How do I use McpStamp Check?

This server has a remotely hosted endpoint. Open its connector listing for connection details, authentication requirements, and setup instructions: * McpStamp Check

McpStamp Check

by theluckystrike

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JavaScript

Remote

McpStamp Check

Score any remote MCP server for readiness for the Claude Directory, ChatGPT Apps, Gemini Connected Apps and the MCP Registry: a 0-100 score, an A-F grade, per-store readiness and a one-line fix for every failing check.

Try it: https://www.mcpstamp.com/check/

Badge

After a check, embed your badge in your README (<id> is in the check result):

[![McpStamp](https://www.mcpstamp.com/badge/<id>.svg)](https://www.mcpstamp.com/check/?id=<id>)

The badge shows McpStamp | 87 B, coloured by grade, or a grey unchecked.

Related MCP server: MCP Scorecard

MCP server

McpStamp Check is itself a remote MCP server (Streamable HTTP, protocol 2025-11-25, no sign-in):

https://mcp.zovo.one/stamp/mcp

Tool	What it does
`check_mcp_server(url, fresh?)`	Score, grade, readiness per store, every failing check with its fix, report URL and badge markdown
`explain_check(check_id)`	What a check means, which stores it blocks, and the store or spec source

Add it to your client:

# Claude Code
claude mcp add --transport http mcpstamp https://mcp.zovo.one/stamp/mcp

// Cursor: ~/.cursor/mcp.json
{ "mcpServers": { "mcpstamp": { "url": "https://mcp.zovo.one/stamp/mcp" } } }

// VS Code: .vscode/mcp.json
{ "servers": { "mcpstamp": { "type": "http", "url": "https://mcp.zovo.one/stamp/mcp" } } }

Then ask: "Check https://example.com/mcp with McpStamp". Live checks share the API limit (20 per hour per client). It is listed in the MCP Registry as io.github.theluckystrike/mcpstamp-check.

GitHub Action

Gate your CI on readiness. The action calls the public API, writes a job summary (score, stores, fixes) and fails the step when the score is below min-score or a store in fail-on-store is not ready.

name: McpStamp Check
on:
  workflow_dispatch:
  push:
    branches: [main]
jobs:
  mcpstamp:
    runs-on: ubuntu-latest
    timeout-minutes: 5
    steps:
      - uses: theluckystrike/mcpstamp-check@v1
        id: stamp
        with:
          url: https://example.com/mcp
          min-score: 80
          fail-on-store: claude,chatgpt
      - run: echo "Score ${{ steps.stamp.outputs.score }} (${{ steps.stamp.outputs.grade }}): ${{ steps.stamp.outputs.report-url }}"

Input	Default	Meaning
`url`	(required)	The https URL of your MCP endpoint
`min-score`	`0`	Fail when the score is below this value
`fail-on-store`	empty	Comma list of `claude`, `chatgpt`, `gemini`, `registry` that must be ready (a store whose blocking checks could not run, for example tools behind sign-in, is not ready)
`fresh`	`true`	`false` accepts a result up to 10 minutes old. On a rate limit the action falls back to the cached result
`api-base`	`https://mcp.zovo.one/stamp`	API base URL

Outputs: score, grade, report-url, badge-url, ready-stores.

The action is a composite action that runs action/run.mjs with the runner's Node.js (18 or later), with no dependencies and no build step. Check a deployed URL: run it after your deploy step.

API

Base URL: https://mcp.zovo.one/stamp (also proxied at https://www.mcpstamp.com/api/).

Request	Response
`GET /api/check?url=<https MCP URL>[&fresh=1]`	Result JSON (cached for 10 minutes)
`GET /api/result/<id>`	Last stored result, 404 if none
`GET /api/checks`	The check table below
`GET /badge?url=<url>` or `GET /badge/<id>.svg`	SVG badge
`POST /mcp`	MCP Streamable HTTP endpoint (see above)

Errors: 400 {error:"bad_url"|"blocked_host"}, 429 {error:"rate_limited", retry_after}, 502 {error:"unreachable", detail}. Limits: 20 live checks per hour per IP; at most 6 HTTP requests to the checked server per check; 8 s timeout and 1 MB body cap per request; https only, ports 443/8443, no IP literals or private names, max 3 redirects (each re-validated).

Proxies

A trusted proxy (the mcpstamp.com Pages Functions) may send x-mcpstamp-proxy-key: <PROXY_KEY secret> and x-mcpstamp-client-ip: <visitor IP> so the rate limit applies per visitor, not per proxy.

Scoring

Each check is pass (1), warn (0.5), fail (0) or skip (not counted). Score = weighted pass ratio over the checks that apply. Grades: A >= 90, B >= 80, C >= 65, D >= 50, else F. Each store gets status: ready (no blocking check failed and none was skipped), unverified (none failed, but a blocking check could not run, for example tools behind sign-in) or not_ready (a blocking check failed). ready is true only for ready. When the tools sit behind sign-in and cannot be inspected, the score is capped at 85.

Check	Group	What it tests	Weight	Counts for	Blocks
`https`	transport	Served over HTTPS	10	claude, chatgpt, gemini, registry	claude, chatgpt, gemini, registry
`initialize`	transport	initialize over Streamable HTTP	15	claude, chatgpt, gemini, registry	claude, chatgpt, gemini, registry
`protocol_version`	transport	Supported protocol version negotiated	6	claude, chatgpt, gemini, registry	gemini
`content_type`	transport	JSON or SSE response Content-Type	3	claude, chatgpt, gemini, registry	-
`jsonrpc_errors`	transport	JSON-RPC error for unknown method	4	claude, chatgpt, gemini, registry	-
`get_stream`	transport	GET answers SSE or 405	3	claude, chatgpt, gemini, registry	-
`latency`	transport	initialize latency	5	claude, chatgpt, gemini, registry	-
`server_info`	metadata	serverInfo name and version	6	claude, chatgpt, gemini, registry	-
`instructions`	metadata	Server instructions	4	claude, chatgpt, gemini	-
`capabilities_tools`	metadata	tools capability declared	3	claude, chatgpt, gemini, registry	-
`auth_challenge`	auth	401 carries WWW-Authenticate resource_metadata	6	claude, chatgpt, gemini	-
`auth_prm`	auth	Protected resource metadata (RFC 9728)	8	claude, chatgpt, gemini	claude, chatgpt
`auth_resource`	auth	Resource metadata "resource" equals the server URL	4	claude, chatgpt, gemini	claude
`auth_as_metadata`	auth	Authorization server metadata (RFC 8414 / OIDC)	8	claude, chatgpt, gemini	claude, chatgpt, gemini
`auth_pkce`	auth	PKCE S256 advertised	6	claude, chatgpt, gemini	claude, chatgpt, gemini
`auth_registration`	auth	Client registration (DCR or Client ID Metadata Documents)	6	claude, chatgpt, gemini	-
`auth_refresh`	auth	refresh_token grant advertised	3	claude, chatgpt, gemini	-
`tools_list`	tools	tools/list returns tools	10	claude, chatgpt, gemini, registry	claude, chatgpt, gemini
`tool_schema`	tools	inputSchema is an object schema	6	claude, chatgpt, gemini, registry	claude, chatgpt, gemini
`tool_names`	tools	Tool names are valid and portable	5	claude, chatgpt, gemini, registry	-
`tool_annotations`	tools	readOnlyHint and destructiveHint on every tool	10	claude, chatgpt, gemini	claude, chatgpt
`tool_open_world`	tools	Explicit readOnlyHint, destructiveHint and openWorldHint (ChatGPT)	5	chatgpt	chatgpt
`tool_titles`	tools	Human-readable title on every tool	5	claude, chatgpt, gemini	claude, chatgpt
`tool_descriptions`	tools	Tool descriptions	6	claude, chatgpt, gemini	-

Every rule is traced to the store or spec text in SOURCES.md.

Use the engine

src/check.mjs is a pure ES module with no dependencies. It runs in Node 20+ and in Cloudflare Workers:

import { checkServer, CHECKS } from './src/check.mjs';
const result = await checkServer('https://example.com/mcp', { fetch, timeoutMs: 8000 });
console.log(result.score, result.grade, result.stores.claude);

CLI: node scripts/check-cli.mjs https://example.com/mcp [--json]

Develop

npm test             # node --test, mock fetch, no network (engine, Worker, MCP endpoint, action)
npx wrangler deploy  # Worker "mcpstamp-check"

Contact: support@zovo.one

License

MIT

This server cannot be deployed

Shareable, User-Owned Context BackendPeople, applications, and agents read, write, and coordinate together in one context lake. Reach it over MCP, a CLI, a Python SDK, or REST.fulcradynamics.comAd

Maintenance

ActivityMaintained

ResponsivenessNo issues

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McpStamp Check

Badge

MCP server

GitHub Action

API

Proxies

Scoring

Use the engine

Develop

License

Maintenance

Resources

Related MCP Connectors

Related MCP Servers

checkyourself

MCP Scorecard

Agent QA

growth-mcp