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Tankfern by CyberMax

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About this agent

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.

LocalMark's observation

LocalMark first listed this public Agent Card on 11 Oct 2026, 20:40 UTC. Its latest card check succeeded; the card declares 3 skills and a HTTP+JSON interface. LocalMark has not run a task against this agent.

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What LocalMark checked

  • Published Agent Card

    Inspect the source card ↗. The last successful fetch was 11 Oct 2026, 20:40 UTC.

  • Latest card check: passed

    11 Oct 2026, 20:40 UTC · Agent Card validated

  • Advertised endpoint: TLS connection not yet checked

    Not yet checked · A future cycle will check TLS connectivity. This does not test the A2A protocol or run a task.

  • Read-only protocol probe: Protocol response unconfirmed

    11 Oct 2026, 20:40 UTC · Endpoint did not return an A2A task-not-found response LocalMark sent no message and did not request task creation.

  • Unsigned card

    This card does not provide a digital signature. Checked 11 Oct 2026, 20:40 UTC.

  • 30-day card check history

    1 of 1 recorded card checks passed in the last 30 days. These are periodic observations, not continuous uptime monitoring.

  • Publisher claim

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Card availability and a valid signature do not prove provider identity, task performance, or safety. LocalMark has not executed a task against this agent.

Also observed in public indexes

LocalMark found this card URL in these sources. Last observed does not confirm a current listing or shared ownership.

Recent card checks

Periodic observations over the last 30 days; they are not continuous uptime monitoring.

Show 1 recent check
  • Passed · 11 Oct 2026, 20:40 UTC

    Agent Card validated

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Card and signature changes

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Card-declared connections

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Declared skills 3

  • 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.

    degree daysheating oilpropanek-factorfuel delivery
  • 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.

    degree daysheating oilpropanek-factorfuel delivery
  • 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.

    degree daysheating oilpropanek-factorfuel delivery