reaction_check — LaunchCheck x402 MCP Tool
reaction_check
(reaction check) is one of 1 tool on the
LaunchCheck x402
MCP server. Connect the server and your client discovers it on the handshake.
by client
How to call reaction_check from your client
- Claude Code LaunchCheck x402 reaction_check run in your project directory
- Claude Desktop LaunchCheck x402 reaction_check ~/Library/Application Support/Claude/claude_desktop_config.json
- Cursor LaunchCheck x402 reaction_check ~/.cursor/mcp.json
- VS Code LaunchCheck x402 reaction_check .vscode/mcp.json
- Zed LaunchCheck x402 reaction_check ~/.config/zed/settings.json
- Windsurf LaunchCheck x402 reaction_check ~/.codeium/windsurf/mcp_config.json
- Cline LaunchCheck x402 reaction_check ~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json
- Gemini CLI LaunchCheck x402 reaction_check ~/.gemini/settings.json
- Grok LaunchCheck x402 reaction_check .mcp.json (in your project root)
- ChatGPT LaunchCheck x402 reaction_check Settings → Connectors → Advanced → Developer mode
- Claude.ai LaunchCheck x402 reaction_check Settings → Connectors → Add custom connector
- LangChain LaunchCheck x402 reaction_check pip install langchain-mcp-adapters
Fastest route
claude mcp add --transport http launchcheck-x402 https://launchcheck-x402.fly.dev/mcp
This list was read from the server itself, by connecting to it and calling tools/list on 24 September 2026. It is what
the server actually exposes, not what its listing claims.
Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. The registry stores tool names only; connect the server for its live schemas.