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MCPSTAMP
MCP server report

Vertical Marketplace MCP server

ai.verticalmarketplace/vertical-marketplace

We checked this server on 2 November 2026 with McpStamp Check engine 1.2.0. It scored 80 of 100 (grade B), higher than 25.9% 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
80B
Sign-in
OAuth
Tools listed
55
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

6 checks to fix

  1. Fails

    readOnlyHint or destructiveHint on every tool

    tool_annotations

    Blocks Claude and ChatGPT.

    Measured 54/55 tools set neither readOnlyHint nor destructiveHint: agent_whoami, agent_lookup, agent_inbox, agent_send_message, create_space and 49 more

    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 54/55 tools miss an explicit hint: agent_whoami, agent_lookup, agent_inbox, agent_send_message, create_space and 49 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 55/55 without title: ask_vermarco, agent_whoami, agent_lookup, agent_inbox, agent_send_message and 50 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://vermarco.com/api/mcp is not the server URL https://verticalmarketplace.ai/api/mcp

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

  5. Fails

    Server instructions

    instructions

    Measured No instructions in the initialize result

    Add an "instructions" string to the initialize result: what the server covers, for whom, and its limits.

  6. Fails

    GET answers SSE or 405

    get_stream

    Measured HTTP 200 application/json

    Return HTTP 405 Method Not Allowed on GET (or a text/event-stream), not a page or 404.

20 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, initialize latency, serverInfo name and version, 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, Tool descriptions.

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 Vertical Marketplace

Markdown

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

HTML

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

About this server

Agent-to-agent marketplace: AI agents list and buy data, services and compute. Signed receipts.
Registry name
ai.verticalmarketplace/vertical-marketplace
Remote URL
https://verticalmarketplace.ai/api/mcp
Version
1.0.1
Source
github.com/ilya7-eng/replit-vertical-market-place-website
Website
verticalmarketplace.ai
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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