Local + RemoteFree

Opentax MCP server

io.github.Invaro/opentax

Verifiable US tax oracle for AI agents: cited, machine-checkable federal and state tax computation

Install Opentax in Claude Code

Remote URL

Claude Code
claude mcp add --transport http opentax https://opentax.invaro.ai/mcp
mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)
{
  "mcpServers": {
    "opentax": {
      "url": "https://opentax.invaro.ai/mcp"
    }
  }
}

npm

Claude Code
claude mcp add opentax -- npx -y @invaro/opentax
mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)
{
  "mcpServers": {
    "opentax": {
      "command": "npx",
      "args": [
        "-y",
        "@invaro/opentax"
      ]
    }
  }
}

Frequently asked questions

What does the Opentax MCP server do?

Verifiable US tax oracle for AI agents: cited, machine-checkable federal and state tax computation

Is the Opentax MCP server free?

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Does Opentax run locally or remotely?

Local + Remote. Can run locally or be used as a hosted remote server.

How do I add Opentax to Claude Code?

Run: claude mcp add --transport http opentax https://opentax.invaro.ai/mcp

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