Koskamo

Japanese Skills MCP

A read-only MCP server providing tools to look up Japanese vocabulary, kanji, and grammar points, list free courses, and access generated audio recordings for JLPT learners.

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Japanese Skills MCP logo, by Japanese SkillsCommunity listingStreamable HTTPNo sign-inEndpoint checked 2026-11-01Published by Japanese Skills
MCP endpoint (Streamable HTTP)
https://japaneseskills.com/mcp
Vendor documentation

What you can do with it

  • Look up Japanese words by kanji, kana, or meaning
  • Find grammar points by pattern or meaning
  • List available free courses and JLPT practice levels
  • Access generated audio for vocabulary and grammar examples

Source and maintenance

Community listingRegistry 1.0.0
mcp-registry: io.github.Keith-CY/japaneseskills-mcp@1.0.0Project website

Protocol and capabilities

Server
japaneseskills 1.0.0
MCP protocol
2025-06-18
Tools
4 advertised
Resources
1 advertised
Resource templates
0 advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {
    "listChanged": false
  },
  "resources": {
    "listChanged": false
  },
  "extensions": {
    "io.modelcontextprotocol/ui": {}
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

Japanese Skills · 言の葉 (japaneseskills.com) is a Japanese study site from kana to JLPT N1, with its interface in Simplified Chinese, Traditional Chinese, English and Korean. These tools read its study library: 9,040 JLPT words (N5–N1) with readings, pitch accents, word classes, conjugation tables, example sentences and the site’s recordings in two voices; 828 grammar points with examples and their recordings; and the list of its JLPT practice levels and courses. They fit when a user is learning Japanese and asks what a Japanese word means or how to read, pronounce or conjugate it; which words use a kanji; what a grammar pattern means or how to say something with it; or how to study for a JLPT level. Use lookup_word for a word (Japanese, romaji, or a meaning in the user’s language), lookup_kanji for a kanji, find_grammar for a grammar point, and list_courses for the site’s JLPT practice levels and courses. If nothing fits, answer without these tools. Pass lang for the user’s language: "zh-Hans" (Simplified Chinese), "zh-Hant" (Traditional Chinese), "en" (English) or "ko" (Korean); other languages get English. Answer in the user’s language. When an answer draws on a result, link its page (url) and name the site, Japanese Skills · 言の葉. Word meanings come from JMdict (EDRDG, CC BY-SA 4.0) and pitch accents from Kanjium (CC BY-SA 4.0); results say so. 中文：用户学日语，问某个日语词的意思、读音、高低音、变形，某个汉字用在哪些词里，某个语法句型的意思和例句，或者怎么准备 JLPT 时适用。lang 传 "zh-Hans"（简体）或 "zh-Hant"（繁体）。

Tools

4 advertised

lookup_word — Look up a Japanese word
Advertised by the server during the last successful anonymous check.
Advertised read-only

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.

lookup_word input schema
{
  "type": "object",
  "required": [
    "query"
  ],
  "properties": {
    "lang": {
      "enum": [
        "zh-Hans",
        "zh-Hant",
        "en",
        "ko"
      ],
      "type": "string",
      "description": "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": {
      "enum": [
        "N5",
        "N4",
        "N3",
        "N2",
        "N1"
      ],
      "type": "string",
      "description": "Only this JLPT level."
    },
    "limit": {
      "type": "integer",
      "default": 3,
      "maximum": 10,
      "minimum": 1,
      "description": "How many matches to return at most."
    },
    "query": {
      "type": "string",
      "maxLength": 100,
      "minLength": 1,
      "description": "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)."
    }
  },
  "additionalProperties": false
}
lookup_word output schema
{
  "type": "object",
  "required": [
    "query",
    "lang",
    "results"
  ],
  "properties": {
    "lang": {
      "enum": [
        "zh-Hans",
        "zh-Hant",
        "en",
        "ko"
      ],
      "type": "string"
    },
    "site": {
      "type": "string"
    },
    "query": {
      "type": "string"
    },
    "credit": {
      "type": "string"
    },
    "results": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "word",
          "reading",
          "level",
          "meaning",
          "pitch",
          "audio",
          "picture",
          "url"
        ],
        "properties": {
          "url": {
            "type": "string",
            "description": "The word’s page"
          },
          "word": {
            "type": "string"
          },
          "audio": {
            "type": [
              "object",
              "null"
            ],
            "required": [
              "voice1",
              "voice2"
            ],
            "properties": {
              "voice1": {
                "type": [
                  "string",
                  "null"
                ]
              },
              "voice2": {
                "type": [
                  "string",
                  "null"
                ]
              }
            },
            "description": "Recordings of the site’s two voices, or null when there is none"
          },
          "forms": {
            "type": "object",
            "required": [
              "code",
              "family",
              "name",
              "groups"
            ],
            "properties": {
              "aff": {
                "type": "string"
              },
              "neg": {
                "type": "string"
              },
              "code": {
                "type": "string",
                "description": "JMdict word class"
              },
              "name": {
                "type": "string"
              },
              "note": {
                "type": "string"
              },
              "family": {
                "type": "string"
              },
              "groups": {
                "type": "array",
                "items": {
                  "type": "object",
                  "required": [
                    "name",
                    "rows"
                  ],
                  "properties": {
                    "name": {
                      "type": "string"
                    },
                    "rows": {
                      "type": "array",
                      "items": {
                        "type": "object",
                        "required": [
                          "key",
                          "label",
                          "affirmative",
                          "negative"
                        ],
                        "properties": {
                          "ja": {
                            "type": "string"
                          },
                          "key": {
                            "type": "string"
                          },
                          "label": {
                            "type": "string"
                          },
                          "negative": {
                            "type": [
                              "object",
                              "null"
                            ],
                            "required": [
                              "written"
                            ],
                            "properties": {
                              "reading": {
                                "type": "string"
                              },
                              "written": {
                                "type": "string"
                              }
                            }
                          },
                          "affirmative": {
                            "type": [
                              "object",
                              "null"
                            ],
                            "required": [
                              "written"
                            ],
                            "properties": {
                              "reading": {
                                "type": "string"
                              },
                              "written": {
                                "type": "string"
                              }
                            }
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          },
          "level": {
            "type": "string",
            "description": "JLPT level: N5 (easiest) to N1"
          },
          "pitch": {
            "type": "array",
            "items": {
              "type": "object",
              "required": [
                "reading",
                "accent",
                "morae",
                "pattern",
                "type",
                "typeName"
              ],
              "properties": {
                "also": {
                  "type": "array",
                  "items": {
                    "type": "integer"
                  }
                },
                "type": {
                  "enum": [
                    "heiban",
                    "atamadaka",
                    "nakadaka",
                    "odaka"
                  ],
                  "type": "string"
                },
                "morae": {
                  "type": "array",
                  "items": {
                    "type": "string"
                  }
                },
                "accent": {
                  "type": "integer"
                },
                "pattern": {
                  "type": "string",
                  "description": "H/L per mora, then the particle after the word in brackets"
                },
                "reading": {
                  "type": "string"
                },
                "typeName": {
                  "type": "string"
                }
              }
            }
          },
          "example": {
            "type": "object",
            "required": [
              "japanese",
              "translation",
              "audio"
            ],
            "properties": {
              "audio": {
                "type": [
                  "object",
                  "null"
                ],
                "required": [
                  "voice1",
                  "voice2"
                ],
                "properties": {
                  "voice1": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "voice2": {
                    "type": [
                      "string",
                      "null"
                    ]
                  }
                },
                "description": "Recordings of the site’s two voices, or null when there is none"
              },
              "japanese": {
                "type": "string"
              },
              "translation": {
                "type": "string"
              }
            }
          },
          "meaning": {
            "type": "string",
            "description": "Senses separated by semicolons"
          },
          "picture": {
            "type": [
              "string",
              "null"
            ]
          },
          "reading": {
            "type": "string"
          },
          "keyForms": {
            "type": "array",
            "items": {
              "type": "object",
              "required": [
                "key",
                "side",
                "label",
                "written"
              ],
              "properties": {
                "ja": {
                  "type": "string"
                },
                "key": {
                  "type": "string"
                },
                "side": {
                  "enum": [
                    "affirmative",
                    "negative"
                  ],
                  "type": "string"
                },
                "label": {
                  "type": "string"
                },
                "reading": {
                  "type": "string"
                },
                "written": {
                  "type": "string"
                }
              }
            }
          }
        }
      }
    }
  }
}
lookup_word annotations
{
  "title": "Look up a Japanese word",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
lookup_kanji — Words that use a kanji
Advertised by the server during the last successful anonymous check.
Advertised read-only

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.

lookup_kanji input schema
{
  "type": "object",
  "required": [
    "kanji"
  ],
  "properties": {
    "lang": {
      "enum": [
        "zh-Hans",
        "zh-Hant",
        "en",
        "ko"
      ],
      "type": "string",
      "description": "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."
    },
    "kanji": {
      "type": "string",
      "maxLength": 20,
      "minLength": 1,
      "description": "One to five kanji, e.g. \"生\" or \"日本\"."
    },
    "limit": {
      "type": "integer",
      "default": 8,
      "maximum": 20,
      "minimum": 1,
      "description": "How many words to list per kanji at most."
    }
  },
  "additionalProperties": false
}
lookup_kanji output schema
{
  "type": "object",
  "required": [
    "kanji",
    "lang",
    "results"
  ],
  "properties": {
    "lang": {
      "enum": [
        "zh-Hans",
        "zh-Hant",
        "en",
        "ko"
      ],
      "type": "string"
    },
    "kanji": {
      "type": "string"
    },
    "credit": {
      "type": "string"
    },
    "results": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "kanji",
          "count",
          "lowestLevel",
          "words",
          "lessons"
        ],
        "properties": {
          "count": {
            "type": "integer"
          },
          "kanji": {
            "type": "string"
          },
          "words": {
            "type": "array",
            "items": {
              "type": "object",
              "required": [
                "word",
                "reading",
                "level",
                "meaning",
                "url"
              ],
              "properties": {
                "url": {
                  "type": "string"
                },
                "word": {
                  "type": "string"
                },
                "level": {
                  "type": "string",
                  "description": "JLPT level: N5 (easiest) to N1"
                },
                "meaning": {
                  "type": "string"
                },
                "reading": {
                  "type": "string"
                }
              }
            }
          },
          "lessons": {
            "type": "array",
            "items": {
              "type": "object",
              "required": [
                "course",
                "lesson",
                "title",
                "free",
                "url"
              ],
              "properties": {
                "url": {
                  "type": "string"
                },
                "free": {
                  "type": "boolean",
                  "description": "false: needs a subscription or pass"
                },
                "title": {
                  "type": "string"
                },
                "course": {
                  "type": "string"
                },
                "lesson": {
                  "type": "integer"
                }
              }
            }
          },
          "lowestLevel": {
            "type": [
              "string",
              "null"
            ]
          }
        }
      }
    }
  }
}
lookup_kanji annotations
{
  "title": "Words that use a kanji",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
find_grammar — Find a Japanese grammar point
Advertised by the server during the last successful anonymous check.
Advertised read-only

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.

find_grammar input schema
{
  "type": "object",
  "required": [
    "query"
  ],
  "properties": {
    "lang": {
      "enum": [
        "zh-Hans",
        "zh-Hant",
        "en",
        "ko"
      ],
      "type": "string",
      "description": "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": {
      "enum": [
        "N5",
        "N4",
        "N3",
        "N2",
        "N1"
      ],
      "type": "string",
      "description": "Only this JLPT level."
    },
    "limit": {
      "type": "integer",
      "default": 4,
      "maximum": 10,
      "minimum": 1,
      "description": "How many grammar points to return at most."
    },
    "query": {
      "type": "string",
      "maxLength": 100,
      "minLength": 1,
      "description": "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)."
    }
  },
  "additionalProperties": false
}
find_grammar output schema
{
  "type": "object",
  "required": [
    "query",
    "lang",
    "results",
    "lessons"
  ],
  "properties": {
    "lang": {
      "enum": [
        "zh-Hans",
        "zh-Hant",
        "en",
        "ko"
      ],
      "type": "string"
    },
    "query": {
      "type": "string"
    },
    "lessons": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "course",
          "lesson",
          "title",
          "free",
          "url"
        ],
        "properties": {
          "url": {
            "type": "string"
          },
          "free": {
            "type": "boolean",
            "description": "false: needs a subscription or pass"
          },
          "title": {
            "type": "string"
          },
          "course": {
            "type": "string"
          },
          "lesson": {
            "type": "integer"
          }
        }
      }
    },
    "results": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "pattern",
          "level",
          "meaning",
          "url"
        ],
        "properties": {
          "url": {
            "type": "string",
            "description": "The grammar point on its page"
          },
          "name": {
            "type": "string"
          },
          "level": {
            "type": "string"
          },
          "example": {
            "type": "object",
            "required": [
              "japanese",
              "translation",
              "audio"
            ],
            "properties": {
              "audio": {
                "type": [
                  "object",
                  "null"
                ],
                "required": [
                  "voice1",
                  "voice2"
                ],
                "properties": {
                  "voice1": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "voice2": {
                    "type": [
                      "string",
                      "null"
                    ]
                  }
                },
                "description": "Recordings of the site’s two voices, or null when there is none"
              },
              "japanese": {
                "type": "string"
              },
              "translation": {
                "type": "string"
              }
            }
          },
          "meaning": {
            "type": "string"
          },
          "pattern": {
            "type": "string"
          }
        }
      }
    }
  }
}
find_grammar annotations
{
  "title": "Find a Japanese grammar point",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
list_courses — JLPT levels and courses
Advertised by the server during the last successful anonymous check.
Advertised read-only

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.

list_courses input schema
{
  "type": "object",
  "properties": {
    "lang": {
      "enum": [
        "zh-Hans",
        "zh-Hant",
        "en",
        "ko"
      ],
      "type": "string",
      "description": "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."
    },
    "course": {
      "type": "string",
      "maxLength": 20,
      "description": "A course id from this tool’s list (e.g. \"n5\", \"kanji\", \"keigo\") to list its lessons."
    }
  },
  "additionalProperties": false
}
list_courses output schema
{
  "type": "object",
  "required": [
    "lang"
  ],
  "properties": {
    "jlpt": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "level",
          "questions",
          "free"
        ],
        "properties": {
          "url": {
            "type": "string"
          },
          "free": {
            "type": "boolean",
            "description": "false: needs a subscription or pass"
          },
          "level": {
            "type": "string"
          },
          "questions": {
            "type": "integer"
          }
        }
      }
    },
    "lang": {
      "enum": [
        "zh-Hans",
        "zh-Hant",
        "en",
        "ko"
      ],
      "type": "string"
    },
    "course": {
      "type": "object",
      "required": [
        "id",
        "title",
        "level",
        "summary",
        "url",
        "lessons"
      ],
      "properties": {
        "id": {
          "type": "string"
        },
        "url": {
          "type": "string"
        },
        "level": {
          "type": "string"
        },
        "title": {
          "type": "string"
        },
        "lessons": {
          "type": "array",
          "items": {
            "type": "object",
            "required": [
              "lesson",
              "title",
              "free",
              "url"
            ],
            "properties": {
              "url": {
                "type": "string"
              },
              "free": {
                "type": "boolean",
                "description": "false: needs a subscription or pass"
              },
              "level": {
                "type": "string"
              },
              "title": {
                "type": "string"
              },
              "lesson": {
                "type": "integer"
              }
            }
          }
        },
        "summary": {
          "type": "string"
        }
      },
      "description": "With course: that course and its lessons"
    },
    "courses": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "id",
          "title",
          "level",
          "lessons",
          "freeLessons",
          "url"
        ],
        "properties": {
          "id": {
            "type": "string",
            "description": "Pass as course to list the lessons"
          },
          "url": {
            "type": "string"
          },
          "level": {
            "type": "string"
          },
          "title": {
            "type": "string"
          },
          "lessons": {
            "type": "integer"
          },
          "freeLessons": {
            "type": "integer"
          }
        }
      }
    },
    "library": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "name",
          "count",
          "url"
        ],
        "properties": {
          "url": {
            "type": "string"
          },
          "name": {
            "type": "string"
          },
          "count": {
            "type": "integer"
          }
        }
      }
    },
    "coursesUrl": {
      "type": "string"
    },
    "studyRoute": {
      "type": "string"
    }
  }
}
list_courses annotations
{
  "title": "JLPT levels and courses",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

1 advertised

japaneseskills-word-card — Japanese word card

Advertised by the server during the last successful anonymous check.

A Japanese word from japaneseskills.com: reading with pitch accent, meaning, word forms, an example and the site’s recordings.

japaneseskills-word-card URI
ui://japaneseskills/word-card-v2.html

MIME type: text/html;profile=mcp-app

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks
1 of 1 (100%)
Average latency
572 ms
95th percentile latency
572 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 572 ms · metadata changed · 4 tool(s), 1 resource(s), 0 resource template(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http japanese-skills-mcp https://japaneseskills.com/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).
Codex configuration
codex mcp add japanese-skills-mcp --url https://japaneseskills.com/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable japanese-skills-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "japanese-skills-mcp": {
      "url": "https://japaneseskills.com/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "japanese-skills-mcp": {
      "type": "streamableHttp",
      "url": "https://japaneseskills.com/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start japanese-skills-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "japanese-skills-mcp": {
      "type": "http",
      "url": "https://japaneseskills.com/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.
Gemini CLI configuration
gemini mcp add --transport http japanese-skills-mcp https://japaneseskills.com/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.
Claude Desktop configuration
{
  "mcpServers": {
    "japanese-skills-mcp": {
      "url": "https://japaneseskills.com/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.
Windsurf configuration
{
  "mcpServers": {
    "japanese-skills-mcp": {
      "serverUrl": "https://japaneseskills.com/mcp"
    }
  }
}

Let your agent find its tools

Find servers like Japanese Skills MCP from your agent. Add Koskamo once to search the index for endpoints, access requirements, and client setup. Public discovery needs no key.

Connect Koskamo Explore workflows
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