LaunchCheck x402 MCP Server

by apolito53 Your server? Claim it

answering

LaunchCheck x402 is answering right now. Last checked 11 min ago. It exposes 1 tools.

Paid x402 MCP tool for stress-testing launch and marketing copy before publication.

Uptime history 34 days of history

34 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

380 ms

Response time

average over 24h

open, no key

Access

streamable-http

What changed 1

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 17 August 2026. No other catalogue keeps this.

17 Aug a tool description was rewritten reaction_check

Nothing serious here today

Today is the operative word: we check LaunchCheck x402 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 11 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add launchcheck-x402 --transport http https://launchcheck-x402.fly.dev/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "launchcheck-x402": {
      "url": "https://launchcheck-x402.fly.dev/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.launchcheck-x402]
url = "https://launchcheck-x402.fly.dev/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "launchcheck-x402": {
      "url": "https://launchcheck-x402.fly.dev/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "launchcheck-x402": {
      "url": "https://launchcheck-x402.fly.dev/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.

reaction

reaction_check

Review and stress-test launch messaging, landing pages, product announcements, pricing pages, changelogs, app-store listings, and marketing emails before publication. LaunchCheck evaluates copy through eight audience lenses, surfaces positioning and conversion friction, flags claims needing evidence, predicts likely reader questions, recommends concrete changes, and returns a fact-preserving rewrite. Requires $0.50 via x402 on Base.

Endpoints

URL	Transport	State	Latency	Checked
https://launchcheck-x402.fly.dev/mcp	streamable-http	answering	302 ms	11 min ago

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LaunchCheck x402 — questions

Answers built from our own checks of this server.

What can LaunchCheck x402 do?

It exposes 1 tools, read directly from the server on our last check. Among them: reaction_check. 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 LaunchCheck x402 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 380 ms. The bar chart above shows every period we have measured.

How do I connect LaunchCheck x402?

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

Does LaunchCheck x402 need an API key?

No. LaunchCheck x402 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 LaunchCheck x402?

It answers our handshake in 380 ms on average, which is faster than 40% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.