Japan Rail: List Stations on a Line

heartrailsexpress/stations-on-line

Lists every station on one Japanese railway line, given the line's name in Japanese, with prefecture, coordinates, postal code and the previous and next station. Data from HeartRails Express, served by Eden Engine; not an official HeartRails product.

activeper callv1

Price

$0.0026 per call

You pay the price shown. If a call turns out to cost more than its quote, you pay the actual price, capped at twice the quote. No monthly minimum. Top-ups start at $0.50.

Data source

HeartRails Express

Railway line and station data from HeartRails Express (express.heartrails.com), whose API page asks for a credit to "HeartRails Express" where the data is used. Passed through unmodified. Served by Eden Engine; not an official HeartRails product.

Use it

Five steps: search, inspect, learn, run, settle. No per-tool setup; your agent reaches this tool through the meta-tools it already has.

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agent

// 1. search: find the tool
omnial_search({ query: "what you need" })

// 2. inspect: price and input schema
omnial_inspect({ tool: "heartrailsexpress/stations-on-line" })

// 3. learn: read the usage guide at runtime
omnial_learn({ tool: "heartrailsexpress/stations-on-line" })

// 4. run: price the exact call first, then run it
omnial_execute({ tool: "heartrailsexpress/stations-on-line", input: { /* see input_schema */ }, dry_run: true })
omnial_execute({ tool: "heartrailsexpress/stations-on-line", input: { /* ... */ } })

// 5. settle: the call is charged when it finishes, nothing to do

Not connected yet? Point your MCP client at https://mcp.eden-engine.com/mcp, then copy a config for your client.

Pricing

Every charge this tool can incur.

Charge	Price
Per call	$0.0026

Updated: Oct 21, 2026

Input and output schemas

Input schema

input_schema.json

{
  "type": "object",
  "required": [
    "line"
  ],
  "properties": {
    "line": {
      "type": "string",
      "maxLength": 40,
      "minLength": 1,
      "description": "The line name in Japanese exactly as the service spells it, for example JR山手線 or つくばエクスプレス線. Names of lines come from the line lister."
    }
  },
  "additionalProperties": false
}

Output schema

output_schema.json

{
  "type": "object",
  "required": [
    "response"
  ],
  "properties": {
    "response": {
      "type": "object",
      "required": [
        "station"
      ],
      "properties": {
        "station": {
          "type": "array",
          "items": {
            "type": "object",
            "required": [
              "name",
              "prefecture",
              "line"
            ],
            "properties": {
              "x": {
                "type": "number",
                "description": "Longitude in decimal degrees."
              },
              "y": {
                "type": "number",
                "description": "Latitude in decimal degrees."
              },
              "line": {
                "type": "string",
                "description": "The railway line, in Japanese. A station on several lines appears once per line."
              },
              "name": {
                "type": "string",
                "description": "The station name in Japanese."
              },
              "next": {
                "type": [
                  "string",
                  "null"
                ],
                "description": "The next station on the line; null at the end of a line."
              },
              "prev": {
                "type": [
                  "string",
                  "null"
                ],
                "description": "The previous station on the line; null at the end of a line."
              },
              "postal": {
                "type": "string",
                "description": "The seven-digit postal code of the station."
              },
              "distance": {
                "type": "string",
                "description": "Only for the nearest-stations lookup: the distance from the given point, such as `320m`."
              },
              "prefecture": {
                "type": "string",
                "description": "The prefecture, in Japanese."
              }
            },
            "additionalProperties": true
          },
          "description": "The stations found; empty when none match."
        }
      },
      "additionalProperties": true
    }
  },
  "additionalProperties": true
}