SKILL.md Lint MCP MCP server

A hosted MCP server by Moltline Studio that provides tools to lint SKILL.md files for AI agents. It validates frontmatter, structure, secrets, and file size, and checks packaging layouts for skill marketplaces. All six tools are available for free without requiring an account or API key.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by Moltline Studio

MCP endpoint (Streamable HTTP)

https://mcp.moltlinestudio.com/skillmd-lint

Vendor documentation

What you can do with it

Validate SKILL.md frontmatter and structure
Check for secrets and file size limits
Validate zip layout plans for skill marketplaces

Tools advertised by the last live check:

lint_skill
packaging_check
regex_test
json_validate
diff_texts
cron_explain

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http skill-md-lint-mcp https://mcp.moltlinestudio.com/skillmd-lint

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add skill-md-lint-mcp --url https://mcp.moltlinestudio.com/skillmd-lint

Cursor

Merge this server into .cursor/mcp.json in your project, then enable skill-md-lint-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "skill-md-lint-mcp": {
      "url": "https://mcp.moltlinestudio.com/skillmd-lint"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "skill-md-lint-mcp": {
      "type": "streamableHttp",
      "url": "https://mcp.moltlinestudio.com/skillmd-lint",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start skill-md-lint-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "skill-md-lint-mcp": {
      "type": "http",
      "url": "https://mcp.moltlinestudio.com/skillmd-lint"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http skill-md-lint-mcp https://mcp.moltlinestudio.com/skillmd-lint

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "skill-md-lint-mcp": {
      "url": "https://mcp.moltlinestudio.com/skillmd-lint"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "skill-md-lint-mcp": {
      "serverUrl": "https://mcp.moltlinestudio.com/skillmd-lint"
    }
  }
}

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