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MCP server report

ARC MCP server

ai.arcreport/mcp

We checked this server on 2 November 2026 with McpStamp Check engine 1.2.0. It scored 83 of 100 (grade B), higher than 29.9% 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
83B
Sign-in
OAuth
Tools listed
19
Protocol version
2025-06-18
Stores

Store readiness

StoreStatusReason
Claude Connectors Directory Not ready Blocked by Resource metadata "resource" equals the server URL, readOnlyHint or destructiveHint on every tool and Human-readable title on every tool.
ChatGPT app directory Not ready Blocked by readOnlyHint or destructiveHint on every tool, 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

5 checks to fix

  1. Fails

    readOnlyHint or destructiveHint on every tool

    tool_annotations

    Blocks Claude and ChatGPT.

    Measured 13/19 tools set neither readOnlyHint nor destructiveHint: google_checkout_readiness, check_agent_readiness, get_readiness_result, list_readiness_checks, ask_age

    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 14/19 tools miss an explicit hint: get_store_hub, google_checkout_readiness, check_agent_readiness, get_readiness_result, list_readiness_checks and 9 more

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

  3. Fails

    Human-readable title on every tool

    tool_titles

    Blocks Claude and ChatGPT.

    Measured 19/19 without title: check_store, find_stores, report_checkout, get_store_hub, google_checkout_readiness and 14 more

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

  4. Fails

    Resource metadata "resource" equals the server URL

    auth_resource

    Blocks Claude.

    Measured resource https://arcreport.ai/api/mcp is not the server URL https://www.arcreport.ai/api/mcp

    Serve metadata whose "resource" is exactly https://www.arcreport.ai/api/mcp (Claude requires an exact match, path included), e.g. at /.well-known/oauth-protected-resource/api/mcp.

  5. Warning

    Tool descriptions

    tool_descriptions

    Measured 1 under 60 chars: resume_monitor

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

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, initialize latency, serverInfo name and version, Server instructions, tools capability declared, Sign-in method the store supports (OAuth or none), Protected resource metadata (RFC 9728), 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, tools/list returns tools, inputSchema is an object schema, Tool names are valid and portable.

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 ARC

Markdown

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

HTML

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

About this server

Free, no sign-in MCP: can AI agents reach checkout at a store? Try: Use ARC to check allbirds.com
Registry name
ai.arcreport/mcp
Remote URL
https://www.arcreport.ai/api/mcp
Version
2.2.0
Source
github.com/abab7575/arc-mcp
Website
www.arcreport.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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