Skip to content
MCPSTAMP
MCP server report

GuestGraph MCP server

io.guestgraph/mental-model

We checked this server on 2 November 2026 with McpStamp Check engine 1.2.0. It scored 91 of 100 (grade A), higher than 62.2% 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
91A
Sign-in
No sign-in
Tools listed
14
Protocol version
2025-11-25
Stores

Store readiness

StoreStatusReason
Claude Connectors Directory Not ready Blocked by Human-readable title on every tool.
ChatGPT app directory Not ready Blocked by Explicit readOnlyHint, destructiveHint and openWorldHint (ChatGPT) and Human-readable title on every tool.
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

2 checks to fix

  1. Fails

    Explicit readOnlyHint, destructiveHint and openWorldHint (ChatGPT)

    tool_open_world

    Blocks ChatGPT.

    Measured 14/14 tools miss an explicit hint: list_types, describe_schema, describe_relations, list_rules, describe_rule and 9 more

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

  2. Fails

    Human-readable title on every tool

    tool_titles

    Blocks Claude and ChatGPT.

    Measured 14/14 without title: list_types, describe_schema, describe_relations, list_rules, describe_rule and 9 more

    Add a short human-readable "title" to every tool (shown in store UIs and consent screens).

15 checks passed, 10 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, initialize latency, serverInfo name and version, Server instructions, tools capability declared, tools/list returns tools, inputSchema is an object schema, Tool names are valid and portable, readOnlyHint or destructiveHint on every tool, Tool descriptions.

Not run. Sign-in method the store supports (OAuth or none), 401 carries WWW-Authenticate resource_metadata, 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), refresh_token grant advertised. The server asks for no sign-in, so the OAuth checks do not apply.

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.

Re-check now

Badge

README badge

The badge shows the latest score for this URL and links to this report.

McpStamp score for GuestGraph

Markdown

[![McpStamp score](https://www.mcpstamp.com/badge?url=https%3A%2F%2Fmcp.guestgraph.io%2Fmcp)](https://www.mcpstamp.com/r/io-guestgraph-mental-model/)

HTML

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

About this server

GuestGraph: One guest, not five strangers
Registry name
io.guestgraph/mental-model
Remote URL
https://mcp.guestgraph.io/mcp
Version
0.1.0
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.

More grade A servers

All grade A servers · All server reports · State of MCP readiness, November 2026