Utm Mgrs

{
  "asOf": "2026-10-11T08:41:08.323Z",
  "centralMeridianDeg": -75,
  "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.",
  "gridConvergenceDeg": 0.662142,
  "inRange": true,
  "mgrs": "18TWL8563211326",
  "mgrsCellSizeM": 1,
  "mgrsDigitsPerAxis": 5,
  "mgrsGrid": "18T WL",
  "notChecked": [
    "polar areas: north of 84 N and south of 80 S use UPS, which is not implemented",
    "datums other than WGS84 (NAD83 differs by about 1 m in North America)",
    "…1 more"
  ],
  "reasons": [
    "Standard 6 degree zone.",
    "Grid convergence 0.66214 degrees, point scale factor 0.9996903."
  ],
  "scaleFactor": 0.99969026,
  "source": "Kruger series to 6th order (Karney 2011), WGS84, with NGA MGRS lettering; computed locally",
  "summary": "(40.748433, -73.985656) is UTM 18T 585632.08 E 4511326.15 N, MGRS 18TWL8563211326.",
  "utm": {
    "band": "T",
    "easting": 585632.081,
    "hemisphere": "N",
    "northing": 4511326.154,
    "text": "18T 585632 4511326",
    "zone": 18
  },
  "verdict": "CONVERTED",
  "zoneException": null
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://geo-calc.x402tookit.com/utm-mgrs?digits=5&lat=40.748433&lon=-73.985656'

# 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://geo-calc.x402tookit.com/utm-mgrs?digits=5&lat=40.748433&lon=-73.985656' \
  | 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%2Fgeo-calc.x402tookit.com%2Futm-mgrs
const res = await pay("https://geo-calc.x402tookit.com/utm-mgrs?digits=5&lat=40.748433&lon=-73.985656");
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://geo-calc.x402tookit.com/utm-mgrs?digits=5&lat=40.748433&lon=-73.985656")
    print(res.status_code, res.text)