Model Context Protocol

Language Games MCP Server

Connect ChatGPT, Claude, Cursor, Windsurf, or any Model Context Protocol client to Language Games. Quiz flashcards with FSRS spaced repetition, manage decks, translate, and generate mnemonics — all synced to your account via OAuth 2.1.

MCP Server Endpoint

Live & Ready

Add this endpoint to your MCP client. Authentication is handled seamlessly in your browser via OAuth 2.1 — no API keys to copy, and all data is secured by Supabase Row-Level Security.

https://language.games/api/mcp

Transport: Streamable HTTP
Auth: OAuth 2.1 (PKCE)
Algorithm: FSRS Spaced Repetition

Setup in Your Client

Option A: Claude.ai (Web / Pro / Team)

Navigate to Settings → Connectors in Claude.
Click Add custom connector.
Paste the MCP Server URL: https://language.games/api/mcp
Sign in with your Language Games account and grant access.

Open Claude Connectors

Option B: Claude Desktop App

Add the server configuration to your claude_desktop_config.json:

{
  "mcpServers": {
    "language-games": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote@latest",
        "https://language.games/api/mcp"
      ]
    }
  }
}

Try These Prompts

Once connected, try asking your AI assistant any of these commands to test your study loop:

Spaced Repetition Quiz

“Quiz me on 5 due flashcards from my current learning language. Give me one card at a time and grade my answers.”

Create Deck & Add Vocabulary

“Create a new deck called 'Travel Japanese' and generate 10 useful conversational phrases for ordering food.”

Mnemonic Memory Hook

“Give me a memorable sound-link mnemonic for the Spanish word 'desafío' (challenge).”

Article to Flashcards

“Extract the key intermediate vocabulary from this paragraph into flashcard pairs and add them to my default deck.”

Security & Privacy

OAuth 2.1 with PKCE: Client credentials and access tokens are negotiated securely without sharing your password or secret keys with the AI model.
Row-Level Security: Every tool execution runs strictly within your authenticated Supabase user scope — the AI can never access or modify other users' decks.
Spaced Repetition Integrity: Reviews submitted via rate_card immediately calculate the Next Interval using FSRS (Free Spaced Repetition Scheduler), keeping your web and mobile app sync in perfect harmony.

12 Available MCP Tools

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list_decks

List your flashcard decks with card counts and target language.

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list_cards

List cards in one of your decks.

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list_due_cards

List cards that are due for review right now.

write

create_deck

Create a new deck (target language required).

write

create_card

Add a flashcard to one of your decks.

write

rate_card

Rate a card (Again/Hard/Good/Easy) to advance FSRS scheduling and streak.

read

get_profile

Get your streak, preferred language, and Pro status.

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lookup_word

Look up a word in Language Games' knowledge base.

translate

Translate short text into any supported language.

generate_cards

Extract flashcard pairs from a passage of text.

explain

Short tutor-style explanation of a word or phrase.

mnemonic

Generate a memorable sound-link mnemonic for a word.

Prefer a REST API?

The same operations are also available via the REST Language Games API, authenticated with a personal API key from your Settings page.