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Flash MCP Server

by flashmemorize Your server? Claim it
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Flash is answering right now. Last checked 12 min ago. Last commit 24 Oct 2026.

Spaced-repetition flashcards your AI writes, quizzes you on by voice, and schedules with FSRS.

Uptime history 57 days of history · worst day 92%
57 days agonow
98.9%
Uptime 24h
90 of 91 checks
—
Tools
hidden behind auth
460 ms
Response time
average over 24h
7
Stars
last commit 24 Oct 2026

What the code does

We read the source, 2 d ago · rules 995398eba69f

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

Builds a database query by concatenation crates/flash-server/templates/deck.html:223
        <select class="fl-input fl-select" id="deck-bulk-to">
          {% for (id, path) in move_targets %}<option value="{{ id }}"{% if *id == deck_id %} selected{% endif %}>{{ path }}</option>{% endfor %}

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 12 min ago.

run in your terminal
claude mcp add flash --transport http https://flashmemorize.com/mcp
Settings → Connectors → Add custom connector, then paste this address
https://flashmemorize.com/mcp
~/.codex/config.toml
[mcp_servers.flash]
url = "https://flashmemorize.com/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "flash": {
      "url": "https://flashmemorize.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "flash": {
      "type": "http",
      "url": "https://flashmemorize.com/mcp"
    }
  }
}

This endpoint answered with an authorization challenge. The server is running, and it signs you in through your browser: there is no API key to paste.

Endpoints

URLTransportStateLatencyChecked
https://flashmemorize.com/mcp streamable-http sign-in 495 ms 12 min ago

Alternatives to Flash

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Quizlar — voice-powered AI flashcards with spaced repetition
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Voice-led, FSRS-scheduled flashcards from YouTube, PDFs, web, or text. Auto-graded quizzes.

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Memora
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Flashcards, multiple-choice quizzes, mind maps and spaced-repetition reviews from your study notes.

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S
Studycards
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Flashcards for Claude: create, edit and study StudyCards decks with FSRS spaced repetition.

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EngrAmo
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Create and study EngrAmo spaced-repetition flashcards from your AI client.

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Acornonaut
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Turn YouTube playlists into AI flashcards and learn with spaced repetition.

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Azri Flashcards
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Save flashcards to Azri, the FSRS spaced repetition app for iPhone and iPad, and search your cards.

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Flash — questions

Answers built from our own checks of this server.

Why is there no tool list for Flash?
The server answered our handshake with an authorization challenge, so it is running — but it will not describe its tools to an anonymous client. To see them you need to connect with your own credentials. We record it as alive, not as broken: 98.9% of checks in the last 24 hours got a reply.
Is Flash working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 90 of 91 checks got a reply (98.9%), average response time 460 ms. The bar chart above shows every period we have measured.
How do I connect Flash?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address. You sign in through your browser once and the client keeps the session: no key to copy, and it refuses anonymous clients.
How do you sign in to Flash?
No API key is involved. Flash answers our knock with an OAuth challenge, so you authorise it once in your browser and the client keeps the session. That is also why we see no tool list: it will not describe itself to an anonymous client, and that is the server working as intended, not a fault.
How fast is Flash?
It answers our handshake in 460 ms on average, which is faster than 28% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is Flash open source?
The code is open source: it is published under the AGPL-3.0 licence, written in Rust and 7 stars on GitHub. The licence covers the code in the repository, not the hosted service at flashmemorize.com, which runs on its operator's own terms.