78trust / 100

Api Contracts Export Semantic Parity

by Api Contracts - Export semantic in Onchain & crypto

x402 APIPassing, checked 2 h ago

Compare parsed HTTP contract exports preserving owner, revision, schema pair, exact target and scope labels while ignoring order. No arbitrary schema interpretation or runtime parity is inferred. Offline typed nonpersonal metadata only. Result retention: 24 hours; minimal receipt metadata: 90 days.

POST

https://www.mahastrategies.com/api/v1/verify/api-contracts/export-semantic-parity

Price: $0.039; per call in USDC
Uptime: 100%; last 30 days
Response time: 235 ms; 478 ms slowest 5%
Last check: Passed; 2 h ago, next any minute now

Run a free test call How 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/verify/api-contracts/export-semantic-parity

Each call costs $0.039303 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/verify/api-contracts/export-semantic-parity
content-type: application/json

{
  "after": [
    {
      "id": "c1",
      "inputDigest": "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
      "outputDigest": "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
      "ownerRef": "owner1",
      "revision": "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
      "scopeRef": "public-metadata",
      "target": {
        "method": "POST",
        "path": "/api/v1/context/contracts/check"
      }
    }
  ],
  "before": [
    {
      "id": "c1",
      "inputDigest": "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
      "outputDigest": "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
      "ownerRef": "owner1",
      "revision": "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
      "scopeRef": "public-metadata",
      "target": {
        "method": "POST",
        "path": "/api/v1/context/contracts/check"
      }
    }
  ],
  "dataClass": "synthetic",
  "nonpersonalMetadata": true
}

Parameters

Parameter	Type	Required	Description
`after`	array	Yes
`before`	array	Yes
`dataClass`	string	Yes	One of: public, synthetic.
`nonpersonalMetadata`	boolean	Yes

Example response

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

Example response, 29 lines

{
  "data": {
    "chargedAmount": "39303",
    "inputHash": "sha256:2be56dcf2c10c983ee20524b1301a4ec1d767526c9aa0ee32cfea8c0f…",
    "limitations": [
      "Public or synthetic nonpersonal metadata only; these are caller …"
    ],
    "productId": "api-contracts-export-semantic-parity",
    "result": {
      "authoritativeSourcesConsulted": false,
      "domainValidationEstablished": false,
      "findings": [],
      "method": "api-contracts-export-semantic-parity/1",
      "metrics": [
        {
          "key": "api-export-differences",
          "recordId": "api",
          "value": "0"
        }
      ]
    },
    "resultHash": "sha256:4d3116352128ca4c428b657c6f5071b860b806364e1c4df9497c1c5dd…",
    "version": "maha-typed-metadata-audit/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 $0.039303.

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/verify/api-contracts/export-semantic-parity' \
  -H 'content-type: application/json' \
  --data-raw '{"after":[{"id":"c1","inputDigest":"sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","outputDigest":"sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","ownerRef":"owner1","revision":"sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","scopeRef":"public-metadata","target":{"method":"POST","path":"/api/v1/context/contracts/check"}}],"before":[{"id":"c1","inputDigest":"sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","outputDigest":"sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","ownerRef":"owner1","revision":"sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","scopeRef":"public-metadata","target":{"method":"POST","path":"/api/v1/context/contracts/check"}}],"dataClass":"synthetic","nonpersonalMetadata":true}'

# 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/verify/api-contracts/export-semantic-parity' \
  -H 'content-type: application/json' \
  --data-raw '{"after":[{"id":"c1","inputDigest":"sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","outputDigest":"sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","ownerRef":"owner1","revision":"sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","scopeRef":"public-metadata","target":{"method":"POST","path":"/api/v1/context/contracts/check"}}],"before":[{"id":"c1","inputDigest":"sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","outputDigest":"sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","ownerRef":"owner1","revision":"sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","scopeRef":"public-metadata","target":{"method":"POST","path":"/api/v1/context/contracts/check"}}],"dataClass":"synthetic","nonpersonalMetadata":true}' \
  | 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 $0.039303 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.039303" });
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 $0.039303 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fverify%2Fapi-contracts%2Fexport-semantic-parity&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/verify/api-contracts/export-semantic-parity", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "after": [
      {
        "id": "c1",
        "inputDigest": "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
        "outputDigest": "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
        "ownerRef": "owner1",
        "revision": "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
        "scopeRef": "public-metadata",
        "target": {
          "method": "POST",
          "path": "/api/v1/context/contracts/check"
        }
      }
    ],
    "before": [
      {
        "id": "c1",
        "inputDigest": "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
        "outputDigest": "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
        "ownerRef": "owner1",
        "revision": "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
        "scopeRef": "public-metadata",
        "target": {
          "method": "POST",
          "path": "/api/v1/context/contracts/check"
        }
      }
    ],
    "dataClass": "synthetic",
    "nonpersonalMetadata": true
  }),
});
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 $0.039303 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.039303"})
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/verify/api-contracts/export-semantic-parity",
        json={
            "after": [
                {
                    "id": "c1",
                    "inputDigest": "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
                    "outputDigest": "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
                    "ownerRef": "owner1",
                    "revision": "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
                    "scopeRef": "public-metadata",
                    "target": {
                        "method": "POST",
                        "path": "/api/v1/context/contracts/check",
                    },
                },
            ],
            "before": [
                {
                    "id": "c1",
                    "inputDigest": "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
                    "outputDigest": "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
                    "ownerRef": "owner1",
                    "revision": "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
                    "scopeRef": "public-metadata",
                    "target": {
                        "method": "POST",
                        "path": "/api/v1/context/contracts/check",
                    },
                },
            ],
            "dataClass": "synthetic",
            "nonpersonalMetadata": True,
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

When	Result	HTTP	Time	Price
2 h ago	Passed	402	236 ms	$0.039
6 h ago	Passed	402	390 ms	$0.039
11 h ago	Passed	402	266 ms	$0.039
16 h ago	Passed	402	235 ms	$0.039
20 h ago	Passed	402	185 ms	$0.039

Show 3 older checks

25 h ago	Passed	402	233 ms	$0.039
30 h ago	Passed	402	478 ms	$0.039
34 h ago	Passed	402	181 ms	$0.039

Trust score 78/ 100

Availability (30-day uptime)		30 / 30
Valid x402 challenge		15 / 15
Response time		10 / 10
Real paying agents (30 days)		3 / 15
Charges what it lists		10 / 10
Security scan		10 / 10
Verified owner		0 / 10

How the score works

Payment terms

Price: $0.039 per call
Listed at: $0.039
Token: USDC
Networks: Base
Pays to: 0xec84…de28

Real usage

Paying agents: 1 in 30 days
Paid calls: 1 in 30 days
Last paid call: 38 h ago

Source: x402 Bazaar settlement data.

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Trust score

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