# transport-rest.transit.departures

Get real-time upcoming departures (line, direction, platform, delay) for a Berlin/Brandenburg transit stop within a time window. Stop ID comes from transport-rest.transit.search_locations or transport-rest.transit.nearby_stops. Data: v6.bvg.transport.rest (community HAFAS wrapper for BVG), no auth required, 100 req/min.

Agent View of the PolicyLayer registry record for `transport-rest.transit.departures`. HTML page: https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/transport-rest.transit.departures

## Facts

- Tool: `transport-rest.transit.departures`
- Server: Apibase (`apibase-mcp-client`) — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase.md
- Install: `npx -y apibase-mcp-client`
- Homepage: https://github.com/whiteknightonhorse/APIbase
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 4 (1 required)
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `when` | string | no | ISO 8601 date-time to fetch departures for instead of now (e.g. "2026-09-01T08:00:00+02:00"). |
| `results` | integer | no | Maximum number of departures to return (default 20, max 100). |
| `stop_id` | string | yes | Stop/station ID to fetch departures for, obtained from transport-rest.location_search or transport-rest.nearby_stops (e.g. "900100003"). |
| `duration_minutes` | integer | no | Time window in minutes to look ahead for departures (default 60, max 180). |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "transport-rest.transit.departures",
    "arguments": {
      "stop_id": "<stop_id>"
    }
  }
}
```

## Why transport-rest.transit.departures is rated Low

Tool retrieves transit schedule data with no side effects, modifications, or external state changes.

From the tool's own definition: "Get real-time upcoming departures (line, direction, platform, delay) for a transit stop"

## Use case

AI agents call transport-rest.transit.departures to retrieve information from Apibase without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Apibase:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "transport-rest.transit.departures": {}
  }
}
```

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## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=io-github-whiteknightonhorse-apibase · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-whiteknightonhorse-apibase