Micro Chemistry Arrhenius Fit

{
  "amountBaseUnits": "69001",
  "boundaries": [
    "Public or synthetic inputs only. Caller labels are declarations,…"
  ],
  "inputDigest": "sha256:25248ed49eef45c5b26f7752a6339d3d520c7fba4d01ce71fa8828449…",
  "offerId": "chemistry-arrhenius-fit",
  "receiptDigest": "sha256:d5e472c18b460e207153ddb2c44339333707fbccb1d465e2ad1ffd9ec…",
  "result": {
    "findings": {
      "activationEnergyJPerMol": 41572.3130908,
      "method": "unweighted OLS ln(rate) vs 1/K; R=8.31446261815324 J/mol/K; rate…",
      "preExponential": 22026.4657948,
      "transformedFit": {
        "degreesOfFreedom": 2,
        "intercept": 10,
        "rSquared": 1,
        "residualStandardError": 1.7763568394e-15,
        "residuals": [
          -1.7763568394e-15
        ],
        "slope": -5000,
        "slopeStandardError": 3.77822914688e-12
      }
    },
    "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/chemistry-arrhenius-fit' \
  -H 'content-type: application/json' \
  --data-raw '{"dataClass":"synthetic","kelvin":[280,300,320,340],"rate":[0.0003869779446438603,0.0012726338013398068,0.0036065631360157305,0.009041932521329801]}'

# 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/chemistry-arrhenius-fit' \
  -H 'content-type: application/json' \
  --data-raw '{"dataClass":"synthetic","kelvin":[280,300,320,340],"rate":[0.0003869779446438603,0.0012726338013398068,0.0036065631360157305,0.009041932521329801]}' \
  | 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 $0.069001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.069001" });
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 $0.069001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fmicro%2Fchemistry-arrhenius-fit&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/micro/chemistry-arrhenius-fit", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "dataClass": "synthetic",
    "kelvin": [
      280,
      300,
      320,
      340
    ],
    "rate": [
      0.0003869779446438603,
      0.0012726338013398068,
      0.0036065631360157305,
      0.009041932521329801
    ]
  }),
});
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 $0.069001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.069001"})
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/chemistry-arrhenius-fit",
        json={
            "dataClass": "synthetic",
            "kelvin": [
                280,
                300,
                320,
                340,
            ],
            "rate": [
                0.0003869779446438603,
                0.0012726338013398068,
                0.0036065631360157305,
                0.009041932521329801,
            ],
        },
    )
    print(res.status_code, res.text)