Bracelet Size

{
  "allFitsInches": {
    "comfortable": 7.5,
    "loose": 8,
    "snug": 6.75,
    "standard": 7
  },
  "asOf": "2026-10-12T01:40:58.474Z",
  "bodyLengthInches": 6.5,
  "circumferenceCm": 16.51,
  "circumferenceInches": 6.5,
  "degraded": false,
  "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
  "easeInches": 0.5,
  "finishedLengthCm": 17.78,
  "finishedLengthInches": 7,
  "fit": "standard",
  "notChecked": [
    "wrist bone size, which may need a bigger ease than the table",
    "flexible versus rigid bangles (a rigid bangle must clear the hand, so measure that separately)",
    "…1 more"
  ],
  "reasons": [
    "Ease for standard fit is 0.5 in.",
    "The 0.5 in clasp is counted inside the total."
  ],
  "source": "computed locally (circumference + ease)",
  "summary": "For a 6.5 in wrist at standard fit make the bracelet 7 in (17.8 cm) including the clasp; 6.5 in of chain or beads.",
  "verdict": "COMPUTED"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://jewelry-calc.x402tookit.com/bracelet-size?circumferenceInches=6.5&fit=standard'

# 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://jewelry-calc.x402tookit.com/bracelet-size?circumferenceInches=6.5&fit=standard' \
  | 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%2Fjewelry-calc.x402tookit.com%2Fbracelet-size
const res = await pay("https://jewelry-calc.x402tookit.com/bracelet-size?circumferenceInches=6.5&fit=standard");
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://jewelry-calc.x402tookit.com/bracelet-size?circumferenceInches=6.5&fit=standard")
    print(res.status_code, res.text)