Materials Property Snapshot

{
  "data": {
    "chargedAmount": "10067",
    "inputHash": "sha256:e1f80669f72546ec2a766071255c46c71fd6b9db9d71bc50561a983c9…",
    "limitations": [
      "Public or synthetic nonpersonal metadata only; these are caller …"
    ],
    "productId": "materials-property-source-snapshot",
    "result": {
      "authoritativeSourcesConsulted": false,
      "domainValidationEstablished": false,
      "findings": [],
      "method": "materials-property-source-snapshot/1",
      "metrics": [
        {
          "key": "age-seconds",
          "recordId": "src",
          "value": "86400"
        }
      ]
    },
    "resultHash": "sha256:b1257a521c6d77ff8af7c6e3a266c3bdc87d3e9e01c790aeb9908823b…",
    "version": "maha-typed-metadata-audit/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/intel/materials/property-snapshot' \
  -H 'content-type: application/json' \
  --data-raw '{"assessedAt":"2026-01-02T00:00:00.000Z","dataClass":"synthetic","expectedDigest":"sha256:d211050b2b9482144e4c21d59eda951680855d196bbb2a8baaea0bcaebbbebde","maxAgeSeconds":90000,"nonpersonalMetadata":true,"snapshot":{"measurement":{"id":"m1","method":"tensile","property":"yield-stress","temperatureMilliK":300000,"unit":"MPa","valueMilli":2},"observedAt":"2026-01-01T00:00:00.000Z","sourceRevision":"sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"},"sourceId":"src"}'

# 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/intel/materials/property-snapshot' \
  -H 'content-type: application/json' \
  --data-raw '{"assessedAt":"2026-01-02T00:00:00.000Z","dataClass":"synthetic","expectedDigest":"sha256:d211050b2b9482144e4c21d59eda951680855d196bbb2a8baaea0bcaebbbebde","maxAgeSeconds":90000,"nonpersonalMetadata":true,"snapshot":{"measurement":{"id":"m1","method":"tensile","property":"yield-stress","temperatureMilliK":300000,"unit":"MPa","valueMilli":2},"observedAt":"2026-01-01T00:00:00.000Z","sourceRevision":"sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"},"sourceId":"src"}' \
  | 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 $0.010067 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.010067" });
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 $0.010067 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fintel%2Fmaterials%2Fproperty-snapshot&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/intel/materials/property-snapshot", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "assessedAt": "2026-01-02T00:00:00.000Z",
    "dataClass": "synthetic",
    "expectedDigest": "sha256:d211050b2b9482144e4c21d59eda951680855d196bbb2a8baaea0bcaebbbebde",
    "maxAgeSeconds": 90000,
    "nonpersonalMetadata": true,
    "snapshot": {
      "measurement": {
        "id": "m1",
        "method": "tensile",
        "property": "yield-stress",
        "temperatureMilliK": 300000,
        "unit": "MPa",
        "valueMilli": 2
      },
      "observedAt": "2026-01-01T00:00:00.000Z",
      "sourceRevision": "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
    },
    "sourceId": "src"
  }),
});
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 $0.010067 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.010067"})
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/intel/materials/property-snapshot",
        json={
            "assessedAt": "2026-01-02T00:00:00.000Z",
            "dataClass": "synthetic",
            "expectedDigest": "sha256:d211050b2b9482144e4c21d59eda951680855d196bbb2a8baaea0bcaebbbebde",
            "maxAgeSeconds": 90000,
            "nonpersonalMetadata": True,
            "snapshot": {
                "measurement": {
                    "id": "m1",
                    "method": "tensile",
                    "property": "yield-stress",
                    "temperatureMilliK": 300000,
                    "unit": "MPa",
                    "valueMilli": 2,
                },
                "observedAt": "2026-01-01T00:00:00.000Z",
                "sourceRevision": "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
            },
            "sourceId": "src",
        },
    )
    print(res.status_code, res.text)