Geomelon地理API用のMCPサーバー。都市、国、地域、言語を、MCP互換のAIクライアントが呼び出せるツールとして公開します。
2つのトランスポートが含まれています：
バイナリ | トランスポート | ユースケース |
| stdio | ローカルクライアント — Claude Desktop, Cursor, Cline, Continue |
| HTTP (ストリーミング可能) | リモート / ホスト型サーバー |
Node.js 18以上
Geomelon APIをサブスクライブしたRapidAPIキー
Related MCP server: bamwor-mcp-server
.env.example を .env にコピーし、キーを入力してください：
cp .env.example .envGEOMELON_API_KEY=your_rapidapi_key_here
PORT=3000 # HTTP transport only~/Library/Application Support/Claude/claude_desktop_config.json に以下を追加します：
{
"mcpServers": {
"geomelon": {
"command": "npx",
"args": ["-y", "geomelon-mcp"],
"env": {
"GEOMELON_API_KEY": "your_rapidapi_key_here"
}
}
}
}エディタのMCP設定に追加します（正確なパスはエディタによって異なります）：
{
"geomelon": {
"command": "npx",
"args": ["-y", "geomelon-mcp"],
"env": {
"GEOMELON_API_KEY": "your_rapidapi_key_here"
}
}
}サーバーを起動します：
GEOMELON_API_KEY=your_key PORT=3000 npx geomelon-mcp-http次に、MCPクライアントを http://your-host:3000/mcp に向けます。
HTTPトランスポートはステートレスです。各リクエストは独立しており、管理するセッションはありません。
ツール | 説明 |
| 名前、国コード、地域、人口範囲、並び順で検索 |
| UUIDによる都市の詳細情報 |
| 緯度/経度に近い都市を距離順に取得 |
| 緯度/経度に近い都市を人口順に取得 |
| 2都市間の距離（km） |
ツール | 説明 |
| すべての国を一覧表示、電話番号の国番号でフィルタリング |
| UUIDによる国の詳細情報（翻訳や地域を含む） |
ツール | 説明 |
| 地域を一覧表示、国のUUIDでフィルタリング |
| UUIDによる地域の詳細情報 |
ツール | 説明 |
| データベース内のすべての言語を一覧表示 |
| UUIDによる言語の詳細情報 |
npm install
npm run build # compile TypeScript → dist/stdioサーバーを直接実行：
GEOMELON_API_KEY=your_key node dist/stdio.jsHTTPサーバーを直接実行：
GEOMELON_API_KEY=your_key PORT=3000 node dist/http.jsSearch cities using a country name instead of an ISO code. Resolves the country first, then searches cities within it.
| Name | Required | Description | Default |
|---|---|---|---|
| name | No | City name prefix to filter by | |
| sort | No | Sort order | |
| limit | No | Max results (default 20) | |
| offset | No | Pagination offset | |
| countryName | Yes | Country name prefix (e.g. "France", "United States") | |
| maxPopulation | No | Maximum population | |
| minPopulation | No | Minimum population | |
| preferredLanguages | No | Comma-separated BCP 47 language tags |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations declare readOnlyHint=true, so the description's mention of 'Resolves the country first' adds some behavioral context but does not provide additional safety or limitation details. Description does not contradict annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Two concise sentences that directly describe the tool's core purpose without any redundant or extraneous information.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Description gives a high-level overview of the two-step process (resolve country, search cities) but does not mention pagination or return format despite pagination parameters existing. Adequate but could be more complete.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, so all parameters are described there. The description does not add meaning beyond the schema, but baseline is 3 due to high coverage.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
Description clearly states the verb 'search' and resource 'cities', and specifies the mechanism: using a country name instead of an ISO code. It distinguishes the tool's function clearly despite no siblings listed.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description implies the tool is for searching cities by country name (as opposed to ISO code), providing some context. However, it does not explicitly state when to use or avoid this tool, nor does it reference alternatives.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
v1.1.1cities_by_coordinates_closestcities_by_coordinates_largestcities_distancecity_contextcompare_citiescountry_overviewfind_cities_near_cityget_cityget_city_settlement_typesget_city_translationsget_countryget_country_regionsget_country_translationsget_languageget_regionget_region_translationslist_countrieslist_languageslist_regionssearch_citiesv1.0.9cities_by_coordinates_closestcities_by_coordinates_largestcities_distancecity_contextcompare_citiescountry_overviewfind_cities_near_cityget_cityget_city_settlement_typesget_city_translationsget_countryget_country_regionsget_country_translationsget_languageget_regionget_region_translationslist_countrieslist_languageslist_regionssearch_citiessearch_cities_in_countrycities_by_coordinates_closestcities_by_coordinates_largestcities_distancecity_contextcompare_citiescountry_overviewfind_cities_near_cityget_cityget_city_settlement_typesget_city_translationsget_countryget_country_regionsget_country_translationsget_languageget_regionget_region_translationslist_countrieslist_languageslist_regionssearch_citiessearch_cities_in_countryv1.0.8cities_by_coordinates_closestcities_by_coordinates_largestcities_distancecity_contextcompare_citiescountry_overviewfind_cities_near_cityget_cityget_city_settlement_typesget_city_translationsget_countryget_country_regionsget_country_translationsget_languageget_regionget_region_translationslist_countrieslist_languageslist_regionssearch_citiessearch_cities_in_countryScored across 1 tool
With only one tool, there is no risk of confusion or overlap with other tools.
The single tool name follows a clear verb_noun pattern (search_cities_in_country), which is consistent and descriptive.
A single tool feels thin for a geographic data server; while it serves a specific purpose, users might expect more capabilities like listing countries or city details.
The tool only allows searching cities by country name, missing essential operations like retrieving city details, listing countries, or reverse lookups, making the surface severely incomplete.
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