Books Live Citation Recheck

{
  "data": {
    "chargedAmount": "10061",
    "inputHash": "sha256:207f0aed5c3454ea6df00adc7e1063c4201b5e78b640b7b2262ba1690…",
    "limitations": [
      "Public or synthetic nonpersonal input only; caller labels are no…"
    ],
    "productId": "live-citation-recheck",
    "result": {
      "checks": [
        {
          "changedFromDeclaredHash": null,
          "locators": [
            {
              "endCodePoint": 14,
              "quote": "Context Review",
              "quoteHash": "sha256:70dec104ea7ea5bb2521af7f68d40a59f0710eb5b1bd7227cff34d2ff…",
              "sourceId": "context-review",
              "startCodePoint": 0
            }
          ],
          "locatorsTruncated": false,
          "occurrenceCount": 2,
          "sourceId": "context-review",
          "state": "present_multiple"
        }
      ],
      "factualSupportVerified": false,
      "sources": [
        {
          "extractedTextHash": "sha256:4b79d36cc1492e3a68cf345b428dbcadcc0569608e3d1e408870e4b3d…",
          "extraction": "maha-public-text/1.0",
          "rawBytesHash": "sha256:ac2a29423a50386be46cbe7389fe7ffe3eadbe25a867741d53b2e5c83…",
          "retrievedAt": "2026-10-12T12:00:00.000Z",
          "rightsBasis": "Maha-owned public text; short excerpt reuse authorized by the pu…",
          "sourceId": "context-review",
          "url": "https://www.mahastrategies.com/tools/context-review"
        }
      ]
    },
    "resultHash": "sha256:8210524cfa66abd9d5bea898b3220782f10f9d82f4d78018a3c219e32…",
    "version": "maha-reviewed-legacy-port/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/library/books/live-citation-recheck' \
  -H 'content-type: application/json' \
  --data-raw '{"dataClass":"synthetic","nonpersonalMetadata":true,"request":{"citations":[{"previousTextHash":null,"quote":"Context Review","sourceId":"context-review","url":"https://www.mahastrategies.com/tools/context-review"}],"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/library/books/live-citation-recheck' \
  -H 'content-type: application/json' \
  --data-raw '{"dataClass":"synthetic","nonpersonalMetadata":true,"request":{"citations":[{"previousTextHash":null,"quote":"Context Review","sourceId":"context-review","url":"https://www.mahastrategies.com/tools/context-review"}],"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 $0.010061 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.010061" });
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 $0.010061 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Flibrary%2Fbooks%2Flive-citation-recheck&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/library/books/live-citation-recheck", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "dataClass": "synthetic",
    "nonpersonalMetadata": true,
    "request": {
      "citations": [
        {
          "previousTextHash": null,
          "quote": "Context Review",
          "sourceId": "context-review",
          "url": "https://www.mahastrategies.com/tools/context-review"
        }
      ],
      "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 $0.010061 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.010061"})
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/library/books/live-citation-recheck",
        json={
            "dataClass": "synthetic",
            "nonpersonalMetadata": True,
            "request": {
                "citations": [
                    {
                        "previousTextHash": None,
                        "quote": "Context Review",
                        "sourceId": "context-review",
                        "url": "https://www.mahastrategies.com/tools/context-review",
                    },
                ],
                "dataClass": "synthetic",
            },
        },
    )
    print(res.status_code, res.text)