# buy_market_brief

Returns licensed ENTSO-E and SMARD spot-market context for compute, DePIN, battery and power-trading agents: published day-ahead prices, volatility, load, renewable share when available, the observed share of published negative-price hours, uncertainty, freshness and expiry.

Agent View of the PolicyLayer registry record for `buy_market_brief`. HTML page: https://policylayer.com/tools/de-netzhandwerker-energy-research-hub/buy-market-brief

## Facts

- Tool: `buy_market_brief`
- Server: Netzhandwerker EU Power Dispatch API (`https://energy.netzhandwerker.de/mcp`) — https://policylayer.com/tools/de-netzhandwerker-energy-research-hub.md
- Homepage: https://github.com/https://energy.netzhandwerker.de/mcp
- Risk category: Read (Low risk)
- Registry record: grade C, identity unverified
- Server auth posture: open
- Server CORS policy: *
- Server rate-limited: no
- Parameters: 3 (3 required)
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `region` | string | yes |  |
| `use_case` | string | yes |  |
| `horizon_hours` | integer | yes |  |

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": "buy_market_brief",
    "arguments": {
      "region": "<region>",
      "use_case": "<use_case>",
      "horizon_hours": 0
    }
  }
}
```

## Why buy_market_brief is rated Low

Even though buy_market_brief only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

## Use case

AI agents call buy_market_brief to retrieve information from Netzhandwerker EU Power Dispatch API 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 Netzhandwerker EU Power Dispatch API:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "buy_market_brief": {}
  }
}
```

## Other tools on Netzhandwerker EU Power Dispatch API (2)

- `find_energy_opportunity` — Read — https://policylayer.com/tools/de-netzhandwerker-energy-research-hub/find-energy-opportunity.md
- `buy_dispatch_plan` — Write — https://policylayer.com/tools/de-netzhandwerker-energy-research-hub/buy-dispatch-plan.md

## 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=de-netzhandwerker-energy-research-hub · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/de-netzhandwerker-energy-research-hub