Micro Evidence Version Selection Check

{
  "amountBaseUnits": "63000",
  "boundaries": [
    "Public or synthetic inputs only. Caller labels are declarations,…"
  ],
  "inputDigest": "sha256:4c704f1cedf2a29164c4dec0a945f469bcbd2a8d978e73a318a9e7bbc…",
  "offerId": "evidence-version-selection-check",
  "receiptDigest": "sha256:830880bccb22a9714367940f41eb39d60105b310de6e969b1462c3b9a…",
  "result": {
    "checks": [
      {
        "activeVersionIds": [
          "v1"
        ],
        "documentId": "document-1",
        "issues": [],
        "selectedVersionIds": [
          "v1"
        ],
        "state": "consistent-declarations"
      }
    ],
    "legalEffectVerified": false,
    "sourcesVerified": false,
    "state": "consistent-declarations"
  },
  "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/evidence-version-selection-check' \
  -H 'content-type: application/json' \
  --data-raw '{"assessedAt":"2026-10-09T00:00:00.000Z","dataClass":"synthetic","documentIds":["document-1"],"metadataComplete":true,"selections":[{"documentId":"document-1","versionHash":"sha256:1111111111111111111111111111111111111111111111111111111111111111","versionId":"v1"}],"versions":[{"documentId":"document-1","effectiveFrom":"2026-01-01T00:00:00.000Z","effectiveTo":null,"versionHash":"sha256:1111111111111111111111111111111111111111111111111111111111111111","versionId":"v1"}]}'

# 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/evidence-version-selection-check' \
  -H 'content-type: application/json' \
  --data-raw '{"assessedAt":"2026-10-09T00:00:00.000Z","dataClass":"synthetic","documentIds":["document-1"],"metadataComplete":true,"selections":[{"documentId":"document-1","versionHash":"sha256:1111111111111111111111111111111111111111111111111111111111111111","versionId":"v1"}],"versions":[{"documentId":"document-1","effectiveFrom":"2026-01-01T00:00:00.000Z","effectiveTo":null,"versionHash":"sha256:1111111111111111111111111111111111111111111111111111111111111111","versionId":"v1"}]}' \
  | 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 $0.063 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.063" });
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 $0.063 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fmicro%2Fevidence-version-selection-check&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/micro/evidence-version-selection-check", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "assessedAt": "2026-10-09T00:00:00.000Z",
    "dataClass": "synthetic",
    "documentIds": [
      "document-1"
    ],
    "metadataComplete": true,
    "selections": [
      {
        "documentId": "document-1",
        "versionHash": "sha256:1111111111111111111111111111111111111111111111111111111111111111",
        "versionId": "v1"
      }
    ],
    "versions": [
      {
        "documentId": "document-1",
        "effectiveFrom": "2026-01-01T00:00:00.000Z",
        "effectiveTo": null,
        "versionHash": "sha256:1111111111111111111111111111111111111111111111111111111111111111",
        "versionId": "v1"
      }
    ]
  }),
});
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 $0.063 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.063"})
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/evidence-version-selection-check",
        json={
            "assessedAt": "2026-10-09T00:00:00.000Z",
            "dataClass": "synthetic",
            "documentIds": [
                "document-1",
            ],
            "metadataComplete": True,
            "selections": [
                {
                    "documentId": "document-1",
                    "versionHash": "sha256:1111111111111111111111111111111111111111111111111111111111111111",
                    "versionId": "v1",
                },
            ],
            "versions": [
                {
                    "documentId": "document-1",
                    "effectiveFrom": "2026-01-01T00:00:00.000Z",
                    "effectiveTo": None,
                    "versionHash": "sha256:1111111111111111111111111111111111111111111111111111111111111111",
                    "versionId": "v1",
                },
            ],
        },
    )
    print(res.status_code, res.text)