Voice School Lesson Booking
REMOTE · MCP.VOICE-SCHOOL.COM · SCANNED AUG 9
Request online singing lessons with Voice School and Daria Klishina.
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 →
Endpoint Security57
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not fully verified: no authorisation is required to call this server, and 4 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability57
- AI-judged instruction clarity (fair).Partial
- Tool/resource definitions use about 353 tokens (~88/item across 4 items; 4 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management3
- Stability observed for 1 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage71
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 0% of tool parameters carry a description.Fail
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Add this component to your MCP client. Where a client-specific snippet is available, pick your client below and copy it straight into your config; otherwise use the connection detail shown.
remote · mcp.voice-school.com
claude mcp add --transport http com-voice-school-singing-vocal-lesson-booking https://mcp.voice-school.com/singing-vocal-lesson-booking/mcp
[mcp_servers.com-voice-school-singing-vocal-lesson-booking] url = "https://mcp.voice-school.com/singing-vocal-lesson-booking/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"com-voice-school-singing-vocal-lesson-booking": {
"type": "remote",
"url": "https://mcp.voice-school.com/singing-vocal-lesson-booking/mcp",
"enabled": true
}
}
} openclaw mcp add com-voice-school-singing-vocal-lesson-booking --url https://mcp.voice-school.com/singing-vocal-lesson-booking/mcp --transport streamable-http
mcp_servers:
com-voice-school-singing-vocal-lesson-booking:
url: "https://mcp.voice-school.com/singing-vocal-lesson-booking/mcp" {
"mcpServers": {
"com-voice-school-singing-vocal-lesson-booking": {
"type": "http",
"url": "https://mcp.voice-school.com/singing-vocal-lesson-booking/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.
- 9 Aug 26 +1
- Stability: unverified → 0.03 ▲ functional
- 8 Aug 26 56
First indexed and scored.
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 9 Aug 2026 · Probed https://mcp.voice-school.com/singing-vocal-lesson-booking/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=voice-school.com | CN=YE1,O=Let's Encrypt,C=US | 19 Jun 2026 | 17 Sept 2026 | ECDSA 256 | ECDSA-SHA384 | 53435d90543ce48d5a84dd04c0f4657007b |
| SANs: *.voice-school.com, voice-school.com | ||||||
| CN=YE1,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 5ddd70dd31f801c85c186a7a04b80afe |
| CN=Root YE,O=ISRG,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | ECDSA-SHA384 | 872165fc34b6e5fba8add5b3705fb53a |
| CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | SHA256-RSA | 6c8f1dc727c7117f7baf853ac980f9cd |
DNSSEC insecure
Validation of mcp.voice-school.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| voice-school.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
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 |
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://mcp.voice-school.com/singing-vocal-lesson-booking/mcp | Verified | 200 | |
| http (plaintext) | http://mcp.voice-school.com/singing-vocal-lesson-booking/mcp | HTTPS enforced | 301 | https://mcp.voice-school.com/singing-vocal-lesson-booking/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.
create_lesson_request ~139
Create a request-first lead for an online vocal lesson. Requires name and at least one contact method. This never confirms a lesson or creates a private schedule item.
| Name | Type | Req | Description |
|---|---|---|---|
| city_context | string | – | – |
| coach_slug | string | – | – |
| string | – | – | |
| language | string | – | – |
| message | string | – | – |
| name | string | yes | – |
| phone | string | – | – |
| requested_start | string | – | – |
| requester_timezone | string | – | – |
| service_slug | string | – | – |
| source_agent | string | – | – |
| telegram | string | – | – |
| string | – | – |
Structured output declared, but exposes no named fields.
No examples provided.
list_lesson_options ~41
List active lesson services and prices for a coach from the live Voice School database.
| Name | Type | Req | Description |
|---|---|---|---|
| coach_slug | string | – | – |
| language | string | – | – |
Structured output declared, but exposes no named fields.
No examples provided.
search_lesson_availability ~74
Find free requestable lesson times using coach working windows and busy intervals. The response never includes private learner data.
| Name | Type | Req | Description |
|---|---|---|---|
| coach_slug | string | – | – |
| date_from | – | – | – |
| date_to | – | – | – |
| limit | integer | – | – |
| service_slug | string | – | – |
| user_timezone | – | – | – |
Structured output declared, but exposes no named fields.
No examples provided.
voice_school_info ~32
Public description, policy, and catalog links for Voice School online vocal lesson requests.
| Name | Type | Req | Description |
|---|---|---|---|
| language | string | – | – |
Structured output declared, but exposes no named fields.
No examples provided.