Ideal Weight

{
  "asOf": "2026-10-11T08:36:50.611Z",
  "average": {
    "kg": 72.33,
    "lb": 159.4
  },
  "degraded": false,
  "devine": {
    "kg": 73,
    "lb": 160.9
  },
  "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
  "hamwi": {
    "kg": 75,
    "lb": 165.3
  },
  "heightCm": 177.8,
  "heightInches": 70,
  "miller": {
    "kg": 70.3,
    "lb": 155
  },
  "notChecked": [
    "frame size, muscle mass, age and ethnicity",
    "that these formulas were written for drug dosing, not for health targets: they are crude",
    "…2 more"
  ],
  "reasons": [
    "Each formula adds a fixed amount per inch above 5 feet (Devine 1974, Robinson 1983, Miller 1983, Hamwi 1964).",
    "These are crude drug-dosing conventions, not health targets: a BMI range is a better guide."
  ],
  "robinson": {
    "kg": 71,
    "lb": 156.5
  },
  "sex": "male",
  "source": "computed locally",
  "summary": "For a male at 70 in (177.8 cm): Devine 73 kg, Robinson 71, Miller 70.3, Hamwi 75; average 72.33 kg.",
  "verdict": "COMPUTED"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://fitness-calc.x402tookit.com/ideal-weight?height=177.8&sex=male'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://fitness-calc.x402tookit.com/ideal-weight?height=177.8&sex=male' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ffitness-calc.x402tookit.com%2Fideal-weight
const res = await pay("https://fitness-calc.x402tookit.com/ideal-weight?height=177.8&sex=male");
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://fitness-calc.x402tookit.com/ideal-weight?height=177.8&sex=male")
    print(res.status_code, res.text)