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TinyFat Docs

What is TinyFat?

TinyFat gives you a personal AI agent that runs 24/7 in the cloud. You email it, it thinks, it replies. No apps to install, no complex setup — just email.

The core idea

Section titled “The core idea”

Your agent is a full Linux container running pi-mono, an open-source agent framework. It has:

  • Its own email address — [email protected]
  • Persistent filesystem — Files survive restarts
  • Memory — A MEMORY.md file that persists your agent’s context
  • Skills — Pre-installed tools for web scraping, API calls, and more
  • Full shell access — Run any Linux command

How it works

Section titled “How it works”
  1. You email your agent — Send to [email protected]
  2. Agent wakes up — Container starts automatically (scale-to-zero)
  3. Agent thinks — Reads your email, decides what to do
  4. Agent responds — Writes a reply to its outbox
  5. You get the email — Platform delivers the response

What makes TinyFat different?

Section titled “What makes TinyFat different?”

Radical transparency

Section titled “Radical transparency”

We don’t hide the implementation. Your agent runs pi-mono in a Fly.io container. The code is open source. You can inspect everything.

BYOK (Bring Your Own Key)

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You provide your own Anthropic API key. We don’t markup API costs. You pay Anthropic directly, at their rates.

Simple pricing

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Free during launch. After launch: one flat monthly fee. No per-message charges, no usage caps.

Escape hatch

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Want to run this yourself? Everything is open source. Export your data anytime. We’ll even tell you how to set it up on your own infrastructure.

What can your agent do?

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Out of the box:

  • Answer questions using its knowledge base
  • Browse the web with Firecrawl integration
  • Track issues in Linear
  • Read and write files in its workspace
  • Run shell commands for automation
  • Remember context across conversations

With your API keys:

  • Manage Notion pages
  • Post to Slack (hybrid mode)
  • More integrations as you add them

Next steps

Section titled “Next steps”