# opensensemap.boxes.search

Search OpenSenseMap crowdsourced environmental sensor stations by location, name, group tag, exposure type, or measured phenomenon. Returns up to 100 stations with their sensors and latest measurement values. OpenSenseMap hosts 15,000+ community-operated senseBox stations worldwide measuring PM2.5, temperature, humidity, UV, pressure, CO₂, and more. Location search: provide latitude+longitude to find stations within max_distance meters (default 5 km). Name search: pass name to filter by station name substring (e.g. "berlin", "school"). Phenomenon filter: use "Temperatur", "PM2.5", "rel. Luftfeuchte", "Luftdruck", or "UV-Intensität" to find stations measuring a specific sensor type. Exposure filter: "outdoor" for weather/air-quality monitors, "indoor" for home sensors. Each result includes station ID (use with box_detail or sensors_latest), coordinates, sensor list, and last measurement values. Data is PDDL 1.0 public domain, no attribution required. Source: https://opensensemap.org

Agent View of the PolicyLayer registry record for `opensensemap.boxes.search`. HTML page: https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/opensensemap.boxes.search

## Facts

- Tool: `opensensemap.boxes.search`
- 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: 8
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `name` | string | no | Filter stations by name substring (case-insensitive). Example: "berlin" returns all stations with "berlin" in their name. |
| `limit` | integer | no | Maximum number of stations to return (1–100, default 20). |
| `exposure` | string | no | Filter stations by sensor placement: "outdoor" for weather/air-quality monitors, "indoor" for home environment sensors, "mobile" for moving sensors. |
| `grouptag` | string | no | Filter stations by group tag. Tags are set by station owners to identify communities or projects (e.g. "luftdaten", "sensebox", "airrohr"). |
| `latitude` | number | no | Latitude of the search center point (WGS84, e.g. 52.52 for Berlin). Required when longitude is provided. |
| `longitude` | number | no | Longitude of the search center point (WGS84, e.g. 13.40 for Berlin). Required when latitude is provided. |
| `phenomenon` | string | no | Filter stations that measure a specific phenomenon by sensor title (e.g. "Temperatur", "PM2.5", "rel. Luftfeuchte", "Luftdruck", "UV"). Case-insensitive. |
| `max_distance` | integer | no | Maximum search radius in meters when using lat/lng search (default 5000, i.e. 5 km). |

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": "opensensemap.boxes.search",
    "arguments": {}
  }
}
```

## Why opensensemap.boxes.search is rated Low

Tool retrieves publicly available environmental sensor data without modification or side effects.

From the tool's own definition: "Search crowdsourced environmental sensor stations by location, name, group tag, exposure type, or measured phenomenon. Returns up to 100 stations."

## Use case

AI agents call opensensemap.boxes.search 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": {
    "opensensemap.boxes.search": {}
  }
}
```

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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)
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---

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