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Hydrology & Open-Channel Calc

■ Live

Critical depth where Froude number is 1 (Q^2/g = A^3/T) for rectangular, trapezoidal, triangular or circular channels.

Listed price
$0.02
Live
1 of the last check
Median response
172 ms
Last checked
2 Nov, 00:23 UTC
In our index since
2 Nov 2026

Endpoint

curl -i https://hydrology-calc.x402tookit.com/critical-depth
# 402 Payment Required: pay with an x402 client (USDC on Arbitrum),
# then send the same request again with the payment attached.
8 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://hydrology-calc.x402tookit.com

  • GET/normal-depthNo price listedNormal (uniform-flow) depth for a given discharge in a rectangular, trapezoidal, triangular or circular channel by bisection.
  • GET/weir-flowNo price listedDischarge over a sharp-crested rectangular (Francis), V-notch or Cipolletti weir from head, SI or US units.
  • GET/critical-depthNo price listedCritical depth where Froude number is 1 (Q^2/g = A^3/T) for rectangular, trapezoidal, triangular or circular channels.
  • GET/rational-methodNo price listedPeak runoff Q = C i A by the rational method, from a runoff coefficient, surface type or weighted sub-areas, SI or US.
  • GET/orifice-flowNo price listedOrifice discharge Q = Cd A sqrt(2 g h) for a round or given-area opening, with typical Cd by edge type, SI or US.
  • GET/froude-numberNo price listedFroude number V / sqrt(g A/T) and flow regime (subcritical, critical, supercritical) for an open-channel section.
  • GET/time-of-concentrationNo price listedTime of concentration by the Kirpich formula and the NRCS lag equation, with the limits of each stated.
  • GET/manning-flowNo price listedManning flow, velocity and hydraulic radius for rectangular, trapezoidal, triangular or part-full circular channels, SI or US.

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Showing 8 of 8 listed endpoints.

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

Recent checks

2 Nov 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 the endpoint was not live. “Live” means it answered with HTTP 402 or another detected payment-challenge signal.2 Nov 2026
All 1 checks
When (UTC)ResultHTTPResponse
2 Nov, 00:23 UTCLive402172ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 2 Nov, 00:23 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 Hydrology & Open-Channel Calc?

Its listed price is $0.02.

What payment terms does Hydrology & Open-Channel 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 Hydrology & Open-Channel Calc listed?

In x402 Bazaar. Superstables first indexed it on 2 Nov 2026.

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