get-stations-code-in-city

Find all railway stations and their codes in a Chinese city to simplify ticket booking and travel planning on 12306.

Instructions

通过中文城市名查询该城市所有火车站的名称及其对应的 station_code，结果是一个包含多个车站信息的列表。

Input Schema

TableJSON Schema

Name	Required	Description	Default
`city`	Yes	中文城市名称，例如："北京", "上海"

Implementation Reference

src/index.ts:847-858 (handler)

Handler function that retrieves all stations in the given city from precomputed CITY_STATIONS data and returns them as a JSON string in the response content, or an error if the city is not found.

async ({ city }) => {
    if (!(city in CITY_STATIONS)) {
        return {
            content: [{ type: 'text', text: 'Error: City not found. ' }],
        };
    }
    return {
        content: [
            { type: 'text', text: JSON.stringify(CITY_STATIONS[city]) },
        ],
    };
}

src/index.ts:844-846 (schema)
Input schema defined using Zod, specifying a required 'city' parameter as a string with description.
```
{
    city: z.string().describe('中文城市名称，例如："北京", "上海"'),
},
```

src/index.ts:841-859 (registration)

Registration of the tool using McpServer's server.tool() method, providing name, description, input schema, and handler.

server.tool(
    'get-stations-code-in-city',
    '通过中文城市名查询该城市 **所有** 火车站的名称及其对应的 `station_code`，结果是一个包含多个车站信息的列表。',
    {
        city: z.string().describe('中文城市名称，例如："北京", "上海"'),
    },
    async ({ city }) => {
        if (!(city in CITY_STATIONS)) {
            return {
                content: [{ type: 'text', text: 'Error: City not found. ' }],
            };
        }
        return {
            content: [
                { type: 'text', text: JSON.stringify(CITY_STATIONS[city]) },
            ],
        };
    }
);

src/index.ts:48-67 (helper)

Precomputed CITY_STATIONS map from city name to list of stations in that city ({station_code, station_name}), derived from global STATIONS data loaded earlier.

const CITY_STATIONS: Record<
    string,
    { station_code: string; station_name: string }[]
> = (() => {
    const result: Record<
        string,
        { station_code: string; station_name: string }[]
    > = {};
    for (const station of Object.values(STATIONS)) {
        const city = station.city;
        if (!result[city]) {
            result[city] = [];
        }
        result[city].push({
            station_code: station.station_code,
            station_name: station.station_name,
        });
    }
    return result;
})(); //以城市名名为键，位于该城市的的所有Station列表的记录

12306-mcp