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MCP server report

Rubrkit MCP server

com.rubrkit/rubrkit

We checked this server on 2 November 2026 with McpStamp Check engine 1.2.0. It scored 86 of 100 (grade B), higher than 58.3% of the 33,003 registry servers that responded over HTTPS that day. Ready for Gemini and MCP Registry. Not ready for Claude and ChatGPT.

Measured facts

Score
86B
Sign-in
OAuth
Tools listed
41
Protocol version
2025-06-18
Stores

Store readiness

StoreStatusReason
Claude Connectors Directory Not ready Blocked by readOnlyHint or destructiveHint on every tool.
ChatGPT app directory Not ready Blocked by readOnlyHint or destructiveHint on every tool and Explicit readOnlyHint, destructiveHint and openWorldHint (ChatGPT).
Gemini Connected Apps Ready No blocking check failed.
Official MCP Registry Ready No blocking check failed.

MCP Registry ready means a valid public remote for the registry, not that the server is listed in a store.

Fixes

5 checks to fix

  1. Fails

    readOnlyHint or destructiveHint on every tool

    tool_annotations

    Blocks Claude and ChatGPT.

    Measured 41/41 tools set neither readOnlyHint nor destructiveHint: rubrkit_search_api_docs, rubrkit_read_api_doc, rubrkit_read_openapi_contract, rubrkit_create_artifact_

    Set annotations.readOnlyHint: true on read-only tools and destructiveHint: true on tools that modify or delete data (Claude needs one of them on every tool; ChatGPT needs all three hints, see tool_open_world).

  2. Fails

    Explicit readOnlyHint, destructiveHint and openWorldHint (ChatGPT)

    tool_open_world

    Blocks ChatGPT.

    Measured 41/41 tools miss an explicit hint: rubrkit_search_api_docs, rubrkit_read_api_doc, rubrkit_read_openapi_contract, rubrkit_create_artifact_bundle, rubrkit_list_ar

    Set readOnlyHint, destructiveHint and openWorldHint to explicit true/false on every tool (OpenAI app review requires all three).

  3. Warning

    Tool descriptions

    tool_descriptions

    Measured 2 under 60 chars: rubrkit_read_openapi_contract, rubrkit_poll_job

    Keep each tool description between 60 and 2000 characters: when to use it, what it returns, key limits.

  4. Warning

    initialize latency

    latency

    Measured 1780 ms

    Bring initialize under 1.5 s: avoid cold starts and upstream calls in the handshake.

  5. Warning

    refresh_token grant advertised

    auth_refresh

    Measured grant_types_supported: ["authorization_code"]

    Issue refresh tokens and list "refresh_token" in grant_types_supported so users are not logged out hourly.

21 checks passed, 1 did not run

Passed. Served over HTTPS, initialize over Streamable HTTP, Supported protocol version negotiated, JSON or SSE response Content-Type, JSON-RPC error for unknown method, GET answers SSE or 405, serverInfo name and version, Server instructions, tools capability declared, Sign-in method the store supports (OAuth or none), Protected resource metadata (RFC 9728), Resource metadata "resource" equals the server URL, Authorization server metadata (RFC 8414 / OIDC), First metadata URL Gemini tries answers 200 with the required fields, issuer equals the authorization_servers entry; token_endpoint_auth_methods_supported (ChatGPT), PKCE S256 advertised, Client registration (DCR or Client ID Metadata Documents), tools/list returns tools, inputSchema is an object schema, Tool names are valid and portable, Human-readable title on every tool.

Not run. 401 carries WWW-Authenticate resource_metadata. These need an OAuth sign-in flow the check could not reach.

Run a fresh check

This page is the 2 November 2026 snapshot. If you maintain this server and have shipped fixes since then, re-check it. The live check and the badge show the current result, and the next snapshot will pick up the change.

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McpStamp score for Rubrkit

Markdown

[![McpStamp score](https://www.mcpstamp.com/badge?url=https%3A%2F%2Fwww.rubrkit.com%2Fapi%2Fv1%2Fmcp)](https://www.mcpstamp.com/r/com-rubrkit-rubrkit/)

HTML

<a href="https://www.mcpstamp.com/r/com-rubrkit-rubrkit/"><img src="https://www.mcpstamp.com/badge?url=https%3A%2F%2Fwww.rubrkit.com%2Fapi%2Fv1%2Fmcp" alt="McpStamp score" height="20"></a>
Registry entry

About this server

MCP-native AI evaluation: rubric audits, eval suites, and proof reports for AI/LLM output.
Registry name
com.rubrkit/rubrkit
Remote URL
https://www.rubrkit.com/api/v1/mcp
Version
1.0.0
Source
github.com/liberat0r/react-rubrkit
Website
www.rubrkit.com
Checked
2 November 2026, engine 1.2.0, no credentials

The description above is the server's own text from the official MCP Registry. If a result looks wrong, run a fresh check and email support@zovo.one with the report link.

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