ToolVet
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Verifier Acp Offering Contract Lint

by LUMI Verifier in Onchain & crypto

x402 APIPassing, checked 3 h ago

Check an ACP offering's published contract before you buy. Detects listings that declare no JSON deliverable schema, name required fields they never declare, or specify no input schema at all — the defects that make a purchase unverifiable after the fact. Reads the public listing only; nothing is purchased or executed. Deterministic, no model judgment. A PASS means the listing is machine-checkable — it is not a correctness guarantee and says nothing about output quality.

POST
https://app.tenna.ai/api/x402/verifier/acp_offering_contract_lint
Price
$0.01
per call in USDC
Uptime
97.4%
last 30 days
Response time
924 ms
1.4 s 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://app.tenna.ai/api/x402/verifier/acp_offering_contract_lint

Each call costs $0.01 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://app.tenna.ai/api/x402/verifier/acp_offering_contract_lint
content-type: application/json

{
  "offering": "acp_offering_contract_lint",
  "offeringContract": {}
}

Parameters

ParameterTypeRequiredDescription
offeringstringYesOffering identifier. Must be exactly 'acp_offering_contract_lint'.
offeringContractobjectYesPublished offering object with its requirements and deliverable schemas.

Example response

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

{
  "buyerReadable": true,
  "dataState": "<dataState>",
  "findings": [
    {}
  ],
  "grade": "<grade>",
  "limitations": [
    "<limitations>"
  ],
  "offering": "acp_offering_contract_lint",
  "provenance": {
    "auditedDeliverableHash": null,
    "generatedAt": 1,
    "ledgerLaunchCount": null,
    "ledgerSpanHours": null,
    "resultHash": null,
    "rubricVersion": null,
    "source": "<source>"
  },
  "schemaVersion": "<schemaVersion>",
  "severityCounts": {}
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.01.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://app.tenna.ai/api/x402/verifier/acp_offering_contract_lint' \
  -H 'content-type: application/json' \
  --data-raw '{"offering":"acp_offering_contract_lint","offeringContract":{}}'

# 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://app.tenna.ai/api/x402/verifier/acp_offering_contract_lint' \
  -H 'content-type: application/json' \
  --data-raw '{"offering":"acp_offering_contract_lint","offeringContract":{}}' \
  | 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 $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
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 $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapp.tenna.ai%2Fapi%2Fx402%2Fverifier%2Facp_offering_contract_lint&method=POST
const res = await pay("https://app.tenna.ai/api/x402/verifier/acp_offering_contract_lint", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "offering": "acp_offering_contract_lint",
    "offeringContract": {}
  }),
});
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 $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://app.tenna.ai/api/x402/verifier/acp_offering_contract_lint",
        json={
            "offering": "acp_offering_contract_lint",
            "offeringContract": {},
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

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