77trust / 100

Moderate

by Verdict 402 in Security & trust

x402 APIPassing, checked 27 min ago

Semantic content moderation, not a word list: profanity (even disguised, any language), harassment, hate, sexual content, threats, self-harm, scams. Per-category scores, allow/review/block, configurable ignore list.

POST
https://verdict.kechlab.com/v1/moderate
Price
$0.0091
per call in USDC
Uptime
100%
last 30 days
Response time
549 ms
736 ms slowest 5%
Last check
Passed
27 min ago, next in 4 min

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://verdict.kechlab.com/v1/moderate

Each call costs $0.0091 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://verdict.kechlab.com/v1/moderate
content-type: application/json

{
  "ignore": [
    "profanity"
  ],
  "text": "The delivery was late and the support team never answered. Very disappointing."
}

Parameters

ParameterTypeRequiredDescription
ignorearray of stringNo(optional) categories to tolerate: profanity, harassment, hate, sexual, violence, self_harm, spam_scam
textstringYesthe text to moderate

Example response

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

Example response, 33 lines
{
  "mode": "moderate",
  "paid_sats": 20,
  "payment_hash": "x402:<sha256 hex>",
  "receipt": {
    "payload": {
      "at": "<ISO 8601 time>",
      "kid": "<signing key id>",
      "mode": "moderate",
      "payment_hash": "x402:<sha256 hex>",
      "v": 1,
      "verdict_sha256": "<sha256 hex of the verdict>"
    },
    "signature": "<base64url Ed25519 signature>"
  },
  "verdict": {
    "decision": "allow",
    "flags": [],
    "ignored": [
      "profanity"
    ],
    "rule": "block if hate, violence, self-harm or sexual >= 0.8 ; review if any category >= 0.5 ; otherwise allow ; ignored categories do not count",
    "scores": {
      "harassment": 0.04,
      "hate": 0.01,
      "profanity": 0.01,
      "self_harm": 0.01,
      "sexual": 0.01,
      "spam_scam": 0.02,
      "violence": 0.01
    }
  }
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.0091.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://verdict.kechlab.com/v1/moderate' \
  -H 'content-type: application/json' \
  --data-raw '{"ignore":["profanity"],"text":"The delivery was late and the support team never answered. Very disappointing."}'

# 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://verdict.kechlab.com/v1/moderate' \
  -H 'content-type: application/json' \
  --data-raw '{"ignore":["profanity"],"text":"The delivery was late and the support team never answered. Very disappointing."}' \
  | 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 $0.0091 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.0091" });
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 $0.0091 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fverdict.kechlab.com%2Fv1%2Fmoderate&method=POST
const res = await pay("https://verdict.kechlab.com/v1/moderate", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "ignore": [
      "profanity"
    ],
    "text": "The delivery was late and the support team never answered. Very disappointing."
  }),
});
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 $0.0091 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.0091"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://verdict.kechlab.com/v1/moderate",
        json={
            "ignore": [
                "profanity",
            ],
            "text": "The delivery was late and the support team never answered. Very disappointing.",
        },
    )
    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
27 min agoPassed402544 ms$0.0091
6 h agoPassed402862 ms$0.0091
11 h agoPassed402631 ms$0.0091
16 h agoPassed402615 ms$0.0092
22 h agoPassed402515 ms$0.0092
Show 10 older checks
27 h agoPassed402601 ms$0.0092
32 h agoPassed402640 ms$0.0092
36 h agoPassed402492 ms$0.0092
41 h agoPassed402523 ms$0.0092
46 h agoPassed402504 ms$0.0092
2 days agoPassed402673 ms$0.0092
2 days agoPassed402736 ms$0.0093
2 days agoPassed402493 ms$0.0093
3 days agoPassed402623 ms$0.0095
3 days agoPassed402549 ms$0.0095

History

24 Oct 2026Price changed from $0.0092 to $0.0091
22 Oct 2026Price changed from $0.0093 to $0.0092
22 Oct 2026Price changed from $0.0095 to $0.0093
21 Oct 2026Price changed from $0.0094 to $0.0095
21 Oct 2026Price changed from $0.0093 to $0.0094
20 Oct 2026Price changed from $0.0092 to $0.0093