Preflight MCP Server

by evanfollis Your server? Claim it

answering

Preflight is answering right now. Last checked 8 min ago. It exposes 1 tools. Last commit 5 Sep 2026.

Check if your MCP server is ready to publish on the MCP Registry, Smithery, or npm.

Uptime history 91 days of history · worst day 94%

91 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

666 ms

Response time

average over 24h

Stars

last commit 5 Sep 2026

Nothing serious here today

Today is the operative word: we check Preflight every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 8 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add preflight --transport http https://skillfoundry.synaplex.ai/products/preflight/mcp/

Settings → Connectors → Add custom connector, then paste this address

https://skillfoundry.synaplex.ai/products/preflight/mcp/

~/.codex/config.toml

[mcp_servers.preflight]
url = "https://skillfoundry.synaplex.ai/products/preflight/mcp/"

.cursor/mcp.json

{
  "mcpServers": {
    "preflight": {
      "url": "https://skillfoundry.synaplex.ai/products/preflight/mcp/"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "preflight": {
      "type": "http",
      "url": "https://skillfoundry.synaplex.ai/products/preflight/mcp/"
    }
  }
}

Available tools 1

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

publish

check_publish_readiness

Validate whether an MCP server is publishable on real directories (MCP Registry, Smithery, npm). Provide raw artifact contents. Returns evidence-backed findings with source-linked directory rules.

Endpoints

URL	Transport	State	Latency	Checked
https://skillfoundry.synaplex.ai/products/preflight/mcp/	streamable-http	answering	611 ms	8 min ago

Alternatives to Preflight

same job, measured the same way

Rust MCP Preflight

by wolfe-jam

Check an MCP Registry listing before you publish: README mcp-name line, server.json, name.

local only

Publish MCP Server

by marlenezw

An MCP server that helps developers publish their MCP servers to the registry

113 installs/wk local only

Livenxmcp

by bdimic-bluecat

MCP server for LiveAction LiveNX (quay.io / MCP registry test publish)

local only

Registry Lag — how fast MCP directories reflect a new server

by rowb-registry-lag

Checks whether an MCP server is listed in MCP directories right now, and how long the listing took.

2 tools answering

MCP Registry Server

by com-mcp

Publish and discover MCP servers via the official MCP Registry. Powered by HAPI MCP server.

3 tools answering

MCP Registry MCP Server

by wei

MCP server for querying the official MCP registry.

40 installs/wk local only

Site

by co-cqcregistrationchecker

CQC Registration Checker: the site's own MCP server — checker, enquiry (enquiry = a human...

6 tools answering

MCPfinder - MCP Server Discovery

by mcpfinder

Your AI discovers and installs MCP servers across Official Registry, Glama, and Smithery.

261 installs/wk local only

Preflight — questions

Answers built from our own checks of this server.

What can Preflight do?

It exposes 1 tools, read directly from the server on our last check. Among them: check_publish_readiness. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Preflight working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 666 ms. The bar chart above shows every period we have measured.

How do I connect Preflight?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Preflight need an API key?

No. Preflight completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 1 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Preflight?

It answers our handshake in 666 ms on average, which is faster than 15% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Preflight open source?

We cannot say either way: written in Python and 0 stars on GitHub, but we could not determine the licence, and without one the code is not open source by default.