Capacity Planning

{
  "asOf": "2026-10-11T20:19:38.922Z",
  "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.",
  "headroomPercentOverPeak": 60,
  "loadAtWhichTotalSaturates": 8000,
  "notChecked": [
    "whether capacityPerUnit was measured under realistic load (synthetic benchmarks overstate it)",
    "non-linear scaling: coordination, shared databases and caches mean 2x units rarely gives 2x capacity",
    "…2 more"
  ],
  "reasons": [
    "Units for load = ceil(peak / (capacity x target utilisation)); spares are added on top so a failure does not push the survivors over target.",
    "Check the post-failure utilisation: if it exceeds your latency knee (often 80 to 85%), add a spare."
  ],
  "source": "computed locally",
  "spareUnits": 1,
  "summary": "Peak 5000 at 800 per unit and a 70% utilisation target needs 9 units, 10 with 1 spare; after losing 1 unit utilisation is 69.44%.",
  "unitsForLoad": 9,
  "unitsTotal": 10,
  "usableCapacityPerUnit": 560,
  "utilizationAfterLosingOneUnitPercent": 69.44,
  "utilizationAfterLosingSparesPercent": 69.44,
  "utilizationAtTargetWithNeedOnlyPercent": 69.44,
  "utilizationNormalPercent": 62.5,
  "verdict": "RESILIENT"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://data-calc.x402tookit.com/capacity-planning?capacityPerUnit=800&peakLoad=5000&spareUnits=1&targetUtilizationPercent=70'

# 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://data-calc.x402tookit.com/capacity-planning?capacityPerUnit=800&peakLoad=5000&spareUnits=1&targetUtilizationPercent=70' \
  | 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%2Fdata-calc.x402tookit.com%2Fcapacity-planning
const res = await pay("https://data-calc.x402tookit.com/capacity-planning?capacityPerUnit=800&peakLoad=5000&spareUnits=1&targetUtilizationPercent=70");
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://data-calc.x402tookit.com/capacity-planning?capacityPerUnit=800&peakLoad=5000&spareUnits=1&targetUtilizationPercent=70")
    print(res.status_code, res.text)