Npk Blend

{
  "analysis": "23-11.5-15",
  "asOf": "2026-10-11T23:40:37.552Z",
  "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.",
  "elementalKPct": 12.4515,
  "elementalPPct": 5.0186,
  "fillerOrOtherPct": 50.5,
  "k2oPct": 15,
  "nPct": 23,
  "notChecked": [
    "secondary and micronutrients, sulfur, and fillers beyond the weights given",
    "physical compatibility, particle size and segregation of the mix",
    "…2 more"
  ],
  "nutrientTotalPct": 49.5,
  "p2o5Pct": 11.5,
  "reasons": [
    "Each nutrient percentage is the weight-weighted average of the components.",
    "Nutrient total is 49.5% of weight; the rest is carriers and filler."
  ],
  "source": "computed locally (weighted average of nutrient percentages)",
  "summary": "Blend analysis 23-11.5-15 (N-P2O5-K2O) over 100 total weight.",
  "totalWeight": 100,
  "verdict": "BLEND_ANALYSIS_COMPUTED"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://agri-calc.x402tookit.com/npk-blend?components=46-0-0%3A50%2C0-46-0%3A25%2C0-0-60%3A25'

# 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/npk-blend?components=46-0-0%3A50%2C0-46-0%3A25%2C0-0-60%3A25' \
  | 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%2Fnpk-blend
const res = await pay("https://agri-calc.x402tookit.com/npk-blend?components=46-0-0%3A50%2C0-46-0%3A25%2C0-0-60%3A25");
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/npk-blend?components=46-0-0%3A50%2C0-46-0%3A25%2C0-0-60%3A25")
    print(res.status_code, res.text)