Materials Particle Size Summary

{
  "data": {
    "chargedAmount": "15003",
    "inputHash": "sha256:e28feaad90ae0a5bae06158d9bf97d144c949a1b02664047207c0e481…",
    "limitations": [
      "Public or synthetic inputs only. Caller labels are declarations,…"
    ],
    "productId": "materials-particle-size-summary",
    "result": {
      "findings": {
        "D10Micrometers": 1,
        "D50Micrometers": 2,
        "D90Micrometers": 4,
        "method": "inverse weighted empirical CDF, no interpolation; supplied weigh…",
        "weightedMeanMicrometers": 2.25,
        "weighting": "number"
      },
      "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"
    },
    "resultHash": "sha256:122802aea34a7078272fb65a7184fe5986816c55edfcce592427cd497…",
    "sourceContractAmount": "15001",
    "version": "maha-legacy-adapter/1"
  },
  "proof": {
    "settlement_id": "0x00000000000000000000000000000000000000000000000000000000000000…"
  },
  "success": true
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://www.mahastrategies.com/api/v1/compute/materials/particle-size-summary' \
  -H 'content-type: application/json' \
  --data-raw '{"dataClass":"synthetic","diametersMicrometers":[1,2,4],"weighting":"number","weights":[1,2,1]}'

# 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/compute/materials/particle-size-summary' \
  -H 'content-type: application/json' \
  --data-raw '{"dataClass":"synthetic","diametersMicrometers":[1,2,4],"weighting":"number","weights":[1,2,1]}' \
  | 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 $0.015003 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.015003" });
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 $0.015003 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fcompute%2Fmaterials%2Fparticle-size-summary&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/compute/materials/particle-size-summary", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "dataClass": "synthetic",
    "diametersMicrometers": [
      1,
      2,
      4
    ],
    "weighting": "number",
    "weights": [
      1,
      2,
      1
    ]
  }),
});
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 $0.015003 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.015003"})
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/compute/materials/particle-size-summary",
        json={
            "dataClass": "synthetic",
            "diametersMicrometers": [
                1,
                2,
                4,
            ],
            "weighting": "number",
            "weights": [
                1,
                2,
                1,
            ],
        },
    )
    print(res.status_code, res.text)