Parameters

None. This tool takes no arguments.

Output

A markdown table rather than JSON — roughly a third of the tokens, and models reason over rows more reliably than nested objects.

Notes and gotchas

Requires a connected Withings account. Connect it from your dashboard — no developer account needed.
Read-only: this tool cannot change anything in your account.

Call it directly

The endpoint is plain JSON-RPC, so you can test without any client:

curl

curl -s https://fitnesspeak.app/mcp \
  -H "Authorization: Bearer fp_live_YOUR_KEY_HERE" \
  -H "Content-Type: application/json" \
  -d '{
       "jsonrpc": "2.0",
       "id": 1,
       "method": "tools/call",
       "params": {
         "name": "withings_devices",
         "arguments": {}
       }
     }'

Tool description the model sees

The Withings devices linked to the account: model, type, battery level and when each last synced. Call this to work out why data is missing — a device that has not synced in weeks explains an empty table — or when the user asks what hardware they have or whether a battery is low.

Descriptions say when to call a tool, not just what it does — that trigger wording is what models actually route on.

`withings_devices`