Discover / hvac-calc.x402tookit.com

HVAC Airflow & Load Calc

■ Challenge detected

Air changes per hour (ACH) from airflow and room volume, or the CFM needed for a target ACH.

Listed price
$0.02
Challenge detected
1 of the last check
Median response
943 ms
Last checked
21 Oct, 00:26 UTC
In our index since
21 Oct 2026

Endpoint

curl -i https://hvac-calc.x402tookit.com/air-changes
# 402 Payment Required: pay with an x402 client (USDC on Arbitrum),
# then send the same request again with the payment attached.
7 listed endpoints · on x402 Bazaar

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

Base URLhttps://hvac-calc.x402tookit.com

  • GET/duct-equivalentNo price listedEquivalent round diameter of a rectangular duct (same friction), or the second side that matches a round duct.
  • GET/air-changesNo price listedAir changes per hour (ACH) from airflow and room volume, or the CFM needed for a target ACH.
  • GET/efficiency-convertNo price listedConvert EER, COP and kW per ton, and tons, BTU/h and kW of cooling capacity.
  • GET/mixed-airNo price listedMixed-air temperature of two airstreams (return plus outside air) and the outside-air fraction.
  • GET/sensible-heatNo price listedSensible heat from airflow and temperature difference (1.08 x CFM x dT), or the CFM needed for a heat load.
  • GET/duct-velocityNo price listedAir velocity (FPM) and velocity pressure (in. wg) in a round or rectangular duct from CFM, or the CFM at a velocity.
  • GET/fan-lawsNo price listedFan affinity laws: new airflow, pressure and power after a speed change (flow ~ N, pressure ~ N^2, power ~ N^3).

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 7 of 7 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/hvac-calc.x402tookit.com

Recent checks

21 Oct 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.21 Oct 2026
All 1 checks
When (UTC)ResultHTTPResponse
21 Oct, 00:26 UTCChallenge detected402943ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 21 Oct, 00:26 UTC, it returned HTTP 402 or another detected payment-challenge signal. This check did not test payment, delivery or compatibility with the Superstables client.

What price is recorded for HVAC Airflow & Load Calc?

Its listed price is $0.02.

What payment terms does HVAC Airflow & Load Calc advertise?

The listing advertises x402, Arbitrum, Base, Polygon, Solana and USDC. It names cdp as its facilitator. Check the seller's current payment challenge and authentication requirements before paying.

Where is HVAC Airflow & Load Calc listed?

In x402 Bazaar. Superstables first indexed it on 21 Oct 2026.

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