80trust / 100

Hallucination Rate

by aialign.halowerk.com in Onchain & crypto

x402 APIPassing, checked 2 h ago

Tokenizes each claim and its supplied evidence, removes a small declared English stop-word list, and reports the fraction of unique claim tokens present in evidence. Coverage below a supplied threshold is flagged. This is lexical grounding screening only: overlap does not prove truth, low overlap does not prove hallucination, and the service does not retrieve or validate evidence.

POST
https://aialign.halowerk.com/v1/hallucination-rate
Price
$0.004
per call in USDC
Uptime
100%
last 30 days
Response time
107 ms
175 ms slowest 5%
Last check
Passed
2 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://aialign.halowerk.com/v1/hallucination-rate

Each call costs $0.004 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://aialign.halowerk.com/v1/hallucination-rate
content-type: application/json

{
  "claims": [
    {
      "claim_id": "claim-1",
      "claim_text": "The turbine generated 42 megawatt hours in August.",
      "evidence_texts": [
        "The August meter record reports turbine output of 42 megawatt hours."
      ]
    },
    {
      "claim_id": "claim-2",
      "claim_text": "The turbine had zero maintenance downtime.",
      "evidence_texts": [
        "The August meter record reports turbine output of 42 megawatt hours."
      ]
    }
  ],
  "minimum_coverage_fraction": 0.6
}

Parameters

ParameterTypeRequiredDescription
claimsarray of objectYes
minimum_coverage_fractionnumberYes

Example response

The listing has no example response.

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.004.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://aialign.halowerk.com/v1/hallucination-rate' \
  -H 'content-type: application/json' \
  --data-raw '{"claims":[{"claim_id":"claim-1","claim_text":"The turbine generated 42 megawatt hours in August.","evidence_texts":["The August meter record reports turbine output of 42 megawatt hours."]},{"claim_id":"claim-2","claim_text":"The turbine had zero maintenance downtime.","evidence_texts":["The August meter record reports turbine output of 42 megawatt hours."]}],"minimum_coverage_fraction":0.6}'

# 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://aialign.halowerk.com/v1/hallucination-rate' \
  -H 'content-type: application/json' \
  --data-raw '{"claims":[{"claim_id":"claim-1","claim_text":"The turbine generated 42 megawatt hours in August.","evidence_texts":["The August meter record reports turbine output of 42 megawatt hours."]},{"claim_id":"claim-2","claim_text":"The turbine had zero maintenance downtime.","evidence_texts":["The August meter record reports turbine output of 42 megawatt hours."]}],"minimum_coverage_fraction":0.6}' \
  | 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 $0.004 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.004" });
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 $0.004 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Faialign.halowerk.com%2Fv1%2Fhallucination-rate&method=POST
const res = await pay("https://aialign.halowerk.com/v1/hallucination-rate", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "claims": [
      {
        "claim_id": "claim-1",
        "claim_text": "The turbine generated 42 megawatt hours in August.",
        "evidence_texts": [
          "The August meter record reports turbine output of 42 megawatt hours."
        ]
      },
      {
        "claim_id": "claim-2",
        "claim_text": "The turbine had zero maintenance downtime.",
        "evidence_texts": [
          "The August meter record reports turbine output of 42 megawatt hours."
        ]
      }
    ],
    "minimum_coverage_fraction": 0.6
  }),
});
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 $0.004 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.004"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://aialign.halowerk.com/v1/hallucination-rate",
        json={
            "claims": [
                {
                    "claim_id": "claim-1",
                    "claim_text": "The turbine generated 42 megawatt hours in August.",
                    "evidence_texts": [
                        "The August meter record reports turbine output of 42 megawatt hours.",
                    ],
                },
                {
                    "claim_id": "claim-2",
                    "claim_text": "The turbine had zero maintenance downtime.",
                    "evidence_texts": [
                        "The August meter record reports turbine output of 42 megawatt hours.",
                    ],
                },
            ],
            "minimum_coverage_fraction": 0.6,
        },
    )
    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

WhenResultHTTPTimePrice
2 h agoPassed402102 ms$0.004
5 h agoPassed402155 ms$0.004
9 h agoPassed402107 ms$0.004
12 h agoPassed402101 ms$0.004
15 h agoPassed40299 ms$0.004
Show 10 older checks
18 h agoPassed402220 ms$0.004
21 h agoPassed40296 ms$0.004
24 h agoPassed402106 ms$0.004
28 h agoPassed402120 ms$0.004
33 h agoPassed40298 ms$0.004
38 h agoPassed402106 ms$0.004
44 h agoPassed402104 ms$0.004
2 days agoPassed402132 ms$0.004
2 days agoPassed40298 ms$0.004
2 days agoPassed402110 ms$0.004