ToolVet
33trust / 100

Shift Ciphers

by Classic Ciphers and Encodings in Other

x402 APIFailing, checked 22 h ago

Caesar, ROT13, ROT47, ROT5 and Atbash encode or decode for puzzles and learning. Not secure; keeps case and punctuation.

GET
https://text-ciphers.x402tookit.com/shift-ciphers
Price
$0.02
per call in USDC
Uptime
53.9%
last 30 days
Response time
529 ms
641 ms slowest 5%
Last check
Failed
22 h ago, next in 4 h

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Latest check failed 22 h ago: Expected HTTP 402, got 530

Status and outage history · Atom feed · Watch with other listings

How to call it

GET https://text-ciphers.x402tookit.com/shift-ciphers

Each call costs $0.02 in USDC on Polygon, 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.

GET https://text-ciphers.x402tookit.com/shift-ciphers?cipher=caesar&shift=3&text=Attack+at+dawn

Parameters

ParameterTypeRequiredDescription
cipherstringNoOne of caesar, rot13, rot47, atbash, rot5 (default caesar)
modestringNoencode (default) or decode
shiftintegerNoCaesar shift -25 to 25 (default 3); ignored by the others
textstringYesText to transform (up to 2000 characters)

Example response

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

{
  "asOf": "2026-10-11T14:31:59.167Z",
  "cipher": "caesar",
  "degraded": false,
  "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
  "input": "Attack at dawn",
  "mode": "encode",
  "notChecked": [
    "security: every cipher here can be broken by hand in seconds; never use them to protect anything",
    "characters outside A-Z, a-z (and the printable ASCII range for ROT47) pass through unchanged"
  ],
  "output": "Dwwdfn dw gdzq",
  "reasons": [
    "Educational cipher, trivially breakable: do not use it to protect real secrets.",
    "Decode shifts by the opposite amount."
  ],
  "secure": false,
  "shift": 3,
  "source": "computed locally (classical ciphers)",
  "summary": "caesar (shift 3) encode: Dwwdfn dw gdzq",
  "verdict": "ENCODED"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.02.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://text-ciphers.x402tookit.com/shift-ciphers?cipher=caesar&shift=3&text=Attack+at+dawn'

# 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 - 'https://text-ciphers.x402tookit.com/shift-ciphers?cipher=caesar&shift=3&text=Attack+at+dawn' \
  | 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 $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
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 $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ftext-ciphers.x402tookit.com%2Fshift-ciphers
const res = await pay("https://text-ciphers.x402tookit.com/shift-ciphers?cipher=caesar&shift=3&text=Attack+at+dawn");
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 $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://text-ciphers.x402tookit.com/shift-ciphers?cipher=caesar&shift=3&text=Attack+at+dawn")
    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
22 h agoExpected HTTP 402, got 530530154 ms-
2 days agoExpected HTTP 402, got 53053080 ms-
3 days agoExpected HTTP 402, got 53053088 ms-
4 days agoExpected HTTP 402, got 53053094 ms-
5 days agoExpected HTTP 402, got 530530260 ms-
Show 8 older checks
5 days agoExpected HTTP 402, got 530530152 ms-
5 days agoPassed402516 ms$0.02
5 days agoPassed402641 ms$0.02
6 days agoPassed402545 ms$0.02
6 days agoPassed402529 ms$0.02
6 days agoPassed402529 ms$0.02
6 days agoPassed402484 ms$0.02
6 days agoPassed402507 ms$0.02