Publications Updates

{
  "data": {
    "inputHash": "sha256:f1d3e13798b3d75382cbf77a09f13e16eb26ebd1a460029a3c205b8e0…",
    "limitations": [
      "Schema and integrity checks do not certify scientific truth, com…"
    ],
    "productId": "research-publication-update-snapshot",
    "receiptDigest": "sha256:eb9fb05f9205507a904baaa1e285eda2bd52330da3d9cab1e31aae878…",
    "result": {
      "absenceProvesUnretracted": false,
      "queriedDoi": "10.1038/nphys1170",
      "recordsUpdatingThisDoi": [],
      "sources": [
        {
          "provider": "Crossref",
          "providerUpdatedAt": null,
          "rawBytesSha256": "sha256:2b6d87141ae5fa0f6ebdf2b952a692211541ba7a764fb6a7efbb49252…",
          "retrievedAt": "2026-10-15T00:00:00.000Z",
          "rightsBasis": "Crossref public bibliographic metadata only; no abstracts, autho…",
          "sourceCompletenessEstablished": false,
          "url": "https://api.crossref.org/works/10.1038%2Fnphys1170"
        }
      ],
      "thisRecordUpdates": [],
      "truncated": false,
      "updatingRecordCount": 0
    },
    "resultHash": "sha256:b87f2f180e16c12bed5ff2aedb28130bbbfcbf5158f42cb7b6ea0ef40…",
    "version": "maha-workflow/1.0.0"
  },
  "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/publications/updates' \
  -H 'content-type: application/json' \
  --data-raw '{"dataClass":"public","doi":"10.1038/nphys1170"}'

# 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/publications/updates' \
  -H 'content-type: application/json' \
  --data-raw '{"dataClass":"public","doi":"10.1038/nphys1170"}' \
  | 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 $0.010062 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.010062" });
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 $0.010062 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fintel%2Fpublications%2Fupdates&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/intel/publications/updates", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "dataClass": "public",
    "doi": "10.1038/nphys1170"
  }),
});
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 $0.010062 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.010062"})
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/publications/updates",
        json={
            "dataClass": "public",
            "doi": "10.1038/nphys1170",
        },
    )
    print(res.status_code, res.text)