PostHealth · Fitbit-first health data app

One health API.
Every signal.

PostHealth is a Fitbit health data app. Connect Fitbit through Google Health once, then turn your account-scoped health data into a calm dashboard, reliable REST API, and assistant-ready context for ChatGPT, Claude, and Gemini.

Connect Fitbit Explore the demo

Private by defaultGoogle Health permissionsNo medical claimsPrivacy policy

posthealth · request

// one request, your health context
GET /api/v1/summary?days=30

{
  "source": "FITBIT",
  "signals": ["sleep", "steps", "heart"],
  "freshness": "synced 4m ago",
  "derived": ["recovery", "training load"]
}

✓ 200 · account-scoped response120 requests / min

Today · PostHealthLive sync

A clearer picture of your day.

Sleep

7h 36m

+12% vs avg

Steps

9,600

On track

Readiness

88 / 100

Derived

Built for the data you already have

38registered health signals

1account-scoped API

7D–1Ytrend windows

MCPassistant-ready access

How it works

From Fitbit data to useful context in three steps.

PostHealth keeps the connection simple and makes the data useful at every layer: personal view, developer surface, and AI interface.

Connect your Fitbit

Authorize Google Health once. PostHealth keeps your account boundary isolated and shows you when the last sync completed.

Get one clean contract

Read normalized daily rows, timelines, sleep, body, workouts, nutrition, and data-quality signals through one consistent API.

Ask better questions

Use the dashboard, REST API, or MCP-compatible assistants to explore trends without exporting your whole history.

REST API + MCP integrations

Your health data stays addressable.

Connect the REST API to your product, or give ChatGPT, Claude, and Gemini a clean set of account-scoped MCP tools. The data contract stays the same underneath.

Read the API docs Ask PostHealth

REST APIMCPAI clients

// Read a reusable daily health series
GET /api/v1/daily?days=90&types=steps,sleep,weight

Authorization: Bearer POSTHEALTH_API_KEY

// Or connect through the MCP endpoint
POST /mcp

REST API

Typed v1 resources for products, automations, and data exports.

MCP + AI clients

Give ChatGPT, Claude, or Gemini the same account-scoped health context.

Everything you need to understand the signal

Not another pile of charts.

PostHealth brings the useful parts of your Fitbit data into one place, with provenance and caveats attached.

◌

Unified timeline

See sleep, activity, body, nutrition, workouts, and recovery together.

↗

Automatic freshness

Know what is synced, what is delayed, and when an input last arrived.

◒

Sleep analysis

Stages, efficiency, regularity, respiratory context, and transparent estimates.

✦

Recovery context

See the inputs behind a PostHealth-derived readiness estimate.

◈

Body trends

Track weight, body fat, height, and BMI when your source provides them.

⇩

Portable data

Export normalized or raw data for your own analysis and records.

Ask your history

Get sourced, descriptive answers about trends, comparisons, and correlations.

⌁

Personal dashboards

Make your dashboard public or private, then share a read-only URL with a coach, team, or anyone you choose.

Simple pricing

One calm plan for your health workspace.

Private dashboard, API access, exports, and an assistant-ready data surface for one clear monthly price.

PostHealth

$5/month

Everything you need to connect Fitbit and make your data useful.

Billing will connect to Polar later.

For AI assistants

Your assistant already knows how to ask.

Give ChatGPT, Claude, or Gemini a clean interface to your health history. Every response keeps the Fitbit source boundary and derived-value caveats visible.

Context

Return the signals, latest values, period changes, and data quality in one call.

Summary

Ask for a compact view across sleep, recovery, activity, body, workouts, and sync.

Research

Compare periods, align daily series, and calculate descriptive correlations.

PostHealth MCP · private session

How did my sleep compare with my previous 30 days?

Sleep averaged 7h 36m over the selected period.
That is 28 minutes higher than the preceding 30 days, with 24 of 30 days populated. The comparison is descriptive and based on Fitbit-origin sleep intervals.Source: FITBIT · Range: last 30 days · Derived by PostHealth

REST APIMCPChatGPTClaudeGemini

Questions, answered

Clear boundaries are part of the product.

Health data deserves a marketing page that is specific about what it does and does not claim.

Is PostHealth medical advice?

No. It organizes Fitbit-origin data and provides descriptive, transparent calculations. It does not diagnose, treat, or replace qualified medical guidance.

What happens when I connect Fitbit?

PostHealth uses Google Health permissions to sync the Fitbit-origin data you authorize, keeps it isolated to your account, and shows sync freshness in the product.

Can I use my data outside the dashboard?

Yes. Use the account-scoped REST API, CSV or JSON exports, MCP-compatible clients, or ChatGPT, Claude, and Gemini.

Can I share a view with someone else?

Yes. Optional read-only share links and public profiles can expose selected Fitbit trends without API keys or raw payloads, and you can revoke them.

What if a signal is missing?

PostHealth keeps it missing. Availability and coverage are shown explicitly instead of filling gaps with invented values.

Ready to make your health data useful?

Connect Fitbit and get a private, readable view of the signals you already generate.

Connect Fitbit Read the docs

One health API.Every signal.