-sdk/openai";
async function main() {
const mcpClient = await createMCPClient({
transport: {
type: "http",
// Your Vinkius token. get it at cloud.vinkius.com
url: "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
},
});
try {
const tools = await mcpClient.tools();
const { text } = await generateText({
model: openai("gpt-4o"),
tools,
prompt: "Using Duolingo, list all available capabilities.",
});
console.log(text);
} finally {
await mcpClient.close();
}
}
main();
* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure
About Duolingo MCP Server
Connect to Duolingo and explore language learning progress through natural conversation — no API key needed for public data.
The Vercel AI SDK gives every Duolingo tool full TypeScript type inference, IDE autocomplete, and compile-time error checking. Connect 8 tools through Vinkius and stream results progressively to React, Svelte, or Vue components. works on Edge Functions, Cloudflare Workers, and any Node.js runtime.
What you can do
- User Profiles — View any user's public profile including XP, streak, language and skill progress
- Version Info — Get API version info including supported languages and features
- Dictionary Hints — Get translation hints between any two supported languages
- Store Items — Browse Duolingo store items like streak freezes and power-ups
- Leaderboards — View leaderboard rankings by XP for users and languages
- Friends — See a user's friends list with their streaks and XP
The Duolingo MCP Server exposes 8 tools through the Vinkius. Connect it to Vercel AI SDK in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.
How to Connect Duolingo to Vercel AI SDK via MCP
Follow these steps to integrate the Duolingo MCP Server with Vercel AI SDK.
Install dependencies
Run npm install @ai-sdk/mcp ai @ai-sdk/openai
Replace the token
Replace [YOUR_TOKEN_HERE] with your Vinkius token
Run the script
Save to agent.ts and run with npx tsx agent.ts
Explore tools
The SDK discovers 8 tools from Duolingo and passes them to the LLM
Why Use Vercel AI SDK with the Duolingo MCP Server
Vercel AI SDK provides unique advantages when paired with Duolingo through the Model Context Protocol.
TypeScript-first: every MCP tool gets full type inference, IDE autocomplete, and compile-time error checking out of the box
Framework-agnostic core works with Next.js, Nuxt, SvelteKit, or any Node.js runtime. same Duolingo integration everywhere
Built-in streaming UI primitives let you display Duolingo tool results progressively in React, Svelte, or Vue components
Edge-compatible: the AI SDK runs on Vercel Edge Functions, Cloudflare Workers, and other edge runtimes for minimal latency
Duolingo + Vercel AI SDK Use Cases
Practical scenarios where Vercel AI SDK combined with the Duolingo MCP Server delivers measurable value.
AI-powered web apps: build dashboards that query Duolingo in real-time and stream results to the UI with zero loading states
API backends: create serverless endpoints that orchestrate Duolingo tools and return structured JSON responses to any frontend
Chatbots with tool use: embed Duolingo capabilities into conversational interfaces with streaming responses and tool call visibility
Internal tools: build admin panels where team members interact with Duolingo through natural language queries
Duolingo MCP Tools for Vercel AI SDK (8)
These 8 tools become available when you connect Duolingo to Vercel AI SDK via MCP:
get_daily_leaderboard
Shows top users by XP for the current day. Optionally specify language code and timezone. Get daily leaderboard for a language
get_dictionary_hints
Returns translation pairs for the given tokens. Useful for building flashcards or vocabulary tools. Target and source are language codes (e.g. "es", "fr", "de", "en"). Get dictionary hints for word translations
get_friends
Optionally provide a user ID. Returns friend usernames, IDs, streaks and XP totals. Get Duolingo friends list
get_leaderboard
Optionally provide a user ID to get leaderboard info for a specific user. Returns rankings with usernames, XP totals and positions. Get Duolingo leaderboard data
get_store_items
Requires authentication for full details. Returns item IDs, names, prices and descriptions. Get Duolingo store items
get_user_by_id
Returns the same data as get_user_by_username but uses the numeric ID instead. Get a Duolingo user profile by user ID
get_user_by_username
Returns username, user ID, avatar, current language, total XP, streak, skills and progress. Note: Full profile data (detailed progress, skill trees) requires authentication and only works for your own account. Get a Duolingo user profile by username
get_version_info
Useful for understanding available language codes and API capabilities. Get Duolingo API version information
Example Prompts for Duolingo in Vercel AI SDK
Ready-to-use prompts you can give your Vercel AI SDK agent to start working with Duolingo immediately.
"Show me the Duolingo profile for user 'john_doe'."
"Get translation hints for 'hello', 'world', 'cat' from English to Spanish."
"Who is on the Spanish leaderboard today?"
Troubleshooting Duolingo MCP Server with Vercel AI SDK
Common issues when connecting Duolingo to Vercel AI SDK through the Vinkius, and how to resolve them.
createMCPClient is not a function
npm install @ai-sdk/mcpDuolingo + Vercel AI SDK FAQ
Common questions about integrating Duolingo MCP Server with Vercel AI SDK.
How does the Vercel AI SDK connect to MCP servers?
createMCPClient from @ai-sdk/mcp and pass the server URL. The SDK discovers all tools and provides typed TypeScript interfaces for each one.Can I use MCP tools in Edge Functions?
Does it support streaming tool results?
useChat and streamText that handle tool calls and display results progressively in the UI.Connect Duolingo with your favorite client
Step-by-step setup guides for every MCP-compatible client and framework:
Anthropic's native desktop app for Claude with built-in MCP support.
AI-first code editor with integrated LLM-powered coding assistance.
GitHub Copilot in VS Code with Agent mode and MCP support.
Purpose-built IDE for agentic AI coding workflows.
Autonomous AI coding agent that runs inside VS Code.
Anthropic's agentic CLI for terminal-first development.
Python SDK for building production-grade OpenAI agent workflows.
Google's framework for building production AI agents.
Type-safe agent development for Python with first-class MCP support.
TypeScript toolkit for building AI-powered web applications.
TypeScript-native agent framework for modern web stacks.
Python framework for orchestrating collaborative AI agent crews.
Leading Python framework for composable LLM applications.
Data-aware AI agent framework for structured and unstructured sources.
Microsoft's framework for multi-agent collaborative conversations.
Connect Duolingo to Vercel AI SDK
Get your token, paste the configuration, and start using 8 tools in under 2 minutes. No API key management needed.