# Flashcards by Fulin Labs (remote · flashcard.fulinlabs.com)

Learn vocabulary from daily life with flashcards, examples, pronunciation and shareable study links.

- Trust score: 73/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `flashcard.fulinlabs.com`: 73/100 (this document), [markdown](https://verifymcp.io/servers/aeither-flashcards/api-mcp.md), [page](https://verifymcp.io/servers/aeither-flashcards/api-mcp)

## Channel facts

- Endpoint: `https://flashcard.fulinlabs.com/api/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `6.7.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-11-05.

- **Endpoint Security**: 80/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 73/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 1431 tokens (~357/item across 4 items; 3 tools + 1 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 10/100
  - Stability observed for 3 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 73/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.
  - Supports UI / widget rendering.

## Install

### How do I install the Flashcards by Fulin Labs MCP server?

Flashcards by Fulin Labs is a hosted endpoint at https://flashcard.fulinlabs.com/api/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http aeither-flashcards 'https://flashcard.fulinlabs.com/api/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "aeither-flashcards": {
      "url": "https://flashcard.fulinlabs.com/api/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "aeither-flashcards": {
      "type": "http",
      "url": "https://flashcard.fulinlabs.com/api/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.aeither-flashcards]
url = "https://flashcard.fulinlabs.com/api/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "aeither-flashcards": {
      "type": "remote",
      "url": "https://flashcard.fulinlabs.com/api/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add aeither-flashcards --url 'https://flashcard.fulinlabs.com/api/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  aeither-flashcards:
    url: "https://flashcard.fulinlabs.com/api/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "aeither-flashcards": {
      "Transport": "http",
      "Url": "https://flashcard.fulinlabs.com/api/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add aeither-flashcards -t streamable-http -u 'https://flashcard.fulinlabs.com/api/mcp'
```

### Other

```json
{
  "mcpServers": {
    "aeither-flashcards": {
      "type": "http",
      "url": "https://flashcard.fulinlabs.com/api/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-11-04 (score 73, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-03 (score 72, 0)

- [functional improvement] Stability: unverified → 0.03

### 2026-11-02 (score 72)

First indexed and scored.

## MCP tools (3)

### `create_flashcard_deck` (~357 tokens)

Create and study flashcards

Use this when the user asks to learn, study, memorize, review, practice, or create flashcards about any topic. Generate the complete deck in this call and open it in the interactive flashcard UI. Act immediately using the existing conversation and source material; infer language and backLanguage yourself. Never ask the user for language codes, tool arguments, or confirmation of an already requested deck. For a request for 50 cards, submit all 50 completed cards in one call. Keep the response brief and let the study UI show the deck. Examples include 'I want to learn about X', 'teach me X with flashcards', and 'Create an HSK3 vocabulary deck about restaurants'. Do not call a separate add-card tool. Do NOT use when the user asks for a direct explanation without study intent, asks to delete or modify an existing deck, or requests an in-conversation quiz without creating a deck.

Input parameters:

- `backLanguage` (string): Language of the translations on the back. Set from the user’s known language; never assume English. Always set for language-learning decks. Used for reverse-card audio.
- `cards` (array, required): The complete generated deck. Include exactly the number of cards the user requested, with every required language-learning field completed; never submit a partial array or placeholders.
- `language` (string): ISO 639-1 code for the language spoken on the front side (e.g. 'zh' Chinese, 'ja' Japanese, 'vi' Vietnamese). Used for the correct audio voice and saved-deck language. Always infer and set it from th…
- `title` (string, required): A concise, descriptive title for the generated deck.

Output parameters:

- `backLanguage` (string)
- `cardCount` (integer)
- `cards` (array)
- `language` (string)
- `title` (string)

### `speak_text` (~64 tokens)

Play text as speech

Use this when the flashcard widget requests speech audio for the current card.

Input parameters:

- `language` (string, required): Language of the text being spoken. Always specify the current side’s language; never default to the other side or app preferences.
- `text` (string, required): Text to speak.

Output parameters:

- `contentType` (string)

### `create_website_deck` (~137 tokens)

Save a flashcard deck on Fulin Labs

Use this when the user explicitly asks to save or share a deck on the website, or chooses Learn on website in the study widget. It sends the supplied deck to Fulin Labs and creates a persistent shareable deck link. Anyone with the link can read the deck. Do not call merely to preview or study a deck. Repeating the call may create another deck.

Input parameters:

- `cards` (array, required): The cards the user explicitly chose to save on Fulin Labs.
- `language` (string): Optional language code for the deck's front side.
- `title` (string, required): The title of the deck the user chose to save.

Output parameters:

- `url` (string)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/aeither-flashcards/api-mcp#diagnostics

## Score history

- 2026-11-05: 73
- 2026-11-04: 73
- 2026-11-03: 72
- 2026-11-02: 72

## Common questions

### What is the Flashcards by Fulin Labs MCP server?

Flashcards by Fulin Labs is an MCP server listed in the public MCP registry as io.github.aeither/flashcards. Learn vocabulary from daily life with flashcards, examples, pronunciation and shareable study links. This page covers its hosted endpoint (https://flashcard.fulinlabs.com/api/mcp).

### Is the Flashcards by Fulin Labs MCP server safe to use?

Flashcards by Fulin Labs scores 73 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Flashcards by Fulin Labs MCP server expose?

Flashcards by Fulin Labs exposes 3 tools: create_flashcard_deck, speak_text, create_website_deck. Their descriptions and schemas cost roughly 558 tokens of context every time the server is loaded.

### Does the Flashcards by Fulin Labs MCP server require authentication?

No. We connected to Flashcards by Fulin Labs without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Flashcards by Fulin Labs MCP server still maintained?

Flashcards by Fulin Labs is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://flashcard.fulinlabs.com/api/mcp
- Repository: https://github.com/aeither/flashcards-mcp
- Website: https://flashcard.fulinlabs.com/
- Changelog RSS feed: https://verifymcp.io/servers/aeither-flashcards/api-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/aeither-flashcards/api-mcp.json
- HTML version of this page: https://verifymcp.io/servers/aeither-flashcards/api-mcp