Discover / bike-calc.x402tookit.com

Bicycle Gearing & Fit Calc

■ Challenge detected

Cadence needed to hold a target speed in a given gear, and the chainring-to-cog ratio needed for a speed at a cadence.

Listed price
$0.02
Challenge detected
1 of the last check
Median response
1435 ms
Last checked
21 Oct, 00:26 UTC
In our index since
21 Oct 2026

Endpoint

curl -i https://bike-calc.x402tookit.com/cadence-for-speed
# 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://bike-calc.x402tookit.com

  • GET/gear-ratioNo price listedGear ratio, gear inches, development per pedal turn and speed at a cadence for a chainring and cog on a given wheel.
  • GET/wheel-sizeNo price listedRolling circumference and diameter for common tyre sizes, or an estimate from rim bead diameter and tyre width in mm.
  • GET/frame-sizeNo price listedRough bike frame size (seat tube cm and S/M/L) from inseam by bike type, with a height-based letter size cross-check.
  • GET/climb-gradientNo price listedGradient percent and angle from rise and distance, plus climbing rate (VAM) and the time to climb at a given rate.
  • GET/cadence-for-speedNo price listedCadence needed to hold a target speed in a given gear, and the chainring-to-cog ratio needed for a speed at a cadence.
  • GET/gear-tableNo price listedGear inches and speed at a cadence for every chainring and cog in a drivetrain, with the range, steps and duplicate gears.
  • GET/chain-lengthNo price listedChain length in links, rounded up to even, from chainstay length and chainring and cog teeth, with the exact figure.
  • GET/saddle-heightNo price listedStarting saddle height from inseam by the LeMond (0.883) and Hamley (1.09) rules, plus the Holmes knee-angle check.

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

Showing 8 of 8 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/bike-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 detected4021435ms

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 Bicycle Gearing & Fit Calc?

Its listed price is $0.02.

What payment terms does Bicycle Gearing & Fit 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 Bicycle Gearing & Fit Calc listed?

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

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