Validador de Config MCP

An MCP Config Validator is a vital security and syntax utility used to verify the integrity of Model Context Protocol configuration files. This tool is essential for developers, AI power users, and system administrators preventing application crashes in Claude or Cursor, ensuring that JSON syntax is perfectly valid (down to the last comma), and confirming that environment variables and server paths are correctly structured for the current Operating System.

The processing engine handles validation through a rigorous three-stage technical pipeline:

1. Syntactic Linter: The tool identifies JSON format errors (e.g., missing quotes, trailing commas, or unclosed braces). This is the #1 cause of MCP failure in professional environments.
2. Schema Enforcement: The engine applies Official MCP Schema rules:
   • Root Key Check: Validating the presence of the mcpServers object.
   • Server Definition: Verifying that every server has a command (string) and that args is a valid array of strings.
   • Env Mapping: Ensuring that secret keys are in a flat key-value object.
3. Execution Path Heuristics: The tool analyzes the Configured Commands:
   • Path Intelligence: Warning if paths use Unix-style / on Windows or Windows-style \ on Mac.
   • Binary Detection: Identifying if standard binaries (node, python, npx) are being called correctly.
4. Reactive Real-time Feedback: Your "Validation Report" populates instantly as you paste your JSON or type new server definitions.

The History of Validation: From Manual Editing to Automated Linting

How we configure software has evolved from "Trial and Error" into structured automated checks.

• The Configuration File (1970s): Early software used .ini or flat text files. Errors were hard to find until the program failed.
• The JSON/YAML Revolution (2010s): The shift to machine-readable formats. While structured, they are incredibly sensitive to tiny punctuation errors.
• The Protocol Validator (2024): With the rise of the Model Context Protocol, the complexity of AI configuration reached a point where manual verification became impossible. This tool Automates the audit of those connections, turning a "Broken" config into a "Verified" one in seconds.

Technical Comparison: Validation Levels

Understanding the "Depth of a Check" is vital for System Stability and AI Reliability.

Level	Check performed	logic	Workflow Impact
Syntax	JSON valid?	Strict JSON	Baseline Safety
Structure	MCP Keys?	RFC Schema	App Stability
Type Check	Args = String Array?	TypeScript Logic	Logic Safety
Environmental	Paths exist?	OS Inspection	High Reliability
Sensitive Data	Plaintext Keys?	Security logic	Data Safety

By using this tool, you ensure your MCP Infrastructure is technically reliable and ready for deployment.

Security and Privacy Considerations

Your configuration validation is performed in a secure, local environment:

• Local Logical Execution: All JSON parsing and schema linting are performed locally in your browser. Your sensitive server paths and private API keys never touch our servers.
• Zero Log Policy: We do not store or track your inputs. Your Private Server Architectures and System Configurations remain entirely confidential.
• W3C Security Compliance: The tool operates within the standard browser sandbox, ensuring no interaction with your local file system or Private Metadata.
• Privacy First: To maintain absolute Data Privacy, the tool functions as an anonymous utility.

How It's Tested

We provide a high-fidelity engine that is verified against Latest MCP v1.0.0+ configuration specs.

1. The "Trailing Comma" Pass:
   • Action: Paste a JSON block where the last item has a comma.
   • Expected: The Audit engine must flag this as an "Invalid JSON" error immediately.
2. The "Type Mismatch" Check:
   • Action: Set "args" to a single string instead of an array.
   • Expected: The tool must correctly flag the schema violation and suggest the array format ["arg"].
3. The "Missing Root" Test:
   • Action: Paste an object without the mcpServers key.
   • Expected: The tool must advise on the required root key for Claude and Cursor.
4. The "Path Slash" Defense:
   • Action: Input a Windows path with single backslashes \.
   • Expected: The tool must warn you that JSON requires double backslashes \\ to be valid.