geojp-mcp
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| GEOJP_API_KEY | Yes | Your API key for ReverseGeoJP/ChibanJP. Required to access the geocoding and parcel APIs. |
Instructions
Guidance the server publishes about itself, which clients place ahead of the tool catalog so the model reads it before choosing anything.
This server publishes no instructions, or was last inspected before Glama recorded them.
Capabilities
Features and capabilities supported by this server
Protocol revision2025-11-25
| Capability | Details |
|---|---|
| tools | {
"listChanged": true
} |
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
| reverse_geocodeA | 緯度経度から最も近い町丁目の住所（都道府県・市区町村・町域・郵便番号）を返します。ReverseGeoJP APIを使用。境界内判定ではなく最近傍点を返す点に注意。 |
| geocodeA | 日本語の住所文字列（部分一致）から、候補となる町丁目と緯度経度を最大10件返します。ReverseGeoJP APIを使用。 |
| get_parcelA | 緯度経度から、その地点を含む筆の地番・大字・市区町村・測量精度区分を返します。ChibanJP APIを使用。対応エリアは東京都・大阪府・北海道・愛知県・神奈川県・兵庫県・福岡県・長野県の8都道府県のみ。 |
| lookup_locationA | 緯度経度から、住所（ReverseGeoJP）と地番（ChibanJP）をまとめて調べます。2つの独立したAPIを並行に呼び出して1回の結果に統合します。ChibanJPは対応8都道府県外だとnot_foundになる点に注意（住所側は取得できる場合があります）。 |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
TDQS
Scored across 4 tools
Each tool has a distinct purpose: forward geocoding, reverse geocoding, parcel lookup, and a combined reverse+parcel lookup. The combined lookup overlaps slightly with reverse_geocode and get_parcel, but the description clearly explains it as a composite, minimizing ambiguity.
All tool names follow a consistent verb_noun pattern (reverse_geocode, geocode, get_parcel, lookup_location) using lowercase and underscores. While verbs vary, the naming style is uniform and predictable.
With just 4 tools, the server is tightly scoped to Japanese geocoding and parcel lookup. Each tool serves a clear and distinct need, making the count appropriate without being thin or bloated.
The tool set covers the core domain operations: forward geocoding, reverse geocoding, parcel lookup, and a combined convenience method. No significant functional gaps are apparent; limitations like 8-prefecture parcel coverage are data constraints, not missing tool capabilities.