# Tankfern by CyberMax

> Heating degree day and heating fuel price API for fuel-oil and propane delivery planning: daily heating degree days for US weather stations (NOAA Regional Climate Centers, ACIS) with any base temperature, station search by state, and the latest weekly residential heating oil and propane prices (U.S. Energy Information Administration). Free, no key. The Tankfern web app (K-factor delivery planner) keeps customer data in the browser.

- **Domain**: `tankfern.cybermax-tools.workers.dev`
- **Provider**: CyberMax (https://cybermaxtools.com)
- **A2A protocol version**: 0.3.0
- **Kind**: a2a_agent
- **Live-responds (last probe)**: None
- **Signed card**: False
- **Streaming**: False
- **Quality score**: 90%

## Skills
- **Daily heating degree days for a station** — GET /api/hdd?sid=EWR&start=YYYY-MM-DD&end=YYYY-MM-DD&base=65 returns daily heating degree days from NOAA ACIS, cached 6 hours.
- **Weather stations with degree-day data by state** — GET /api/stations?state=NJ returns stations (name, ids, coordinates) that report heating degree days, cached 6 hours.
- **Weekly residential heating oil and propane prices** — GET /api/prices returns the latest weekly residential No. 2 heating oil and propane prices ($/gal) from EIA (survey runs October-March), cached 12 hours.

## URLs
- Agent card: https://tankfern.cybermax-tools.workers.dev/.well-known/agent-card.json
- Page (HTML): https://agenstry.com/agents/tankfern.cybermax-tools.workers.dev
- Documentation: https://tankfern.cybermaxtools.com/llms.txt