Mmcp.market

Sigistry Plugin Catalog (formerly Claude Registry) MCP server

by clauderegistry.com·com.clauderegistry/plugin-catalog·v1.2.0
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Renamed: prefer com.sigistry/plugin-catalog. This legacy endpoint keeps working.

C67/100grade C
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Safety scan
C67/100

full report

Adoption
New

Little public usage data yet

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If you have run it, two minutes of your experience saves the next person an afternoon.

Sigistry Plugin Catalog (formerly Claude Registry) tools (8)

write = sends, deletes, buys or posts
  • get_pluginFree

    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_scorecardFree

    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 marketplace repo.

  • get_skillFree

    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 verified and updated. The returned skill passed the Sigistry skill-safety check at the parent plugin's verification date.

  • list_categoriesFree

    List the distinct plugin categories in the Sigistry marketplace with a count of plugins in each, plus the total plugin count.

  • list_scorecardsFree

    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: check whether it has been assessed and how it scored. Use get_scorecard for the full per-axis breakdown.

  • search_pluginsFree

    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_skillsFree

    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_skill to fetch the full portable source of a match.

  • verify_pluginFree

    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 runs entirely on the local machine via a dependency-free open-source Node script; the plugin code never leaves the user's computer and this server performs no computation. Call this when the user wants their plugin or skill checked, then follow the returned steps: download the script, run it against the plugin directory, and fix any FAIL findings it reports.

Public scan report

scanner v0.1.9 · 2026-09-21 · same rubric, same numbers if you re-run it

1 low
  • –Code scanremote-only server, no package to scann/a
  • Live reliabilityremote reachable in 991ms20/20
  • Tool poisoning8 tool descriptions checked15/15
  • Auth qualityopen endpoint, read-only tools10/15
  • Maintenanceno repository listed3/15
  • Maintainer identityno repository or website to verify2/10

Findings (1)

  • lowNo source repository listedmaint.no-repo
Overall 67/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

Install directly

claude mcp add --transport http plugin-catalog https://clauderegistry.com/mcp
Add to Cursor

Sigistry Plugin Catalog (formerly Claude Registry): common questions

Is Sigistry Plugin Catalog (formerly Claude Registry) MCP server safe?
With care: it is graded C, so read the findings first (67/100). Read the Sigistry Plugin Catalog (formerly Claude Registry) safety report
How do I install Sigistry Plugin Catalog (formerly Claude Registry)?
It runs remotely at clauderegistry.com. Add it to Claude Code, Claude Desktop or Cursor with the snippets above, or call it through the mcp.market gateway without installing anything.
Does Sigistry Plugin Catalog (formerly Claude Registry) need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Sigistry Plugin Catalog (formerly Claude Registry) maintained?
The latest release is v1.2.0.
Is Sigistry Plugin Catalog (formerly Claude Registry) up?
100% of our last 9 checks got an answer. We check remote servers about four times a day.
What can I use instead of Sigistry Plugin Catalog (formerly Claude Registry)?
Servers from other publishers that do the same job: treg.to MCP server.

Alternatives to Sigistry Plugin Catalog (formerly Claude Registry)

Same job from other publishers: the closest match first, then the best rated.

  • treg.to
    OpenRouter for tools and data. Compare catalog providers and call them from one hosted MCP endpoint.
    A

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