Micro Public Spending Review

{
  "amountBaseUnits": "180000",
  "boundaries": [
    "Public or synthetic inputs only. Caller labels are declarations,…"
  ],
  "inputDigest": "sha256:768646020f1b382fddb6648e52cde152abccd4405379c8a8ef8a42074…",
  "offerId": "public-spending-review",
  "receiptDigest": "sha256:e5fb0fe49a9a7ed6ccfa16fbae1a8185a46adda61ab35a08b24ce915f…",
  "result": {
    "approvalGranted": false,
    "basis": "synthetic",
    "limitations": [
      "Caller defines comparable groups, payee identities, budgets, sou…"
    ],
    "method": "public-spending-review/1",
    "rows": [
      {
        "id": "program-2026",
        "metrics": [
          {
            "name": "amountCents",
            "value": "110000"
          }
        ],
        "relatedIds": [
          "public-table-row-1",
          "public-table-row-2"
        ],
        "status": "flagged"
      }
    ],
    "totals": [
      {
        "name": "excludedDuplicateRows",
        "value": "0"
      }
    ]
  },
  "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/public-spending-review' \
  -H 'content-type: application/json' \
  --data-raw '{"concentrationThresholdBps":6000,"currency":"USD","dataClass":"synthetic","records":[{"amountCents":"70000","budgetCents":"100000","groupId":"program-2026","id":"award-1","payeeId":"payee-a","sourceRef":"public-table-row-1"},{"amountCents":"40000","budgetCents":"100000","groupId":"program-2026","id":"award-2","payeeId":"payee-b","sourceRef":"public-table-row-2"}],"sourceSetDigest":"sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"}'

# 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/public-spending-review' \
  -H 'content-type: application/json' \
  --data-raw '{"concentrationThresholdBps":6000,"currency":"USD","dataClass":"synthetic","records":[{"amountCents":"70000","budgetCents":"100000","groupId":"program-2026","id":"award-1","payeeId":"payee-a","sourceRef":"public-table-row-1"},{"amountCents":"40000","budgetCents":"100000","groupId":"program-2026","id":"award-2","payeeId":"payee-b","sourceRef":"public-table-row-2"}],"sourceSetDigest":"sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"}' \
  | 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 $0.18 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.18" });
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 $0.18 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fmicro%2Fpublic-spending-review&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/micro/public-spending-review", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "concentrationThresholdBps": 6000,
    "currency": "USD",
    "dataClass": "synthetic",
    "records": [
      {
        "amountCents": "70000",
        "budgetCents": "100000",
        "groupId": "program-2026",
        "id": "award-1",
        "payeeId": "payee-a",
        "sourceRef": "public-table-row-1"
      },
      {
        "amountCents": "40000",
        "budgetCents": "100000",
        "groupId": "program-2026",
        "id": "award-2",
        "payeeId": "payee-b",
        "sourceRef": "public-table-row-2"
      }
    ],
    "sourceSetDigest": "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
  }),
});
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 $0.18 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.18"})
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/public-spending-review",
        json={
            "concentrationThresholdBps": 6000,
            "currency": "USD",
            "dataClass": "synthetic",
            "records": [
                {
                    "amountCents": "70000",
                    "budgetCents": "100000",
                    "groupId": "program-2026",
                    "id": "award-1",
                    "payeeId": "payee-a",
                    "sourceRef": "public-table-row-1",
                },
                {
                    "amountCents": "40000",
                    "budgetCents": "100000",
                    "groupId": "program-2026",
                    "id": "award-2",
                    "payeeId": "payee-b",
                    "sourceRef": "public-table-row-2",
                },
            ],
            "sourceSetDigest": "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
        },
    )
    print(res.status_code, res.text)