Local-first CGM MCP for AI agents: Dexcom Developer API + FreeStyle Libre via LibreLink Up.
Local-first CGM MCP for AI agents: Dexcom Developer API + FreeStyle Libre via LibreLink Up.
Local MCP server that exposes CGM data (and synthetic mock data when nothing is configured) to any MCP-aware agent. Two real backends are supported: Dexcom (Developer API, sandbox + production) and FreeStyle Libre (the OTC sensor — Libre 2 / Libre 3) via LibreLink Up. Pick the backend with CGM_PROVIDER; it auto-detects Libre when only Libre credentials are set. Both feed the same ADA time-in-range / GMI / hypo / meal-response engine.
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Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.
| Tool | What it does |
|---|---|
| cgm_agent_manifest | Runtime contract |
| cgm_capabilities | Providers, metrics, privacy modes |
| cgm_connection_status | env, credentials, mode (live vs mock) |
| cgm_privacy_audit | Local storage + outbound destinations |
| cgm_data_inventory | Metric catalog + TIR ranges + GMI formula |
| cgm_glucose_window | All EGVs over last N hours (+ hours_covered — see the Libre ~12h limit) |
| cgm_authorize_url | Dexcom OAuth URL builder |
{
"mcpServers": {
"wellness-cgm": {
"command": "npx",
"args": ["-y", "delx-wellness-hermes"],
"env": {
"DEXCOM_ENV": "your-value",
"DEXCOM_CLIENT_ID": "your-value",
"DEXCOM_CLIENT_SECRET": "your-value",
"DEXCOM_REDIRECT_URI": "your-value",
"CGM_PROVIDER": "your-value",
"LIBRELINKUP_EMAIL": "your-value",
"LIBRELINKUP_PASSWORD": "your-value",
"LIBRELINKUP_REGION": "your-value"
}
}
}
}Add to claude_desktop_config.json, then restart Claude Desktop.
| Variable | Description | Required |
|---|---|---|
| DEXCOM_ENV | Configuration value read at startup. | Optional |
| DEXCOM_CLIENT_ID | Configuration value read at startup. | Optional |
| DEXCOM_CLIENT_SECRET | Credential the server authenticates with. | Yes |
| DEXCOM_REDIRECT_URI | Filesystem location the server is allowed to use. | Optional |
| CGM_PROVIDER | Configuration value read at startup. | Optional |
| LIBRELINKUP_EMAIL | Configuration value read at startup. | Optional |
| LIBRELINKUP_PASSWORD | Configuration value read at startup. | Optional |
| LIBRELINKUP_REGION | Configuration value read at startup. | Optional |
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