# unhabitat.urban.transport_access

Retrieve city-level data on the proportion of urban population with convenient access to public transport (SDG indicator 11.2.1). Covers 1,555 cities across all world regions from the UN-Habitat Urban Indicators Database. Filter by country, city name, or UN region. Returns access percentage and estimate source per city. Useful for urban mobility analysis, SDG 11 reporting, and comparing public transit equity across cities.

Agent View of the PolicyLayer registry record for `unhabitat.urban.transport_access`. HTML page: https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/unhabitat.urban.transport-access

## Facts

- Tool: `unhabitat.urban.transport_access`
- 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
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `city` | string | no | Filter by city name (partial match, e.g. "Nairobi", "Lagos", "Mumbai"). Case-insensitive. |
| `limit` | integer | no | Maximum number of cities to return (1–100, default 50). |
| `region` | string | no | Filter by UN-Habitat region (partial match). Regions include "Sub-Saharan Africa", "Northern America and Europe", "Eastern and South-Eastern Asia", "Central and |
| `country` | string | no | Filter by country name (partial match, e.g. "Kenya", "United States", "Brazil"). Case-insensitive. |

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": "unhabitat.urban.transport_access",
    "arguments": {}
  }
}
```

## Why unhabitat.urban.transport_access is rated Low

Tool queries UN-Habitat database for public transit access statistics; no side effects or data modification.

From the tool's own definition: "Retrieve city-level data on proportion of urban population with convenient access to public transport"

## Use case

AI agents call unhabitat.urban.transport_access 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": {
    "unhabitat.urban.transport_access": {}
  }
}
```

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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