Text Redact

{
  "by_type": {
    "card": 1,
    "crypto_address": 0,
    "email": 1,
    "iban": 0,
    "ipv4": 1,
    "ipv6": 0,
    "phone": 1,
    "ssn": 0,
    "url_secret": 0
  },
  "count": 4,
  "entities": [
    {
      "end": 21,
      "replacement": "[EMAIL]",
      "start": 5,
      "type": "email"
    },
    {
      "end": 45,
      "replacement": "[PHONE]",
      "start": 30,
      "type": "phone"
    },
    {
      "end": 71,
      "replacement": "[CARD]",
      "start": 52,
      "type": "card"
    },
    {
      "end": 89,
      "replacement": "[IPV4]",
      "start": 78,
      "type": "ipv4"
    }
  ],
  "mask": "tag",
  "not_detected": [
    "person names",
    "street addresses",
    "dates of birth",
    "national ID numbers other than US SSNs",
    "secrets outside URL query strings"
  ],
  "notes": {
    "card": "13-19 digits, Luhn-valid, with a known issuer prefix and length; spaces or dashes allowed",
    "offsets": "start / end are code-point offsets into the input text (end exclusive)"
  },
  "source": {
    "engine": "RE2 (google-re2 1.1.20251105)",
    "iban": "python-stdnum 2.2 IBAN registry (LGPL-2.1-or-later, unmodified)",
    "license": "BSD-3-Clause",
    "phone": "phonenumbers 9.0.40 (Apache-2.0)",
    "url": "https://github.com/google/re2"
  },
  "text": "Mail [EMAIL] or call [PHONE]; card [CARD], from [IPV4]",
  "types": [
    "email",
    "phone",
    "card",
    "iban",
    "ssn",
    "ipv4",
    "ipv6",
    "crypto_address",
    "url_secret"
  ]
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://tanod.dev/v1/text/redact' \
  -H 'content-type: application/json' \
  --data-raw '{"text":"Mail [email protected] or call +1 650-253-0000; card 4111 1111 1111 1111, from 203.0.113.7"}'

# 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://tanod.dev/v1/text/redact' \
  -H 'content-type: application/json' \
  --data-raw '{"text":"Mail [email protected] or call +1 650-253-0000; card 4111 1111 1111 1111, from 203.0.113.7"}' \
  | 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 $0.002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.002" });
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 $0.002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ftanod.dev%2Fv1%2Ftext%2Fredact&method=POST
const res = await pay("https://tanod.dev/v1/text/redact", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "text": "Mail [email protected] or call +1 650-253-0000; card 4111 1111 1111 1111, from 203.0.113.7"
  }),
});
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 $0.002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.002"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://tanod.dev/v1/text/redact",
        json={
            "text": "Mail [email protected] or call +1 650-253-0000; card 4111 1111 1111 1111, from 203.0.113.7",
        },
    )
    print(res.status_code, res.text)