Fitness and Body Calculators
fitness-calc.x402tookit.com · 10 paid endpoints · listed 2026-11-02
Running pace per km and per mile, speed, and predicted times for other race distances using the Riegel formula.
Paid endpoints
| Method | Endpoint | Price | Networks |
|---|---|---|---|
| GET | fitness-calc.x402tookit.com/bmi Body mass index from weight and height, metric or imperial, with the WHO adult category and the 18.5 to 24.9 weight range. | $0.02 | Polygon, Arbitrum, Base, Solana |
| GET | fitness-calc.x402tookit.com/bmr-tdee Basal metabolic rate (Mifflin-St Jeor), daily calories by activity level, and a calorie target for a weekly weight change. | $0.02 | Polygon, Arbitrum, Base, Solana |
| GET | fitness-calc.x402tookit.com/body-fat-navy Body fat percentage estimate from tape measurements (US Navy method) with fat mass, lean mass and a general category. | $0.02 | Polygon, Arbitrum, Base, Solana |
| GET | fitness-calc.x402tookit.com/calorie-burn Calories burned by an activity (walking, running, cycling, swimming and more) from MET values, body weight and duration. | $0.02 | Polygon, Arbitrum, Base, Solana |
| GET | fitness-calc.x402tookit.com/due-date Estimated due date, gestational age and trimester from the last period (Naegele rule), with key milestone dates. | $0.02 | Polygon, Arbitrum, Base, Solana |
| GET | fitness-calc.x402tookit.com/heart-rate-zones Estimated maximum heart rate (Tanaka, Fox) and five training zones as percent of max or by heart-rate reserve (Karvonen). | $0.02 | Polygon, Arbitrum, Base, Solana |
| GET | fitness-calc.x402tookit.com/ideal-weight Ideal body weight by the Devine, Robinson, Miller and Hamwi formulas from height and sex, in kg and pounds. | $0.02 | Polygon, Arbitrum, Base, Solana |
| GET | fitness-calc.x402tookit.com/macro-split Protein, carbohydrate and fat grams for a calorie target from a preset or your own percentage split. | $0.02 | Polygon, Arbitrum, Base, Solana |
| GET | fitness-calc.x402tookit.com/one-rep-max Estimated one-rep max from weight and reps by the Epley, Brzycki, Lombardi and O'Conner formulas, with a percentage table. | $0.02 | Polygon, Arbitrum, Base, Solana |
| GET | fitness-calc.x402tookit.com/pace-race Running pace per km and per mile, speed, and predicted times for other race distances using the Riegel formula. | $0.02 | Polygon, Arbitrum, Base, Solana |
Latest checks
| When | Endpoint | HTTP | ms | Result |
|---|---|---|---|---|
| Not checked yet. | ||||
Income on Base (7 days)
This provider's payout address is shared by several providers, so its income is not shown as its own.
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x402_provider_claim (sign with your payout address), and get an alert within minutes when it stops answering with x402_monitor_create ($5 for 30 days). Both work over MCP (https://logicnodes.io/mcp/v2) or POST https://logicnodes.io/v1/tools/<tool>.Income is all USDC received by the provider's payout address on Base, whatever the source. Score: 0-100: 50 x share of checks in the last 72 h that returned valid x402 payment terms + 30 x min(1, log10(1 + USDC received in 7 days) / 4) + 20 x min(1, log10(1 + distinct payers in 7 days) / 3). A provider never checked scores on income only; income is all USDC received by its payout address on Base, whatever the source. JSON: /v1/observatory/providers/fitness-calc.x402tookit.com