flashcard-mcp

An MCP server that gives Claude (or any MCP client) the ability to create, review, and manage flashcards with spaced repetition (SM-2 algorithm).

Organize cards into projects, tag them by topic, and let the scheduling algorithm figure out when you need to see each card again.

100% vibecoded.

Blog post

Read about how I use this MCP to learn math: Flashcards MCP

Installation

The server URL is:

https://flashcards.louisarge.com/api/mcp

It works out of the box — just add it as a remote MCP server in your client and sign in with Google when prompted.

Video tutorials

• Installing in Claude
• Installing in ChatGPT

Tools

• create_project / list_projects — organize cards into projects
• read_memory / write_memory / edit_memory — persistent per-project notes and context
• create_flashcard / edit_flashcard / list_flashcards / delete_flashcard — manage cards
• get_due_flashcards — get cards that are due for review
• review_flashcard — record how well you remembered (1-4), updates the schedule
• get_flashcard_answer — reveal the answer after quizzing yourself

Self-hosting

The api/mcp.ts endpoint runs as a Vercel serverless function, backed by Upstash Redis.

Connect an Upstash Redis database via Vercel's Storage integration — it'll set up KV_REST_API_URL and KV_REST_API_TOKEN automatically.

Firebase setup

Authentication uses Firebase Google Sign-In. You'll need a Firebase project with Google auth enabled.

Server environment variables (set in Vercel):

• FIREBASE_PROJECT_ID — Firebase project ID
• FIREBASE_CLIENT_EMAIL — Firebase service account email
• FIREBASE_PRIVATE_KEY — Firebase service account private key, PEM format

Client-side Firebase config lives in api/authorize.ts — update the firebase.initializeApp({...}) block with your own Firebase project credentials.