MCP server report

MAC Address Lookup MCP server

com.jasontally.mac/mcp

We checked this server on 2 November 2026 with McpStamp Check engine 1.2.0. It scored 88 of 100 (grade B), higher than 59.9% of the 33,003 registry servers that responded over HTTPS that day. Ready for MCP Registry. Not ready for Claude, ChatGPT and Gemini.

Score: 88B
Sign-in: OAuth
Tools listed: 1
Protocol version: 2025-11-25

Stores

Store readiness

Store	Status	Reason
Claude Connectors Directory	Not ready	Blocked by Protected resource metadata (RFC 9728) and Authorization server metadata (RFC 8414 / OIDC).
ChatGPT app directory	Not ready	Blocked by Protected resource metadata (RFC 9728) and Authorization server metadata (RFC 8414 / OIDC).
Gemini Connected Apps	Not ready	Blocked by Authorization server metadata (RFC 8414 / OIDC).
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

Fails
Protected resource metadata (RFC 9728)
auth_prm

Blocks Claude and ChatGPT.

Measured https://mac.jasontally.com/.well-known/oauth-protected-resource/mcp has no authorization_servers

List your issuer URL in "authorization_servers" in the protected resource metadata.
Fails
Authorization server metadata (RFC 8414 / OIDC)
auth_as_metadata

Blocks Claude, ChatGPT and Gemini.

Measured No authorization server to probe

Serve RFC 8414 metadata at <issuer>/.well-known/oauth-authorization-server with authorization_endpoint, token_endpoint and response_types_supported ["code"].

19 checks passed, 6 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, Sign-in method the store supports (OAuth or none), Resource metadata "resource" equals the server URL, 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.

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

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Markdown

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Registry entry

About this server

Find the organization behind a MAC address or OUI prefix in the IEEE registries. No auth, no key.

Registry name: com.jasontally.mac/mcp
Remote URL: https://mac.jasontally.com/mcp
Version: 1.0.0
Source: github.com/jasontally/mac-address-lookup
Website: mac.jasontally.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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