Calc Required Price

{
  "assumptions": [
    "粗利率は売価に対する比率（(売価 − 総原価) ÷ 売価）",
    "入力されていない原価要素は0円として合計している。実際に発生する要素があるかは missingElements の確認質問で確かめる",
    "missingElements は入力との差分であり、原価に含めるべきかの評価ではない。含めるかどうかは利用者が決める",
    "円未満は切り上げ。整数演算で計算し、浮動小数点の誤差を含まない"
  ],
  "disclaimer": "本結果は入力値に基づく計算結果の提供であり、経営・融資・税務・会計・投資・申請等の判断や助言ではありません。可否・合否・推奨は返しません。判断の基準は利用者が定め、必要に応じて専門家に確認してください。",
  "result": {
    "costBreakdown": [
      {
        "amount": 120000,
        "key": "material",
        "label": "材料"
      },
      {
        "amount": 48000,
        "key": "processing",
        "label": "加工"
      },
      {
        "amount": 5000,
        "key": "transport",
        "label": "運搬"
      },
      {
        "amount": 30000,
        "key": "outsourcing",
        "label": "外注"
      }
    ],
    "currentGrossMarginRatio": 0.188,
    "currentQuote": 250000,
    "missingElements": [
      {
        "key": "setup",
        "label": "段取り",
        "question": "治具の取り付けや試し加工の時間は入っていますか？",
        "whyOftenMissed": "1回ごとの準備時間を加工時間に含めていない"
      },
      {
        "key": "inspection",
        "label": "検査",
        "question": "寸法確認・外観検査の時間は入っていますか？",
        "whyOftenMissed": "「ついで」にやる検査が0円になる"
      },
      {
        "key": "packing",
        "label": "梱包",
        "question": "梱包の時間と資材の費用は入っていますか？",
        "whyOftenMissed": "梱包材と作業時間の両方が漏れる"
      },
      {
        "key": "drawing",
        "label": "図面",
        "question": "図面の作成・修正の時間は入っていますか？",
        "whyOftenMissed": "図面起こし・確認の時間を見積に入れない"
      },
      {
        "key": "tooling",
        "label": "工具",
        "question": "この案件のためだけに買う刃物・治具はありますか？",
        "whyOftenMissed": "案件専用の刃物・治具の費用を固定費扱いにする"
      }
    ],
    "priceGap": 40000,
    "requiredPrice": 290000,
    "totalCost": 203000
  },
  "source": "https://ismec.jp/cost-management/",
  "tool": "required_price",
  "trace": [
    "加工費 = 8時間 × 6000円 → 円未満切り上げ 48000",
    "総原価 = 入力された原価要素の合計 = 203000",
    "必要売価 = 総原価 ÷ (1 − 目標粗利率) = 203000 ÷ (1 − 0.3) → 円未満切り上げ 290000",
    "値上げ必要額 = max(必要売価 − 現在の見積額, 0) = max(290000 − 250000, 0) = 40000",
    "現在の見積額での粗利率 = (見積額 − 総原価) ÷ 見積額 = (250000 − 203000) ÷ 250000 = 0.188"
  ]
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://ismec-agent-tools.ismec.workers.dev/v1/calc/required-price' \
  -H 'content-type: application/json' \
  --data-raw '{"costs":{"material":120000,"outsourcing":30000,"processing":{"hourlyRate":6000,"hours":8},"transport":5000},"currentQuote":250000,"includedElements":[],"targetGrossMarginRatio":0.3}'

# 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 - -X POST 'https://ismec-agent-tools.ismec.workers.dev/v1/calc/required-price' \
  -H 'content-type: application/json' \
  --data-raw '{"costs":{"material":120000,"outsourcing":30000,"processing":{"hourlyRate":6000,"hours":8},"transport":5000},"currentQuote":250000,"includedElements":[],"targetGrossMarginRatio":0.3}' \
  | 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 $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
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 $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fismec-agent-tools.ismec.workers.dev%2Fv1%2Fcalc%2Frequired-price&method=POST
const res = await pay("https://ismec-agent-tools.ismec.workers.dev/v1/calc/required-price", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "costs": {
      "material": 120000,
      "outsourcing": 30000,
      "processing": {
        "hourlyRate": 6000,
        "hours": 8
      },
      "transport": 5000
    },
    "currentQuote": 250000,
    "includedElements": [],
    "targetGrossMarginRatio": 0.3
  }),
});
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 $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://ismec-agent-tools.ismec.workers.dev/v1/calc/required-price",
        json={
            "costs": {
                "material": 120000,
                "outsourcing": 30000,
                "processing": {
                    "hourlyRate": 6000,
                    "hours": 8,
                },
                "transport": 5000,
            },
            "currentQuote": 250000,
            "includedElements": [],
            "targetGrossMarginRatio": 0.3,
        },
    )
    print(res.status_code, res.text)