Libre CGM Integration

FreeStyle Libre continuous glucose monitors provide glucose data through LibreView or Terra API integration.

OAuth Setup

Prerequisites

1. Set up a LibreView or Terra API account
2. Register your application for CGM data access
3. Set the redirect URI to https://my.loop.health/api/cgm/libre/callback

Environment Variables

LIBRE_CLIENT_ID=your-libre-client-id
LIBRE_CLIENT_SECRET=your-libre-secret
LIBRE_REDIRECT_URI=https://my.loop.health/api/cgm/libre/callback

Supported Devices

Connection Flow

Step 1: Initiate Connection

curl -X GET "https://my.loop.health/api/cgm/libre/connect" \
  -H "Authorization: Bearer $CLERK_JWT"

Redirects the user to the LibreView/Terra authorization page.

Step 2: OAuth Callback

GET /api/cgm/libre/callback?code=AUTH_CODE&state=STATE_TOKEN

Data Collected

Glucose Readings

{
  "metricType": "glucose",
  "source": "libre",
  "metrics": {
    "value": 98,
    "unit": "mg/dL",
    "trend": "flat",
    "scanType": "automatic"
  }
}

Reading Types

Data Sync

Libre data is synced on the same schedule as Dexcom — every 30 minutes via the syncCgmReadings Trigger.dev job.

Libre vs. Dexcom