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Bios

Health tracking by chatting with Claude

2026ReleasedTry it outLiveGitHub

Problem

Health and fitness tracking apps fail the same way: they punish you with friction. To log a meal you open an app, pick a food from a database, guess the portion, hit save. Workouts mean another app, another form. Sleep, supplements, mood — yet another tab.

So most people give up after a week. The data you wanted — “am I actually hitting protein, am I sleeping enough, am I training consistently?” — never gets captured because logging is too expensive.

Inspiration

At Network School I went through NS Combine — a fitness test that measures every biomarker you've got. The transformation people went through over 4 weeks was real, and the only thing they did differently was track everything.

Around the same time, MCP made it possible for Claude to talk to your own data. The thought was: what if logging a meal was as cheap as sending a text? Just tell Claude what you ate, let it estimate the macros, confirm, done.

Idea

Bios is an MCP server you connect to Claude. Once it's installed, every conversation can read and write to your personal health log.

Meals
“Had chicken tikka with rice for lunch” → Claude estimates kcal & macros, confirms, logs.
Workouts
Push, pull, legs, run, walk, rest. Logged with a sentence — duration and intensity inferred.
Habits
Sleep, supplements, mood, energy. Anything you want history on.

How it works

  1. Add the connector. In Claude → Connectors → Add custom connector, paste https://bios.mealfix.club/mcp.
  2. Sign in with Google. Each user gets their own isolated account.
  3. Set your goals. “My daily protein goal is 170g, calorie goal is 2500kcal, 4 workouts/week.”
  4. Just start chatting. Log meals and workouts in plain English; ask Claude how you're tracking against your goals at any point.

Why MCP, not another app

  • Zero new UI to learn. The interface is Claude — which you're already in for everything else.
  • Estimation is free. Claude already knows the macros of chicken tikka. No giant food database to maintain, no barcode scanning.
  • The log becomes context. Once your history is reachable from a chat, you can ask follow-up questions: “design me a meal for tonight that hits my remaining protein,” “suggest a deload week.”

Stack

Cloudflare Workers + D1 for the MCP server and storage — free tier indefinitely for solo or small-group use. Each user's data is isolated; the only thing that touches your log is your own Claude.

Mehul Kapadia