Flashcards by Fulin Labs
REMOTE · FLASHCARD.FULINLABS.COM
Learn vocabulary from daily life with flashcards, examples, pronunciation and shareable study links.
Available components
Last scanned (23 hours ago)
Scores higher than 60% of remote servers
Reachable. Last reached 4 Nov 2026.
Category Education and Research
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. How we score → Why this is hard to score →
Endpoint Security80
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability73
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (good).Pass
- 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. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management7
- Stability observed for 2 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities73
- Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28. See how to fix → Fail
- Supports UI / widget rendering.Pass
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 4 Nov 26 +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.
- 3 Nov 26 0
- Stability: unverified → 0.03 ▲ functional
- 2 Nov 26 72
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 4 Nov 2026 · Probed https://flashcard.fulinlabs.com/api/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=flashcard.fulinlabs.com | CN=YR1,O=Let's Encrypt,C=US | 5 Sept 2026 | 4 Dec 2026 | RSA 2048 | SHA256-RSA | 630638747e576a394f3b069646a594a983b |
| SANs: flashcard.fulinlabs.com | ||||||
| CN=YR1,O=Let's Encrypt,C=US (CA) | CN=Root YR,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | RSA 2048 | SHA256-RSA | a20253f15f2691c05dc1ce13b9bcca4e |
| CN=Root YR,O=ISRG,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | RSA 4096 | SHA256-RSA | f24b6d17f9d9ad7cb1c9fea78782699f |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of flashcard.fulinlabs.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| fulinlabs.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=63072000 |
| x-content-type-options | nosniff |
| referrer-policy | strict-origin-when-cross-origin |
| permissions-policy | camera=(), geolocation=(), payment=(), usb=(), interest-cohort=() |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://flashcard.fulinlabs.com/api/mcp | Verified | 200 | |
| http (plaintext) | http://flashcard.fulinlabs.com/api/mcp | HTTPS enforced | 308 | https://flashcard.fulinlabs.com/api/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
create_flashcard_deck Create and study flashcards ~357
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.
| Name | Type | Req | Description |
|---|---|---|---|
| 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 | yes | 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 | yes | A concise, descriptive title for the generated deck. |
| Name | Type | Req | Description |
|---|---|---|---|
| backLanguage | string | – | – |
| cardCount | integer | yes | – |
| cards | array | yes | – |
| language | string | – | – |
| title | string | yes | – |
No examples provided.
create_website_deck Save a flashcard deck on Fulin Labs ~137
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.
| Name | Type | Req | Description |
|---|---|---|---|
| cards | array | yes | The cards the user explicitly chose to save on Fulin Labs. |
| language | string | – | Optional language code for the deck's front side. |
| title | string | yes | The title of the deck the user chose to save. |
| Name | Type | Req | Description |
|---|---|---|---|
| url | string | yes | – |
No examples provided.
speak_text Play text as speech ~64
Use this when the flashcard widget requests speech audio for the current card.
| Name | Type | Req | Description |
|---|---|---|---|
| language | string | yes | Language of the text being spoken. Always specify the current side’s language; never default to the other side or app preferences. |
| text | string | yes | Text to speak. |
| Name | Type | Req | Description |
|---|---|---|---|
| contentType | string | yes | – |
No examples provided.
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.
remote · flashcard.fulinlabs.com
claude mcp add --transport http aeither-flashcards 'https://flashcard.fulinlabs.com/api/mcp'
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 4 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.