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MB Mastering studio (Paris): audio mastering services, pricing, studio info, FAQ, and quote requests.
Do not connect
A critical issue was found. Do not connect this server as-is.
Scanned 7 days ago Due for re-check
A server can change after it's graded. Re-run the automated scan to refresh this report.
This grade is deterministic and reproducible: the same server surface always yields the same grade under a given algorithm version. It is a real automated assessment computed by the MCPGrade engine from what the probe actually observed — not a fabricated or opinion score. It is not a manual human pentest, so it can miss context-specific risks.
Every signal below was measured directly by the automated probe. The grade is derived only from evidence like this — nothing is assumed.
The mb-mastering MCP server exposes 8 tools, focused primarily on web and communication capabilities. Its published description reads: "MB Mastering studio (Paris): audio mastering services, pricing, studio info, FAQ, and quote requests". It communicates over Streamable HTTP using the 2026-07-28 protocol revision, and does not require authorization to connect. MCPGrade currently rates mb-mastering F — a critical issue was found and the server should not be connected as-is. Its most notable findings include "Cross-tool shadowing" and "Data-exfiltration parameters". This report is a deterministic, reproducible automated assessment: the same observed surface always yields the same grade under a given algorithm version, and it is refreshed as new scans arrive and free to read — but it is not a substitute for a manual human security review. Always re-check mb-mastering's advertised tools, transport security, and authorization posture before connecting an autonomous agent or sharing sensitive context with it.
Add mb-mastering to an MCP client using the endpoint below. Review the grade and findings above before granting an autonomous agent access.
MCP endpoint
https://mcp.mathieuberthet.com/Streamable HTTP transport. This is the MCP endpoint, not a website — paste it into your MCP client server list rather than a browser.
Captured passively during the read-only scan. Click any value to find servers that match it.
The tools this server advertises via tools/list — names, purposes, and the parameters each accepts, exactly as enumerated read-only.
Recherche dans les contenus de MB Mastering (services de mastering, tarifs, studio, FAQ) et renvoie une liste de résultats avec id, titre, extrait et URL. / Searches MB Mastering content (mastering se
Récupère le contenu complet d'un document MB Mastering à partir de son id (obtenu via search). / Fetches the full content of a document by id (from search results).
Liste les services de mastering de MB Mastering (mastering stéréo, stems, à distance, gravure vinyle, numérisation, formation) avec leurs tarifs et descriptions.
Donne les tarifs de mastering de MB Mastering, ainsi que les délais, la politique de révisions et les modalités de paiement.
Informations sur le studio MB Mastering : fondateur, expérience, adresse à Paris, équipement analogique, liens et réseaux.
Sorted worst-first. Each finding shows its severity, what it means, its OWASP MCP Top-10 mapping, and a recommended fix — the check id links to the exact methodology row that produced it.
tool: fetch
A tool description tries to alter the model’s use of another tool.
id (obtenu via search). / Fetches the full content of a document by iRecommendationDescriptions must describe only their own tool.
tool: send_quote_request
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
parameter "notes"RecommendationRemove side-channel parameters; constrain tool inputs.
tool: prepare_quote_email
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
ERVÉ AU STUDIO (token d'administration requis). Prépare un brouillonRecommendationRemove side-channel parameters; constrain tool inputs.
tool: prepare_quote_email
The input schema declares a parameter that asks the caller to hand over a password, key, token, or other secret — a credential-harvest / token-passthrough risk. (Bare pagination `token` params are excluded.)
parameter "auth_token"RecommendationNever pass secrets as tool arguments; authenticate out-of-band and remove credential parameters from the schema.
tool: (server instructions)
A tool description tries to alter the model’s use of another tool.
Paris). Utilise search/fetch pour la recherche documentaire, les toolsRecommendationDescriptions must describe only their own tool.
The server accepts tool enumeration (and likely invocation) with no authentication.
RecommendationRequire OAuth 2.1 authorization for any server exposing non-public tools.
tool: prepare_quote_email
The server advertises open-world / broadly-scoped capabilities.
no annotations on write-capable tool "prepare_quote_email"RecommendationScope tools to the minimum needed.
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Réponses aux questions fréquentes sur le mastering chez MB Mastering : prix, délais, révisions, travail à distance, gravure vinyle, localisation.
Envoie une demande de devis de mastering à MB Mastering par email. À utiliser quand l'utilisateur souhaite être recontacté. Requiert au minimum le nombre de titres et l'email du demandeur.
RÉSERVÉ AU STUDIO (token d'administration requis). Prépare un brouillon — ou envoie — l'email d'un devis ou d'une facture PDF à un client, depuis contact@mathieuberthet.com. Par défaut (mode « draft »