About

Founder & CEO at Kafkai Giken and Mirakuru Europa, building Kafkai, KaiMail and PuchiDen. Previously founded and sold Xoxzo (telephony API company) to Accrete Inc. Python Software Foundation Fellow, co-founder of PyCon JP & PyCon MY Based in Tokyo, but works remotely. Focused on creating AI tools that solve real business problems. I hope to bring some of the revolution technology continues to give us in a form that is beneficial and understandable to the rest of us.

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Maker History

  • MCPNavi
    MCPNaviMCP services: connect your AI agent to data and tools
    Oct 2026
  • PuchiDen
    PuchiDenInternational calls from your browser. No app, no account.
    Jun 2026
  • KaiMail
    KaiMailCustom domain emails, simplified
    Mar 2026
  • Kafkai
    KafkaiAsk your AI about any site. Get answers from real data.
  • 🎉
    Joined Product HuntJuly 23rd, 2021

Forums

Which MCP servers should mcpnavi list next?

MCPNavi lists 249 MCP services today, across 22 categories. Each listing shows hosting, authentication, transport, pricing and Japanese support. Every value is read from a public page, and every service shows the date it was last checked.

I want to grow the list in the order that helps people most, so I have two questions for this thread.

  1. Which MCP server do you use that is not listed yet? Paste the repository or the official page. That is all I need, because every value is read from public pages.

  2. When you pick an MCP server, which fact do you look for first? Hosted or self-run? OAuth or API key? Price? Japanese documentation?

MCPNavi - MCP services: connect your AI agent to data and tools

A directory of MCP services that connect AI agents like ChatGPT and Claude to data and tools. Every service lists compatible agents and connection methods. All data is read from public pages, and every service shows the date it was last checked.

Does PuchiDen handle bank IVR menus and in-call keypad tones?

Rebtel and Google Voice fall short on the one thing that is much needed: reliable in-call keypad tones (DTMF) for IVR menus. Rebtel's own help docs say they don't support toll-free numbers or switchboards, and the dial pad often stops working mid-call. Google Voice has the same problem; keypad presses simply not register with automated systems, which is a dealbreaker when you're trying to reach a bank or a government line.

Does PuchiDen handle this properly? Can you navigate phone menus during an active call, including from a phone browser, not just a laptop keyboard?

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