Lime Estimate

{
  "area": 1,
  "asOf": "2026-10-11T23:40:37.300Z",
  "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.",
  "factorTonsPerAcrePerPhUnit": 1.5,
  "illustrative": true,
  "limeProductKgPerHa": 3362.55,
  "limeProductTonsPerAcre": 1.5,
  "notChecked": [
    "real buffer capacity (needs a lab buffer-pH or SMP/Adams-Evans test), organic matter and CEC",
    "magnesium versus calcium needs (dolomitic or calcitic choice)",
    "…3 more"
  ],
  "phChange": 1,
  "pureLimeTonsPerAcre": 1.5,
  "reasons": [
    "Illustrative rule: 1.5 short ton of 100-ECCE lime per acre per pH unit in a 6-inch layer for loam, scaled to 6 inches and divided by 100% ECCE.",
    "These factors are rough planning values, not a published table or a lab method. Get a buffer-pH soil test."
  ],
  "source": "illustrative rule of thumb computed locally (NOT a lab buffer-pH method or a published table)",
  "splitApplicationSuggested": false,
  "summary": "ILLUSTRATIVE: about 1.5 short tons of 100% ECCE lime per acre to raise pH 5.5 to 6.5 on loam soil (not a lab recommendation).",
  "totalProductTons": 1.5,
  "verdict": "ILLUSTRATIVE_ESTIMATE"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://agri-calc.x402tookit.com/lime-estimate?currentPh=5.5&targetPh=6.5&texture=loam'

# 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://agri-calc.x402tookit.com/lime-estimate?currentPh=5.5&targetPh=6.5&texture=loam' \
  | 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%2Fagri-calc.x402tookit.com%2Flime-estimate
const res = await pay("https://agri-calc.x402tookit.com/lime-estimate?currentPh=5.5&targetPh=6.5&texture=loam");
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://agri-calc.x402tookit.com/lime-estimate?currentPh=5.5&targetPh=6.5&texture=loam")
    print(res.status_code, res.text)