Micro Materials Candidate Comparison

{
  "amountBaseUnits": "199000",
  "boundaries": [
    "Public or synthetic inputs only. Caller labels are declarations,…"
  ],
  "inputDigest": "sha256:f09a9f278b2a71a060a5de34bfa204c71eaa997696ac52c706a3238fc…",
  "offerId": "materials-candidate-comparison",
  "receiptDigest": "sha256:c65c83a5b332899e741336f62dccc9cecf4b0118d17ab2d4dd5462973…",
  "result": {
    "findings": {
      "assessments": [
        {
          "id": "a",
          "missingCriteria": [],
          "score": 0.5
        }
      ],
      "evidenceVerified": false,
      "normalization": "min-max observed candidate cohort per criterion; equal range=0.5…"
    },
    "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-candidate-comparison' \
  -H 'content-type: application/json' \
  --data-raw '{"candidates":[{"id":"a","values":[2]},{"id":"b","values":[null]}],"criteria":[{"direction":"higher","id":"conductivity","weight":1}],"dataClass":"synthetic"}'

# 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-candidate-comparison' \
  -H 'content-type: application/json' \
  --data-raw '{"candidates":[{"id":"a","values":[2]},{"id":"b","values":[null]}],"criteria":[{"direction":"higher","id":"conductivity","weight":1}],"dataClass":"synthetic"}' \
  | 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 $0.199 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.199" });
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 $0.199 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fmicro%2Fmaterials-candidate-comparison&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/micro/materials-candidate-comparison", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "candidates": [
      {
        "id": "a",
        "values": [
          2
        ]
      },
      {
        "id": "b",
        "values": [
          null
        ]
      }
    ],
    "criteria": [
      {
        "direction": "higher",
        "id": "conductivity",
        "weight": 1
      }
    ],
    "dataClass": "synthetic"
  }),
});
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 $0.199 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.199"})
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-candidate-comparison",
        json={
            "candidates": [
                {
                    "id": "a",
                    "values": [
                        2,
                    ],
                },
                {
                    "id": "b",
                    "values": [
                        None,
                    ],
                },
            ],
            "criteria": [
                {
                    "direction": "higher",
                    "id": "conductivity",
                    "weight": 1,
                },
            ],
            "dataClass": "synthetic",
        },
    )
    print(res.status_code, res.text)