Get a free API key

50 requests per month, no credit card. Anonymous use stays available: 3 requests/day.

Then check a reading

curl -X POST https://pool-log.rowb.app/api/check -H 'Content-Type: application/json' \
  -H "Authorization: Bearer YOUR_KEY" \
  -d '{"readings":[{"at":"2026-10-01T07:30","kind":"pool","ph":7.4,"free_chlorine_ppm":1.9}]}'

Open a log with POST https://pool-log.rowb.app/api/sites, add readings to it, and print the A4 log sheet from https://pool-log.rowb.app/v/<site_id>/log.svg. A fixed sample is at /v/demo-north-pool.

Or from an AI agent

POST https://pool-log.rowb.app/mcp

That is all you need

Everything on this page is free. No card, no trial, no expiry.