Micro Materials Optical Bandgap Fit

{
  "amountBaseUnits": "109001",
  "boundaries": [
    "Public or synthetic inputs only. Caller labels are declarations,…"
  ],
  "inputDigest": "sha256:5305285dfc93d851efc37ee098ac8618f40a840979f84f44bc26b5388…",
  "offerId": "materials-optical-bandgap-fit",
  "receiptDigest": "sha256:0aaaa6aed0d3be49e2d24c58af2cd1ccd1b209808fdaa71a4b2fe1e75…",
  "result": {
    "findings": {
      "bandgapEV": 1,
      "fitWindowSensitivityEV": 0,
      "method": "Tauc linear extrapolation: (alpha*E)^2 direct allowed, ^0.5 indi…",
      "transformedFit": {
        "degreesOfFreedom": 3,
        "intercept": -1,
        "rSquared": 1,
        "residualStandardError": 3.45182366138e-16,
        "residuals": [
          3.33066907388e-16
        ],
        "slope": 1,
        "slopeStandardError": 2.18312497025e-16
      },
      "transition": "direct-allowed",
      "trimmedWindowBandgapEV": 1
    },
    "limitations": [
      "Public or synthetic research inputs only; no patient, personal g…"
    ],
    "methodVersion": "maha-science50/1.0.0",
    "numericPrecision": "IEEE754-double; finite outputs rounded to 12 significant digits"
  },
  "version": "maha-microproducts/0.1"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://www.mahastrategies.com/api/v1/micro/materials-optical-bandgap-fit' \
  -H 'content-type: application/json' \
  --data-raw '{"absorptionPerM":[0.47140452079103173,0.5,0.4898979485566356,0.47140452079103173,0.45175395145262565],"dataClass":"synthetic","energyEV":[1.5,2,2.5,3,3.5],"fitEndIndex":4,"fitStartIndex":0,"transition":"direct-allowed"}'

# 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://www.mahastrategies.com/api/v1/micro/materials-optical-bandgap-fit' \
  -H 'content-type: application/json' \
  --data-raw '{"absorptionPerM":[0.47140452079103173,0.5,0.4898979485566356,0.47140452079103173,0.45175395145262565],"dataClass":"synthetic","energyEV":[1.5,2,2.5,3,3.5],"fitEndIndex":4,"fitStartIndex":0,"transition":"direct-allowed"}' \
  | 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 $0.109001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.109001" });
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 $0.109001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fmicro%2Fmaterials-optical-bandgap-fit&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/micro/materials-optical-bandgap-fit", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "absorptionPerM": [
      0.47140452079103173,
      0.5,
      0.4898979485566356,
      0.47140452079103173,
      0.45175395145262565
    ],
    "dataClass": "synthetic",
    "energyEV": [
      1.5,
      2,
      2.5,
      3,
      3.5
    ],
    "fitEndIndex": 4,
    "fitStartIndex": 0,
    "transition": "direct-allowed"
  }),
});
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 $0.109001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.109001"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://www.mahastrategies.com/api/v1/micro/materials-optical-bandgap-fit",
        json={
            "absorptionPerM": [
                0.47140452079103173,
                0.5,
                0.4898979485566356,
                0.47140452079103173,
                0.45175395145262565,
            ],
            "dataClass": "synthetic",
            "energyEV": [
                1.5,
                2,
                2.5,
                3,
                3.5,
            ],
            "fitEndIndex": 4,
            "fitStartIndex": 0,
            "transition": "direct-allowed",
        },
    )
    print(res.status_code, res.text)