Policy Excerpts Missingness Cooccurrence

{
  "data": {
    "chargedAmount": "20293",
    "inputHash": "sha256:72355bf0450a2f43998ba3d2e4238fa2d8df35df5e07d7bff3aeed5a0…",
    "limitations": [
      "Public or synthetic nonpersonal metadata only; these are caller …"
    ],
    "productId": "policy-excerpts-missingness-cooccurrence",
    "result": {
      "authoritativeSourcesConsulted": false,
      "domainValidationEstablished": false,
      "findings": [],
      "method": "policy-excerpts-missingness-cooccurrence/1",
      "metrics": [
        {
          "key": "jurisdiction-scope-nulls",
          "recordId": "policy",
          "value": "0"
        }
      ]
    },
    "resultHash": "sha256:d44ef6a44a37a320448bc9e2b6a5f72bc6e527b0bfdcf79accac5adc7…",
    "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/context/policy-excerpts/missingness-cooccurrence' \
  -H 'content-type: application/json' \
  --data-raw '{"dataClass":"synthetic","excerpts":[{"effectiveAt":"2026-01-01T00:00:00.000Z","id":"x1","jurisdiction":"j1","scope":"work"}],"nonpersonalMetadata":true}'

# 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/context/policy-excerpts/missingness-cooccurrence' \
  -H 'content-type: application/json' \
  --data-raw '{"dataClass":"synthetic","excerpts":[{"effectiveAt":"2026-01-01T00:00:00.000Z","id":"x1","jurisdiction":"j1","scope":"work"}],"nonpersonalMetadata":true}' \
  | 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 $0.020293 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.020293" });
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 $0.020293 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fcontext%2Fpolicy-excerpts%2Fmissingness-cooccurrence&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/context/policy-excerpts/missingness-cooccurrence", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "dataClass": "synthetic",
    "excerpts": [
      {
        "effectiveAt": "2026-01-01T00:00:00.000Z",
        "id": "x1",
        "jurisdiction": "j1",
        "scope": "work"
      }
    ],
    "nonpersonalMetadata": true
  }),
});
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 $0.020293 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.020293"})
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/context/policy-excerpts/missingness-cooccurrence",
        json={
            "dataClass": "synthetic",
            "excerpts": [
                {
                    "effectiveAt": "2026-01-01T00:00:00.000Z",
                    "id": "x1",
                    "jurisdiction": "j1",
                    "scope": "work",
                },
            ],
            "nonpersonalMetadata": True,
        },
    )
    print(res.status_code, res.text)