Japanese Skills · 言の葉
REMOTE · JAPANESESKILLS.COM
Japanese words with pitch accent and conjugation, kanji and grammar for JLPT learners.
Available components
Last scanned (7 hours ago)
Scores higher than 66% of remote servers
Reachable. Last reached 5 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 Security74
- 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
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- 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 Usability75
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 1558 tokens (~311/item across 5 items; 4 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 Management33
- Stability observed for 10 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 4 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a current MCP spec version (2026-07-28).Pass
- 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.
- 5 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 30 to 33. That category is still filling its 30-day observation window: 9 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes.
- 3 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.
- 1 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.
- 29 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.
- 28 Oct 26 0
- Resource “japaneseskills-word-card” now points somewhere else: ui://japaneseskills/word-card-v1.html → ui://japaneseskills/word-card-v2.html security
- The server rewrote its instructions, which are the text every model session reads security
- 27 Oct 26 +1
- The server rewrote its instructions, which are the text every model session reads security
- Tool “find_grammar” rewrote its description, which is the text the model reads security
- Tool “list_courses” rewrote its description, which is the text the model reads security
- Tool “lookup_kanji” rewrote its description, which is the text the model reads security
- Tool “lookup_word” rewrote its description, which is the text the model reads security
- Stability: unverified → 0.03 ▲ functional
- Tool “find_grammar” now declares an output schema ▲ functional
- Tool “list_courses” now declares an output schema ▲ functional
- Tool “lookup_kanji” now declares an output schema ▲ functional
- Tool “lookup_word” now declares an output schema ▲ functional
- First check of Tool coverage: 100 functional
- 26 Oct 26 71
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 5 Nov 2026 · Probed https://japaneseskills.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=japaneseskills.com | CN=WE1,O=Google Trust Services,C=US | 9 Oct 2026 | 7 Jan 2027 | ECDSA 256 | ECDSA-SHA256 | 4174b2e98fb620310e1f17a6b9bb8f87 |
| SANs: japaneseskills.com | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of japaneseskills.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| japaneseskills.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 |
|---|---|
| x-content-type-options | nosniff |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://japaneseskills.com/mcp | Verified | 200 | |
| http (plaintext) | http://japaneseskills.com/mcp | HTTPS enforced | 301 | https://japaneseskills.com/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 →
find_grammar Find a Japanese grammar point ~281
Use this when the user asks about a Japanese grammar pattern or particle (〜てもいい, ために, ば vs たら, は and が), what it means, how it is used, an example of it, or how to say something with a pattern. Searches the site’s 828 grammar points (N5–N1) by the pattern in Japanese or romaji, or by its meaning in the user’s language. Each result has the pattern, JLPT level, meaning in the user’s language, an example sentence with translation, a recording of the example where available, and the grammar page; plus the site’s course lessons whose titles match, with links and whether each is free or needs a subscription or pass.
| Name | Type | Req | Description |
|---|---|---|---|
| lang | string | – | The user’s language for meanings, labels and links: zh-Hans (Simplified Chinese), zh-Hant (Traditional Chinese), en (English) or ko (Korean). Other languages: en. Default: guessed from the query. |
| level | string | – | Only this JLPT level. |
| limit | integer | – | How many grammar points to return at most. |
| query | string | yes | The pattern (てもいい, 〜ために, te mo ii) or what it expresses in the user’s language (permission, “in order to”, 为了). |
| Name | Type | Req | Description |
|---|---|---|---|
| lang | string | yes | – |
| lessons | array | yes | – |
| query | string | yes | – |
| results | array | yes | – |
No examples provided.
list_courses JLPT levels and courses ~202
Use this when the user asks how to study Japanese or prepare for a JLPT level with Japanese Skills · 言の葉, or what study material the site has. Lists the study library (sections, counts and links), the JLPT practice levels (number of questions; links for the free ones), and the 15 courses with their level, number of lessons and link. With course, lists that course’s lessons with titles and links. Each level, course and lesson is labelled free or needs a subscription or pass.
| Name | Type | Req | Description |
|---|---|---|---|
| course | string | – | A course id from this tool’s list (e.g. "n5", "kanji", "keigo") to list its lessons. |
| lang | string | – | The user’s language for meanings, labels and links: zh-Hans (Simplified Chinese), zh-Hant (Traditional Chinese), en (English) or ko (Korean). Other languages: en. Default: guessed from the query. |
| Name | Type | Req | Description |
|---|---|---|---|
| course | object | – | With course: that course and its lessons |
| courses | array | – | – |
| coursesUrl | string | – | – |
| jlpt | array | – | – |
| lang | string | yes | – |
| library | array | – | – |
| studyRoute | string | – | – |
No examples provided.
lookup_kanji Words that use a kanji ~253
Use this when the user asks about a kanji (a Chinese character used in Japanese): which JLPT words use it and how it is read in them, at which JLPT level it first appears, or where to learn it. For each kanji given (up to five), lists the words in the site’s JLPT word list that contain it, easiest level first, with reading, level and meaning in the user’s language; how many words use it and the lowest level among them; and the site’s kanji lessons that teach it (title, link, and whether each is free or needs a subscription or pass). Gives no on’yomi/kun’yomi table or stroke order: the readings are those of the words.
| Name | Type | Req | Description |
|---|---|---|---|
| kanji | string | yes | One to five kanji, e.g. "生" or "日本". |
| lang | string | – | The user’s language for meanings, labels and links: zh-Hans (Simplified Chinese), zh-Hant (Traditional Chinese), en (English) or ko (Korean). Other languages: en. Default: guessed from the query. |
| limit | integer | – | How many words to list per kanji at most. |
| Name | Type | Req | Description |
|---|---|---|---|
| credit | string | – | – |
| kanji | string | yes | – |
| lang | string | yes | – |
| results | array | yes | – |
No examples provided.
lookup_word Look up a Japanese word ~358
Use this when the user asks about a Japanese word: what it means, how to read or pronounce it, its pitch accent, whether it is a godan or ichidan verb, how to conjugate it (te-form, past, polite, potential…), or how to say something in Japanese. Searches the 9,040 JLPT words (N5–N1) of Japanese Skills · 言の葉 by the word in kanji or kana (食べる, たべる), romaji (taberu), or a meaning in English, Chinese or Korean (eat, 吃, 먹다). Each result has the reading, JLPT level, the meaning in the user’s language, the pitch accent (accent number, type and H/L pattern), the word class and conjugation table where the site has one, an example sentence with its translation where the site has one, recordings in two voices where available, and the word’s page. Shows a word card in chats that display app UI. Returns no results when the word is not in the list. Not for translating whole sentences.
| Name | Type | Req | Description |
|---|---|---|---|
| lang | string | – | The user’s language for meanings, labels and links: zh-Hans (Simplified Chinese), zh-Hant (Traditional Chinese), en (English) or ko (Korean). Other languages: en. Default: guessed from the query. |
| level | string | – | Only this JLPT level. |
| limit | integer | – | How many matches to return at most. |
| query | string | yes | One word: Japanese (食べる, たべる, タベル), romaji (taberu), or a meaning in the user’s language (eat, 吃, 먹다). |
| Name | Type | Req | Description |
|---|---|---|---|
| credit | string | – | – |
| lang | string | yes | – |
| query | string | yes | – |
| results | array | yes | – |
| site | string | – | – |
No examples provided.
How do I install the Japanese Skills · 言の葉 MCP server?
Japanese Skills · 言の葉 is a hosted endpoint at https://japaneseskills.com/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 · japaneseskills.com
claude mcp add --transport http keith-cy-japaneseskills-mcp 'https://japaneseskills.com/mcp'
What is the Japanese Skills · 言の葉 MCP server?
Japanese Skills · 言の葉 is an MCP server listed in the public MCP registry as io.github.Keith-CY/japaneseskills-mcp. Japanese words with pitch accent and conjugation, kanji and grammar for JLPT learners. This page covers its hosted endpoint (https://japaneseskills.com/mcp).
Is the Japanese Skills · 言の葉 MCP server safe to use?
Japanese Skills · 言の葉 scores 76 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 Japanese Skills · 言の葉 MCP server expose?
Japanese Skills · 言の葉 exposes 4 tools: lookup_word, lookup_kanji, find_grammar, list_courses. Their descriptions and schemas cost roughly 1,094 tokens of context every time the server is loaded.
Does the Japanese Skills · 言の葉 MCP server require authentication?
No. We connected to Japanese Skills · 言の葉 without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Japanese Skills · 言の葉 MCP server still maintained?
Japanese Skills · 言の葉 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.