Drip Irrigation

{
  "asOf": "2026-10-11T20:20:02.470Z",
  "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.",
  "efficiencyPercent": 90,
  "gallonsPerSqFtPerInch": 0.6234,
  "gallonsPerWatering": 23.1,
  "hoursPerWatering": 0.92,
  "hoursPerWeek": 2.77,
  "inchesPerHourApplied": 0.3609,
  "maxEmittersOnThisSupply": 240,
  "minutesPerWatering": 55,
  "notChecked": [
    "rain: subtract the rain that fell (a 1 inch a week target includes rainfall)",
    "soil type, plant size and weather, which change the real need by a factor of two or more across the season",
    "…2 more"
  ],
  "reasons": [
    "1 inch of water over 1 square foot is 144 cubic inches = 0.6234 gallons.",
    "Run time = water per watering / system flow; keep a zone's flow under 80% of the measured supply flow."
  ],
  "source": "computed locally",
  "summary": "100 sq ft at 1 inch a week needs 62.3 gallons (69.3 with 10% losses). 25 emitters at 1 gph deliver 25 gph, so 3 waterings take about 55 minutes each. The 0.42 gpm system fits within 80% of the 5 gpm s…",
  "supplyGpm": 5,
  "systemFlowGph": 25,
  "systemFlowGpm": 0.417,
  "systemFlowWithinSupply": true,
  "usableSupplyGpmAt80Percent": 4,
  "verdict": "COMPUTED",
  "wateringsPerWeek": 3,
  "weeklyLitres": 262,
  "weeklyWaterGallons": 62.3,
  "weeklyWaterGallonsAfterLosses": 69.3
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://garden-calc.x402tookit.com/drip-irrigation?areaSqFt=100&emitterCount=25&emitterGph=1&inchesPerWeek=1&supplyGpm=5&wateringsPerWeek=3'

# 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://garden-calc.x402tookit.com/drip-irrigation?areaSqFt=100&emitterCount=25&emitterGph=1&inchesPerWeek=1&supplyGpm=5&wateringsPerWeek=3' \
  | 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%2Fgarden-calc.x402tookit.com%2Fdrip-irrigation
const res = await pay("https://garden-calc.x402tookit.com/drip-irrigation?areaSqFt=100&emitterCount=25&emitterGph=1&inchesPerWeek=1&supplyGpm=5&wateringsPerWeek=3");
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://garden-calc.x402tookit.com/drip-irrigation?areaSqFt=100&emitterCount=25&emitterGph=1&inchesPerWeek=1&supplyGpm=5&wateringsPerWeek=3")
    print(res.status_code, res.text)