MCP server

SKILL.md Lint

com.moltlinestudio/skillmd-lint

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Lint a SKILL.md for frontmatter, structure, secrets and size. All 6 tools free.

Website Source

At a glance

Type

MCP server

Publisher

moltlinestudio.com (verified by the MCP Registry)

Status

Working at last check

Tools

6

Token cost

About 2,109 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

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

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.skillmd-lint]
url = "https://mcp.moltlinestudio.com/skillmd-lint"

Gemini CLI

{"mcpServers":{"skillmd-lint":{"httpUrl":"https://mcp.moltlinestudio.com/skillmd-lint"}}}

Cursor

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

VS Code

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

Antigravity

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

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"skillmd-lint","server_url":"https://mcp.moltlinestudio.com/skillmd-lint","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"skillmd-lint","server_url":"https://mcp.moltlinestudio.com/skillmd-lint"}

Tools

• cron_explain ~316 tokens
  Explain a 5-field cron expression in plain English and flag mistakes. FREE. Typical input {"expression": "0 9 * * 1-5"} returns {"expression": "0 9 * * 1-5", "meaning": "at minute 0; at hour 9; every day of month; every month; day of week 1-5", "issues": ["none"]}; out-of-range fields are listed in
• diff_texts ~354 tokens
  Produce a unified diff between two texts. FREE. Useful for comparing two SKILL.md versions. Typical input {"a": "<old text>", "b": "<new text>"} returns {"changed_lines": N, "diff": "--- \n+++ \n@@ ... @@\n-old line\n+new line"}; identical inputs return {"changed_lines": 0, "diff": "(identical)"}.
• json_validate ~297 tokens
  Validate JSON text and summarize its structure. FREE. Typical input {"text": "{\"a\": [1, 2]}"} returns {"valid": true, "structure": {"a": ["array[2]", "int"]}}; invalid JSON returns {"valid": false, "error": "<parser message>", "line": N, "column": N} instead. Use when JSON may be malformed or it
• lint_skill ~357 tokens
  Lint one SKILL.md file the way marketplaces and agents parse it. FREE. Checks YAML frontmatter presence and required fields (name, description), description quality, body structure (procedure steps, rules, degradation), secret/credential leakage, injection-style phrasing, and size budget. Typical i
• packaging_check ~386 tokens
  Validate a zip layout plan for a skill marketplace before packaging. FREE. Checks SKILL.md placement rules and flags junk files. Typical input {"file_paths": ["my-skill/SKILL.md", "my-skill/examples.md"], "marketplace": "agensi"} returns {"verdict": "pass" | "fail", "issues": ["..."], "skill_files_
• regex_test ~399 tokens
  Test a regular expression against sample strings. FREE. Typical input {"pattern": "v(\\d+)", "samples": ["v12", "beta"]} returns {"pattern": ..., "results": [{"sample": "v12", "match": true, "matched_text": "v12", "groups": ["12"]}, {"sample": "beta", "match": false, ...}], "match_count": 1}. Use

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