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ClaudeChatGPTPerplexityGeminiMicrosoft CopilotRaycastMeta AIGrokZ.aiQwenKimi
DeepSeekMistralCursorVS CodeWindsurfJetBrainsClineLovableVercel AI SDKLangChain

Use NF-e Validator with your AI.

Connect your account once and let the AI you already use work with it, without building another integration. Validate the structural integrity and compliance of Brazilian NF-e access keys.

Included with plan

Ask AI about this Connector

Developed, maintained, and hosted by Vinkius.

MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED

Waiting for input…

Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.

ChatGPTClaudeCursorPerplexityGeminiMicrosoft CopilotRaycastMeta AI

Complete set · 3 capabilities

The complete NF-e Validator capability set.

These are the exact actions your AI can choose when you ask it to work with NF-e Validator.

Capability set01 / 01

01-03

3 capabilities in this set.

Part of 3 available through NF-e Validator.

  1. 01

    Extract key metadata

    Decomposes a valid access key into its constituent business parts for inspection

  2. 02

    Verify key structure

    Determines if an access key is structurally valid based on length and the mathematical checksum

  3. 03

    Validate business compliance

    Checks if the components within a key adhere to allowed tax authority standards

Observed, not estimated

615ms average. Fast in production.

NF-e Validator is checked daily against the live service.

Daily averagePeak 728ms
Aug 26Today
Fastest day
521ms
Slowest day
728ms
14-day trend
Slowing+16%

Connect your client

One URL. Every client.

Activate the Connector, copy your link, and paste it into the client you already use. 3 capabilities arrive ready to run.

Preview access · not provider authentication

The vk_preview_* token belongs to Vinkius preview infrastructure. It lets Claude discover and display the capabilities of NF-e Validator, so you can see the experience inside your AI.

It does not authenticate your account with NF-e Validator. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.

NF-e Validator Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_IRwsYmnDubhWF6CADb8mHPMbLhjrqO48Mkm0iChQ/mcp

Claude Desktop

Follow the steps below to connect in seconds.

  1. 1In Claude Desktop, open Settings → Connectors.
  2. 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
  3. 3Click Add and start a new chat — NF-e Validator capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "nf-e-access-key-validator-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_IRwsYmnDubhWF6CADb8mHPMbLhjrqO48Mkm0iChQ/mcp"
    }
  }
}
  • Claude
  • ChatGPT
  • Cursor
  • VS Code
  • Windsurf
  • Claude Code
  • JetBrains
  • Cline

Step-by-step instructions for each client are in the guide. How to connect

FAQ

Questions NF-e Validator owners ask.

  • 01

    What does verify_key_structure do?

    It checks if the 44-digit sequence is purely numeric, exactly 44 digits long, and passes the Modulo 11 checksum verification.

  • 02

    How can I see the issuer's details?

    Use the extract_key_metadata capability. It will parse the key and return the CNPJ, State Code, and other relevant metadata.

  • 03

    Does this capability check for tax compliance?

    Yes, the validate_business_compliance capability audits components like Model and Emission Type against official regulatory catalogs.

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