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a2a2p MCP server

com.a2a2p/a2a2p

We checked this server on 2 November 2026 with McpStamp Check engine 1.2.0. It scored 79 of 100 (grade C), higher than 24.9% 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
79C
Sign-in
OAuth
Tools listed
34
Protocol version
2025-03-26
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

7 checks to fix

  1. Fails

    readOnlyHint or destructiveHint on every tool

    tool_annotations

    Blocks Claude and ChatGPT.

    Measured 34/34 tools set neither readOnlyHint nor destructiveHint: open_co_invention_session, follow_co_invention_session, feed_co_invention_session, decide_co_invention

    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 34/34 tools miss an explicit hint: open_co_invention_session, follow_co_invention_session, feed_co_invention_session, decide_co_invention_session, steer_co_inve

    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 34/34 without title: open_co_invention_session, follow_co_invention_session, feed_co_invention_session, decide_co_invention_session, steer_co_invention_session

    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://a2a2p.com/co-invent/mcp is not the server URL https://a2a2p.com/mcp

    Serve metadata whose "resource" is exactly https://a2a2p.com/mcp (Claude requires an exact match, path included), e.g. at /.well-known/oauth-protected-resource/mcp.

  5. Warning

    Supported protocol version negotiated

    protocol_version

    Measured Negotiated 2025-03-26

    Support protocol version 2025-11-25 (or 2025-06-18) and echo it back in initialize.

  6. Warning

    Tool descriptions

    tool_descriptions

    Measured 2 over 2000 chars: review_specification, build_supplier_request_package

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

  7. Warning

    initialize latency

    latency

    Measured 2343 ms

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

19 checks passed, 1 did not run

Passed. Served over HTTPS, initialize over Streamable HTTP, 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), 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

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McpStamp score for a2a2p

Markdown

[![McpStamp score](https://www.mcpstamp.com/badge?url=https%3A%2F%2Fa2a2p.com%2Fmcp)](https://www.mcpstamp.com/r/com-a2a2p-a2a2p/)

HTML

<a href="https://www.mcpstamp.com/r/com-a2a2p-a2a2p/"><img src="https://www.mcpstamp.com/badge?url=https%3A%2F%2Fa2a2p.com%2Fmcp" alt="McpStamp score" height="20"></a>
Registry entry

About this server

Turn agent intent into physical parts: engineering review, measured geometry, calibrated pricing.
Registry name
com.a2a2p/a2a2p
Remote URL
https://a2a2p.com/mcp
Version
1.6.0
Source
github.com/Deadlypillow/a2a2p
Website
a2a2p.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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