# com.voltcast/voltcast (remote · voltcast.com)

European day-ahead electricity prices (43 zones), accuracy-published forecasts, carbon, optimize.

- Trust score: 62/100 (medium)
- Change this week: +4
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `voltcast.com`: 62/100 (this document), [markdown](https://verifymcp.io/servers/com-voltcast-voltcast/api-mcp.md), [page](https://verifymcp.io/servers/com-voltcast-voltcast/api-mcp)

## Channel facts

- Endpoint: `https://voltcast.com/api/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-03.

- **Endpoint Security**: 66/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 6 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC is configured correctly; the domain's records validate against the full chain to the root.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 54/100
  - AI-judged instruction clarity (fair).
  - Tool/resource definitions use about 484 tokens (~80/item across 6 items; 6 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 82/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 47% of tool parameters carry a description.
- **Capabilities**: 60/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add --transport http com-voltcast-voltcast https://voltcast.com/api/mcp
```

### Codex

```toml
[mcp_servers.com-voltcast-voltcast]
url = "https://voltcast.com/api/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-voltcast-voltcast": {
      "type": "remote",
      "url": "https://voltcast.com/api/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-voltcast-voltcast --url https://voltcast.com/api/mcp --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-voltcast-voltcast:
    url: "https://voltcast.com/api/mcp"
```

### Other

```json
{
  "mcpServers": {
    "com-voltcast-voltcast": {
      "type": "http",
      "url": "https://voltcast.com/api/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-02 (score 62, +1)

No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-31 (score 61, +3)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-30 (score 58, −1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-28 (score 59, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-27 (score 58, +1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-26 (score 57)

First indexed and scored.

## MCP tools (6)

### `list_zones` (~27 tokens)

List all supported European bidding zones with codes, names, and capabilities. No auth required.

### `get_prices` (~98 tokens)

Day-ahead electricity prices (EUR/MWh, 15-minute native) for a bidding zone. Requires an API key (free at voltcast.com/register).

Input parameters:

- `from` (string): ISO 8601 start (default: yesterday)
- `resolution` (string)
- `to` (string): ISO 8601 end (default: tomorrow)
- `zone` (string, required): Bidding zone code, e.g. 'DE-LU'

### `get_forecast` (~57 tokens)

Probabilistic price forecast (P50 curve; P10/P90 on Pro+) up to 7 days ahead. Accuracy published daily at voltcast.com/accuracy.

Input parameters:

- `horizon` (string)
- `zone` (string, required)

### `get_carbon` (~58 tokens)

Carbon intensity (gCO2eq/kWh) and green score (0-100 low-carbon share) derived from the live generation mix.

Input parameters:

- `from` (string)
- `to` (string)
- `zone` (string, required)

### `get_renewables` (~112 tokens)

Day-ahead wind + solar generation forecasts: the TSO's official forecast AND Voltcast's own model (volt-res-1) with q10-q90 bands, beside realized generation, with head-to-head verification (who beats whom, disclosed). Pro/Scale/Balancing/Quant.

Input parameters:

- `from` (string): ISO 8601 start
- `to` (string): ISO 8601 end
- `zone` (string, required): Bidding zone code, e.g. 'DE-LU'

### `cheapest_window` (~77 tokens)

Find the cheapest contiguous time window(s) to run a load, over published prices + forecast (Pro+).

Input parameters:

- `count` (integer): How many windows (default 3)
- `duration_minutes` (integer, required): Window length in minutes
- `from` (string)
- `to` (string)
- `zone` (string, required)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-voltcast-voltcast/api-mcp#diagnostics

## Score history

- 2026-08-03: 62
- 2026-08-02: 62
- 2026-08-01: 61
- 2026-07-31: 61
- 2026-07-30: 58
- 2026-07-29: 59
- 2026-07-28: 59
- 2026-07-27: 58
- 2026-07-26: 57

## Links

- Remote endpoint: https://voltcast.com/api/mcp
- Repository: https://github.com/Voltcast-com/mcp
- Website: https://voltcast.com/
- Changelog RSS feed: https://verifymcp.io/servers/com-voltcast-voltcast/api-mcp/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-voltcast-voltcast/api-mcp/changelog.json
- HTML version of this page: https://verifymcp.io/servers/com-voltcast-voltcast/api-mcp