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MCPSTAMP
MCP server report

Gavelin MCP server

ai.gavelin/mcp

We checked this server on 2 November 2026 with McpStamp Check engine 1.2.0. It scored 85 of 100 (grade B), higher than 31.2% of the 33,003 registry servers that responded over HTTPS that day. Ready for MCP Registry. Not ready for ChatGPT. Unverified for Claude and Gemini.

Measured facts

Score
85B
Sign-in
OAuth
Tools listed
Behind sign-in
Protocol version
None returned
Stores

Store readiness

StoreStatusReason
Claude Connectors Directory Unverified Nothing failed, but tools/list returns tools, inputSchema is an object schema, readOnlyHint or destructiveHint on every tool and Human-readable title on every tool could not run in a check without credentials.
ChatGPT app directory Not ready Blocked by Protected resource metadata (RFC 9728).
Gemini Connected Apps Unverified Nothing failed, but Supported protocol version negotiated, tools/list returns tools and inputSchema is an object schema could not run in a check without credentials.
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

    Protected resource metadata (RFC 9728)

    auth_prm

    Blocks ChatGPT.

    Measured Not found: https://mcp.gavelin.ai/.well-known/oauth-protected-resource/mcp -> 404; https://mcp.gavelin.ai/.well-known/oauth-protected-resource -> 404. Authoriza

    Serve RFC 9728 metadata at /.well-known/oauth-protected-resource (plus the path-suffixed form) with "resource" and "authorization_servers".

  2. Warning

    401 carries WWW-Authenticate resource_metadata

    auth_challenge

    Measured initialize: WWW-Authenticate bearer without resource_metadata

    Add resource_metadata="https://<host>/.well-known/oauth-protected-resource<path>" to the WWW-Authenticate: Bearer header on 401.

10 checks passed, 15 did not run

Passed. Served over HTTPS, initialize over Streamable HTTP, GET answers SSE or 405, initialize latency, Sign-in method the store supports (OAuth or none), Authorization server metadata (RFC 8414 / OIDC), First metadata URL Gemini tries answers 200 with the required fields, PKCE S256 advertised, Client registration (DCR or Client ID Metadata Documents), refresh_token grant advertised.

Not run. Resource metadata "resource" equals the server URL, issuer equals the authorization_servers entry; token_endpoint_auth_methods_supported (ChatGPT). These need an OAuth sign-in flow the check could not reach.

Not run. Supported protocol version negotiated, JSON or SSE response Content-Type, JSON-RPC error for unknown method, 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, Explicit readOnlyHint, destructiveHint and openWorldHint (ChatGPT), Human-readable title on every tool, Tool descriptions. The tools sit behind sign-in, and the check runs without credentials.

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McpStamp score for Gavelin

Markdown

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HTML

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Registry entry

About this server

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Registry name
ai.gavelin/mcp
Remote URL
https://mcp.gavelin.ai/mcp
Version
1.0.0
Source
github.com/gavelin-ai/mcp
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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