Terms Scan

{
  "mode": "terms-scan",
  "paid_sats": 20,
  "payment_hash": "x402:<sha256 hex>",
  "receipt": {
    "payload": {
      "at": "<ISO 8601 time>",
      "kid": "<signing key id>",
      "mode": "terms-scan",
      "payment_hash": "x402:<sha256 hex>",
      "v": 1,
      "verdict_sha256": "<sha256 hex of the verdict>"
    },
    "signature": "<base64url Ed25519 signature>"
  },
  "verdict": {
    "decision": "do_not_accept",
    "flagged": [
      {
        "clause": "auto_renewal",
        "label": "automatic renewal",
        "score": 0.95
      },
      {
        "clause": "data_sharing",
        "label": "data sharing or resale",
        "score": 0.9
      },
      {
        "clause": "dispute_waiver",
        "label": "waiver of court or class action",
        "score": 0.93
      }
    ],
    "rule": "clause flagged if score >= 0.5 ; do_not_accept if 2 clauses >= 0.8 or 4 clauses flagged ; review_clauses if at least one clause flagged ; otherwise accept",
    "scores": {
      "auto_renewal": 0.95,
      "data_sharing": 0.9,
      "dispute_waiver": 0.93,
      "exit_penalty": 0.1,
      "ip_grab": 0.05,
      "liability_cap": 0.1,
      "unilateral_change": 0.2
    }
  }
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://verdict.kechlab.com/v1/terms-scan' \
  -H 'content-type: application/json' \
  --data-raw '{"acting_for":"individual","terms":"The subscription renews automatically each year unless cancelled 60 days before renewal. We may share your data with partners for marketing. Any dispute must be settled by binding arbitration and you waive the right to join a class action."}'

# 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/terms-scan' \
  -H 'content-type: application/json' \
  --data-raw '{"acting_for":"individual","terms":"The subscription renews automatically each year unless cancelled 60 days before renewal. We may share your data with partners for marketing. Any dispute must be settled by binding arbitration and you waive the right to join a class action."}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// 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 $0.0172 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.0172" });
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 $0.0172 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fverdict.kechlab.com%2Fv1%2Fterms-scan&method=POST
const res = await pay("https://verdict.kechlab.com/v1/terms-scan", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "acting_for": "individual",
    "terms": "The subscription renews automatically each year unless cancelled 60 days before renewal. We may share your data with partners for marketing. Any dispute must be settled by binding arbitration and you waive the right to join a class action."
  }),
});
console.log(res.status, await res.text());

# 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 $0.0172 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.0172"})
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/terms-scan",
        json={
            "acting_for": "individual",
            "terms": "The subscription renews automatically each year unless cancelled 60 days before renewal. We may share your data with partners for marketing. Any dispute must be settled by binding arbitration and you waive the right to join a class action.",
        },
    )
    print(res.status_code, res.text)