com.voltcast/voltcast
REMOTE · VOLTCAST.COM · SCANNED SEP 28
European day-ahead electricity prices (43 zones), accuracy-published forecasts, carbon, optimize.
Available components
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. How we score → Why this is hard to score →
Endpoint Security83
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC is configured correctly; the domain's records validate against the full chain to the root. View diagnostics → Pass
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability74
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 658 tokens (~94/item across 7 items; 7 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage87
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 61% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 7 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 8 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities60
- Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28. See how to fix → Fail
How do I install the com.voltcast/voltcast MCP server?
com.voltcast/voltcast is a hosted endpoint at https://voltcast.com/api/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · voltcast.com
claude mcp add --transport http com-voltcast-voltcast 'https://voltcast.com/api/mcp'
{
"mcpServers": {
"com-voltcast-voltcast": {
"url": "https://voltcast.com/api/mcp"
}
}
} {
"servers": {
"com-voltcast-voltcast": {
"type": "http",
"url": "https://voltcast.com/api/mcp"
}
}
} [mcp_servers.com-voltcast-voltcast] url = "https://voltcast.com/api/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"com-voltcast-voltcast": {
"type": "remote",
"url": "https://voltcast.com/api/mcp",
"enabled": true
}
}
} openclaw mcp add com-voltcast-voltcast --url 'https://voltcast.com/api/mcp' --transport streamable-http
mcp_servers:
com-voltcast-voltcast:
url: "https://voltcast.com/api/mcp" {
"McpServers": {
"com-voltcast-voltcast": {
"Transport": "http",
"Url": "https://voltcast.com/api/mcp"
}
}
} assistant mcp add com-voltcast-voltcast -t streamable-http -u 'https://voltcast.com/api/mcp'
{
"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.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 28 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 25 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 24 Sept 26 +7
- Authorization: unverified → partial ▲ security
- The server rewrote its instructions, which are the text every model session reads security
- Tool “cheapest_window” rewrote its description, which is the text the model reads security
- Tool “get_forecast” rewrote its description, which is the text the model reads security
- Tool “get_prices” rewrote its description, which is the text the model reads security
- Tool “get_renewables” rewrote its description, which is the text the model reads security
- Tool “cheapest_window” changed its title: Cheapest Window cosmetic
- Tool “get_carbon” changed its title: Get Carbon cosmetic
- Tool “get_forecast” changed its title: Get Forecast cosmetic
- Tool “get_prices” changed its title: Get Prices cosmetic
- Tool “get_realtime_prices” changed its title: Get Realtime Prices cosmetic
- Tool “get_renewables” changed its title: Get Renewables cosmetic
- Tool “list_zones” changed its title: List Zones cosmetic
- 2 Sept 26 0
- Tool “cheapest_window” rewrote its description, which is the text the model reads security
- Schema quality: 86 → 95 ▼ functional
- “cheapest_window” added an optional parameter “objective” cosmetic
- “cheapest_window” added an optional parameter “tariff” cosmetic
- 26 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 25 Aug 26 0
- Stability: 0.97 → pass security
- The server rewrote its instructions, which are the text every model session reads security
- Tool “get_forecast” rewrote its description, which is the text the model reads security
- Tool “get_prices” rewrote its description, which is the text the model reads security
- 12 Aug 26 0
- Tool “get_forecast” rewrote its description, which is the text the model reads security
- Tool “get_renewables” rewrote its description, which is the text the model reads security
- 11 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 28 Sept 2026 · Probed https://voltcast.com/api/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=voltcast.com | CN=WE1,O=Google Trust Services,C=US | 7 Sept 2026 | 6 Dec 2026 | ECDSA 256 | ECDSA-SHA256 | 7c9638fcdfa67c1c0e43d8a61ad79a57 |
| SANs: voltcast.com, *.voltcast.com | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC secure
Validation of voltcast.com. — Secure
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| voltcast.com. | present | 2371 | 13 | Verified |
| voltcast.com. | Verified address RRset verified with the apex keys |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=31536000; includeSubDomains |
| x-content-type-options | nosniff |
| x-frame-options | SAMEORIGIN |
| referrer-policy | strict-origin-when-cross-origin |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://voltcast.com/api/mcp | Verified | 200 | |
| http (plaintext) | http://voltcast.com/api/mcp | HTTPS enforced | 301 | https://voltcast.com/api/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
cheapest_window Cheapest Window ~150
Rank household action windows by cost using current Voltcast curves and optional user-supplied variable tariff inputs. Experimental carbon/balanced modes use a disclosed trailing historical production-mix profile—not a forward carbon forecast—and support no emissions-reduction claim.
| Name | Type | Req | Description |
|---|---|---|---|
| count | integer | – | How many windows (default 3) |
| duration_minutes | integer | yes | Window length in minutes |
| from | string | – | – |
| objective | string | – | Ranking objective (default cost). Carbon/balanced are experimental historical-profile heuristics, not forward carbon forecasts. |
| tariff | object | – | Optional variable household bill inputs; fixed monthly charges are excluded. |
| to | string | – | – |
| zone | string | yes | – |
No output schema declared.
No examples provided.
get_carbon Get Carbon ~58
Carbon intensity (gCO2eq/kWh) and green score (0-100 low-carbon share) derived from the live generation mix.
| Name | Type | Req | Description |
|---|---|---|---|
| from | string | – | – |
| to | string | – | – |
| zone | string | yes | – |
No output schema declared.
No examples provided.
get_forecast Get Forecast ~61
Probabilistic price forecast up to 7 days ahead. Returns the P50 curve and any uncertainty bands included in the connected account. Accuracy is published daily at voltcast.com/accuracy.
| Name | Type | Req | Description |
|---|---|---|---|
| horizon | string | – | – |
| zone | string | yes | – |
No output schema declared.
No examples provided.
get_prices Get Prices ~95
Day-ahead electricity prices in each zone's native currency and native market resolution. Connect an existing Voltcast account to access account-scoped data.
| Name | Type | Req | Description |
|---|---|---|---|
| from | string | – | ISO 8601 start (default: yesterday) |
| resolution | string | – | – |
| to | string | – | ISO 8601 end (default: tomorrow) |
| zone | string | yes | Bidding zone code, e.g. 'DE-LU' |
No output schema declared.
No examples provided.
get_realtime_prices Get Realtime Prices ~109
Explicitly labeled real-time market prices (currently WEIM), kept separate from day-ahead curves. Requires an API key.
| Name | Type | Req | Description |
|---|---|---|---|
| from | string | – | ISO 8601 start (default: last 24h) |
| market | string | – | Optional market filter, e.g. 'weim' |
| to | string | – | ISO 8601 end (default: now) |
| zone | string | yes | Market reference code, e.g. 'US-WEIM-AZPS' |
No output schema declared.
No examples provided.
get_renewables Get Renewables ~92
Day-ahead wind and solar generation forecasts: the TSO official forecast and Voltcast model with uncertainty bands, realized generation, and disclosed head-to-head verification. Requires the corresponding existing account entitlement.
| Name | Type | Req | Description |
|---|---|---|---|
| from | string | – | ISO 8601 start |
| to | string | – | ISO 8601 end |
| zone | string | yes | Bidding zone code, e.g. 'DE-LU' |
No output schema declared.
No examples provided.
list_zones List Zones ~27
List all supported European bidding zones with codes, names, and capabilities. No auth required.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
What is the com.voltcast/voltcast MCP server?
com.voltcast/voltcast is an MCP server listed in the public MCP registry as com.voltcast/voltcast. European day-ahead electricity prices (43 zones), accuracy-published forecasts, carbon, optimize. This page covers its hosted endpoint (https://voltcast.com/api/mcp).
Is the com.voltcast/voltcast MCP server safe to use?
com.voltcast/voltcast scores 86 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the com.voltcast/voltcast MCP server expose?
com.voltcast/voltcast exposes 7 tools: list_zones, get_prices, get_realtime_prices, get_forecast, get_carbon, and 2 more. Their descriptions and schemas cost roughly 592 tokens of context every time the server is loaded.
Does the com.voltcast/voltcast MCP server require authentication?
No. We connected to com.voltcast/voltcast without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the com.voltcast/voltcast MCP server still maintained?
com.voltcast/voltcast is still listed as active in the MCP registry. We last reached this channel on 28 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.