ToolVet
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Evidence Version Selection

by Evidence Version Selection Check in Documents & files

x402 APIPassing, checked 3 h ago

Check selected versions of up to 40 declared documents against up to 100 effective-date records at one assessment time. Flags inactive, unknown and missing selections; overlapping active versions remain ambiguous. Public/synthetic metadata only. No inferred amendment graph, legal effect or source validation. New modular adapter: retained result recovery for 24 hours, minimal receipt metadata for 90 days. Existing live route unchanged.

POST
https://www.mahastrategies.com/api/v1/context/evidence/version-selection
Price
$0.063
per call in USDC
Uptime
100%
last 30 days
Response time
223 ms
478 ms slowest 5%
Last check
Passed
3 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://www.mahastrategies.com/api/v1/context/evidence/version-selection

Each call costs $0.063001 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://www.mahastrategies.com/api/v1/context/evidence/version-selection
content-type: application/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": null,
      "versionHash": "sha256:1111111111111111111111111111111111111111111111111111111111111111",
      "versionId": "v1"
    }
  ]
}

Parameters

ParameterTypeRequiredDescription
assessedAtstringYes
dataClassstringYes One of: public, synthetic.
documentIdsarrayYes
metadataCompletebooleanYes
selectionsarrayYes
versionsarrayYes

Example response

The provider's example. We can't check it without paying.

Example response, 35 lines
{
  "data": {
    "chargedAmount": "63001",
    "inputHash": "sha256:4c704f1cedf2a29164c4dec0a945f469bcbd2a8d978e73a318a9e7bbc…",
    "limitations": [
      "Public or synthetic inputs only. Caller labels are declarations,…"
    ],
    "productId": "evidence-version-selection-check",
    "result": {
      "checks": [
        {
          "activeVersionIds": [
            "v1"
          ],
          "documentId": "document-1",
          "issues": [],
          "selectedVersionIds": [
            "v1"
          ],
          "state": "consistent-declarations"
        }
      ],
      "legalEffectVerified": false,
      "sourcesVerified": false,
      "state": "consistent-declarations"
    },
    "resultHash": "sha256:38a67aa4353967cafae8ebb6b47ac8c5026cf963cd879c8788388439f…",
    "sourceContractAmount": "63000",
    "version": "maha-legacy-adapter/1"
  },
  "proof": {
    "settlement_id": "0x00000000000000000000000000000000000000000000000000000000000000…"
  },
  "success": true
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.063001.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://www.mahastrategies.com/api/v1/context/evidence/version-selection' \
  -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/context/evidence/version-selection' \
  -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
JavaScript: pay and call
// 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 $0.063001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.063001" });
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 $0.063001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fcontext%2Fevidence%2Fversion-selection&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/context/evidence/version-selection", {
  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());
Python: pay and call
# 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 $0.063001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.063001"})
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/evidence/version-selection",
        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)

Security scan

No findings

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Recent checks

WhenResultHTTPTimePrice
3 h agoPassed402343 ms$0.063
8 h agoPassed402478 ms$0.063
13 h agoPassed402275 ms$0.063
17 h agoPassed402223 ms$0.063
22 h agoPassed402262 ms$0.063
Show 3 older checks
27 h agoPassed402213 ms$0.063
31 h agoPassed402202 ms$0.063
35 h agoPassed402200 ms$0.063