ToolVet
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Qr

by Tanod utilpeek in Developer tools

x402 APIPassing, checked 4 h ago

utilpeek (Tanod) QR code: an SVG or PNG QR code image for up to 2,000 characters of text or a URL.

POST https://tanod.dev/v1/qr

Last 30 days

All checks passedSome failedAll failedNot checked
Uptime
100%
Response time
273 ms typical, 388 ms slowest 5%
Last check
4 h ago
Next check
any minute now

How to call it

POST https://tanod.dev/v1/qr

Each call costs $0.001 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://tanod.dev/v1/qr
content-type: application/json

{
  "border": 2,
  "data": "https://tanod.dev",
  "error": "M",
  "format": "png",
  "scale": 2
}

Parameters

ParameterTypeRequiredDescription
borderintegerNoQuiet-zone width in modules (0-10, default 4). Default: 4.
datastringYesText or URL to encode (1-2000 characters, at most 2953 UTF-8 bytes).
errorstringNoError correction level L | M | Q | H (default M). One of: L, M, Q, H. Default: "M".
formatstringNosvg (default, returned as text) or png (base64). One of: svg, png. Default: "svg".
scaleintegerNoPixels per module (1-20, default 8). Default: 8.

Example response

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

{
  "border": 2,
  "bytes": 215,
  "content_type": "image/png",
  "data_base64": "iVBORw0KGgoAAAANSUhEUgAAADoAAAA6AQAAAADJwHeFAAAAnklEQVR42oWRMQpEIQxEw6b94FUCaYVcXbAVvIowrZD9sCw4v9hNJY+ZyaiSn2ny47DEfIq2l3wHaT0CJ9G6pzkRz/4gMZRJ1sk5S9yddmVi+V3jcF3X8toPsoGCOc+cFqggl45dd5BLylDaNTCagjTm5oVyYOinJruW9ui8DHC6lymc39CBR8O4dUx8XaZMZHCfrLE9eBdq4z5/f/kNcMGsmAlL1A4AAAAASUVORK5CYII=",
  "error": "M",
  "format": "png",
  "height_px": 58,
  "modules": 25,
  "scale": 2,
  "version": 2,
  "width_px": 58
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.001.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://tanod.dev/v1/qr' \
  -H 'content-type: application/json' \
  --data-raw '{"border":2,"data":"https://tanod.dev","error":"M","format":"png","scale":2}'

# 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/qr' \
  -H 'content-type: application/json' \
  --data-raw '{"border":2,"data":"https://tanod.dev","error":"M","format":"png","scale":2}' \
  | 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 $0.001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.001" });
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 $0.001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ftanod.dev%2Fv1%2Fqr&method=POST
const res = await pay("https://tanod.dev/v1/qr", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "border": 2,
    "data": "https://tanod.dev",
    "error": "M",
    "format": "png",
    "scale": 2
  }),
});
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 $0.001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.001"})
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/qr",
        json={
            "border": 2,
            "data": "https://tanod.dev",
            "error": "M",
            "format": "png",
            "scale": 2,
        },
    )
    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

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