MCP server

Sigistry Plugin Catalog (formerly Claude Registry)

com.clauderegistry/plugin-catalog

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

Renamed: prefer com.sigistry/plugin-catalog. This legacy endpoint keeps working.

At a glance

Type

MCP server

Publisher

clauderegistry.com (verified by the MCP Registry)

Status

Working at last check

Tools

9

Token cost

About 1,664 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 plugin-catalog https://clauderegistry.com/mcp

Claude Desktop

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

Codex (config.toml)

[mcp_servers.plugin-catalog]
url = "https://clauderegistry.com/mcp"

Gemini CLI

{"mcpServers":{"plugin-catalog":{"httpUrl":"https://clauderegistry.com/mcp"}}}

Cursor

{"mcpServers":{"plugin-catalog":{"url":"https://clauderegistry.com/mcp"}}}

VS Code

{"servers":{"plugin-catalog":{"type":"http","url":"https://clauderegistry.com/mcp"}}}

Antigravity

agy mcp add plugin-catalog https://clauderegistry.com/mcp

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":"plugin-catalog","server_url":"https://clauderegistry.com/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"plugin-catalog","server_url":"https://clauderegistry.com/mcp"}

Tools

• check_mcp_app ~271 tokens
  Get the Sigistry MCP App safety criteria to audit an MCP App (MCP Apps / SEP-1865: a tool that returns an interactive ui:// HTML resource the host renders in a sandboxed iframe) BEFORE shipping it. Returns two groups of checks: spec conformance (ui:// scheme, the text/html;profile=mcp-app mimeType,
• get_plugin ~133 tokens
  Get the full details of a single Sigistry plugin by its id, including install commands, component counts, and its security-audit result (per-check pass/fail from the Verified by Sigistry methodology).
• get_scorecard ~176 tokens
  Get the full scorecard for one graded MCP server by its id: the overall grade, per-axis pass/partial/fail with cited evidence, hardening notes, the rubric version, and the exact commit graded. Grades describe the pinned commit only; a re-grade at a newer commit can be requested via an issue on the m
• get_skill ~206 tokens
  Get one Sigistry skill by name, including the full raw SKILL.md source. The source is portable: it can be applied directly in any SKILL.md-aware agent (Claude Code, Claude Desktop, and others) without installing anything, or installed natively in Claude Code via the parent plugin, which keeps it ver
• list_categories ~77 tokens
  List the distinct plugin categories in the Sigistry marketplace with a count of plugins in each, plus the total plugin count.
• list_scorecards ~157 tokens
  List the public MCP servers Sigistry has independently graded against its scorecard rubric (transport, stateless core, lifecycle, authorization, tool design, security hygiene), each with an overall grade A-F and the exact commit graded. Useful before connecting an agent to a third-party MCP server:
• search_plugins ~170 tokens
  Search the Sigistry marketplace of Claude Code plugins by keyword and/or category. Returns matches with their install command and verification status (the registry runs an eight-check security audit; prefer "verified" plugins when recommending an install).
• search_skills ~201 tokens
  Search the Sigistry catalog of verified skills (SKILL.md instruction sets for AI agents) by keyword, optionally filtered to one parent plugin. Every skill passed the skill-safety check: no command shadowing, honestly-scoped triggers, no injection or concealment language, no unsafe scripts. Use get_s
• verify_plugin ~273 tokens
  Get the recipe to run the Sigistry verification methodology (the eight static checks that gate the Verified badge: manifest integrity, hook safety, agent tool scopes, command hygiene, skill structure, skill safety, no secrets, documentation) against a plugin BEFORE publishing it. The verification ru

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