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Enables AI agents to issue and manage Brazilian electronic service invoices (NFS-e) through the Nota Fiscal API.
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 mcp-ai MCP server exposes 12 tools, focused primarily on developer capabilities. Its published description reads: "Enables AI agents to issue and manage Brazilian electronic service invoices (NFS-e) through the Nota Fiscal API". It communicates over Streamable HTTP using the 2025-06-18 protocol revision, and does not require authorization to connect. MCPGrade currently rates mcp-ai F — a critical issue was found and the server should not be connected as-is. Its most notable findings include "Data-exfiltration parameters" 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 mcp-ai's advertised tools, transport security, and authorization posture before connecting an autonomous agent or sharing sensitive context with it.
Add mcp-ai to an MCP client using the endpoint below. Review the grade and findings above before granting an autonomous agent access.
MCP endpoint
https://api.mcp.ai/p_notafiscalStreamable 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.
Lista as empresas (CNPJs) conectadas a este install e a situação de cada uma (company_id, razão social, município, validade do certificado).
Emite uma NFS-e (nota fiscal de serviço) para uma empresa conectada. Cria um DOCUMENTO FISCAL REAL — confirme os dados antes de chamar. - 'nfse': corpo da nota no schema da nfe.io (JSON string), com a
Consulta o status/detalhe de uma NFS-e emitida, por invoice_id. Bulk support: accepts invoice_ids for batched execution.
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: report_bug
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
ck. Include the conversation array with recent messages for reproduction. {"RecommendationRemove side-channel parameters; constrain tool inputs.
tool: marketplace
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
the MCP needs a credential/login, invoke returns a connect link; if it isRecommendationRemove side-channel parameters; constrain tool inputs.
tool: marketplace
A tool description tries to alter the model’s use of another tool.
er-MCP billing; report_bug sends feedback; request_mcp asks us to build aRecommendationDescriptions must describe only their own tool.
tool: authenticate
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
owser, copy the access token. Best: add it to this server's config as a headRecommendationRemove side-channel parameters; constrain tool inputs.
tool: (server instructions)
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
g in and copy a token. No other tools will work until authenticated.RecommendationRemove side-channel parameters; constrain tool inputs.
tool: (server instructions)
A tool description tries to alter the model’s use of another tool.
ion"), call the show_version tool. NEW MCPs/tools/integrations (capabilitiesRecommendationDescriptions 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: notafiscal_cancelar_nfse
The server advertises open-world / broadly-scoped capabilities.
annotations.destructiveHint = trueRecommendationScope tools to the minimum needed.
tool: marketplace
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
Vantaj uptime monitoring via MCP — manage monitors, heartbeats, incidents, and status pages.
Unified gateway to Algeria's TKAWEN ecosystem: commerce, certification, and AI tools.
Provides access to the Cohereon Doctrine AI safety framework with governance components, tiered access, and agent onboarding.
Agentic rails for complex workflows with receipts, fees, and MCP tool access.
Structural TC39 spec lookup for ECMA-262 and ECMA-402 in AI agents, SHA-pinned and offline-first.
Structural TC39 spec lookup for ECMA-262 and ECMA-402 in AI agents, SHA-pinned and offline-first.
Connects AI agents to the Omie ERP platform for financial and operational management in Brazilian businesses.
Access 99Pay financial data via Brazil's Open Finance for AI assistants.
Connects to Olist Tiny ERP for products, stock, orders, invoices, receivables, contacts, shipping, CRM, and price lists.
Connects to Nuvemshop stores for products, orders, customers, categories, and coupons through the official API.
Connects to Microvix retail ERP for products, inventory, customers, suppliers, sales, billing, orders, sellers, and stores.
Connects AI agents to WebDiet for patient, meal plan, and prescription management for dietitians.
Lista as NFS-e emitidas por uma empresa (paginado).
Retorna os links de PDF (DANFSe) e XML de uma NFS-e emitida. Bulk support: accepts invoice_ids for batched execution.
Cancela uma NFS-e emitida (IRREVERSÍVEL, sujeito ao prazo de cancelamento do município). Confirme antes de chamar. Bulk support: accepts invoice_ids for batched execution.
Show the current MCP platform and adapter versions.
Report a bug, missing feature, or send feedback. Include the conversation array with recent messages for reproduction.
Returns connection status and URLs. When all providers are connected, returns authenticated:true and empty pending[]. When credentials are missing, returns connect_url for the toolkit and per-install
Returns the current toolkit state: installed MCPs, their connection status, the accounts connected to each one, and how many catalog tools each exposes.
The official mcp.ai marketplace — the in-platform catalog of every MCP/tool, AND the way to run them. Covers capability requests like "find an MCP that does X", "consulta um CPF", "is there a tool for
MCP.AI for IDE agents (Cursor, etc.): log in in the browser, copy the access token. Best: add it to this server's config as a header `Authorization: Bearer <token>` for a permanent, non-expiring conne