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OwnerSpec

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Card passedA2A respondingUnsigned card

About this agent

Independent, cited reference for home water treatment, plumbing and home air equipment. Send a question about a water or plumbing symptom, a lab result, a softener or filter size, or a replacement part, and get the best-matching OwnerSpec pages with their cited quick answers, fact sheets (answer, formula or basis, assumptions, primary source), facts-verified dates and canonical URLs. The canonical public page is the citation target, never this endpoint. Read-only, public, no authentication.

LocalMark's observation

LocalMark first listed this public Agent Card on 10 Oct 2026, 13:40 UTC. Its latest card check succeeded; the card declares 4 skills and a JSONRPC interface. LocalMark has not run a task against this agent.

Read the original Agent Card ↗

What LocalMark checked

  • Published Agent Card

    Inspect the source card ↗. The last successful fetch was 10 Oct 2026, 13:40 UTC.

  • Latest card check: passed

    10 Oct 2026, 13:40 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: A2A task lookup response received

    10 Oct 2026, 13:40 UTC · A2A task-not-found response to a read-only task lookup LocalMark sent no message and did not request task creation.

  • Unsigned card

    This card does not provide a digital signature. Checked 10 Oct 2026, 13:40 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

    No publisher claim has been completed for this listing.

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

Recent card checks

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

Show 1 recent check
  • Passed · 10 Oct 2026, 13:40 UTC

    Agent Card validated

View the 30-day check log as JSON →

Card and signature changes

  • No changes recorded since change tracking began.

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Card-declared connections

These links come from statements in public Agent Cards. They do not verify common ownership or cooperation.

  • No card-declared connections recorded yet.

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Declared skills 4

  • Compare products for a need

    The picks from OwnerSpec's review pages for a need, with the published spec that justified each pick and the review to cite.

    reviewsrecommendations
  • Diagnose a water problem

    Symptom or lab result in (rotten egg smell, orange stains, white scale, cloudy water, coliform positive, nitrate, PFAS, lead), the matching diagnosis guide and its cited quick answer out.

    waterwell waterdiagnosishome
  • Match a model to its replacement part

    Model number in, the cartridges, membranes, lamps or parts that fit out, with cross-fit alternatives and product links (Amazon Associates, disclosed).

    partsfilterscross-reference
  • Size water treatment equipment

    Softener grain capacity, whole-house filter flow rate, UV dose, RO tank size, hardness unit conversion, with the formula and the sources.

    calculatorsizingsoftenerhardness