TxWhy MCP Server: Install & Setup

Install TxWhy in Claude Code

Claude Code

claude mcp add --transport http txwhy https://txwhy.vercel.app/api/mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "txwhy": {
      "url": "https://txwhy.vercel.app/api/mcp"
    }
  }
}

Frequently asked questions

What does the TxWhy MCP server do?

Failed Solana transaction in, working transaction out. Exact cause, rebuilt tx, verifiable repair.

Is the TxWhy MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does TxWhy run locally or remotely?

Remote. Hosted by the provider. You connect with a URL, nothing to install.

How do I add TxWhy to Claude Code?

Run: claude mcp add --transport http txwhy https://txwhy.vercel.app/api/mcp

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