ToolVet
72trust / 100

B20 Gate

by B20 Pre-Trade Gate in Onchain & crypto

x402 APIPassing, checked 6 h ago

🆕 The single call before trading a Base-native B20: seize (burnBlocked) + freeze (Policy Registry) + rebase + pause + uncapped-mint, collapsed into one GO/HOLD/STOP verdict with an auditable receipt. Pass wallet= to also check if YOUR address is already blocked on that token. The B20 tool to bind first.

GET
https://402.com.tr/api/x402/b20-gate
Price
$0.1
per call in USDC
Uptime
100%
last 30 days
Response time
462 ms
626 ms slowest 5%
Last check
Passed
6 h ago, next in 47 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

GET https://402.com.tr/api/x402/b20-gate

Each call costs $0.1 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.

GET https://402.com.tr/api/x402/b20-gate?address=0xb20000000000000000000042d5ae64abd03d0dca&wallet=0x973a31858f4d2125f48c880542da11a2796f12d6

Parameters

ParameterTypeRequiredDescription
addressstringYesB20 token address
walletstringNoYour wallet (optional — checks if you're blocked)

Example response

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

{
  "address": "0xb20000000000000000000042d5ae64abd03d0dca",
  "decision": "STOP",
  "isB20": true,
  "senderPolicyComposite": false,
  "symbol": "SRA2",
  "variant": "asset",
  "wallet": "0x973a31858f4d2125f48c880542da11a2796f12d6",
  "walletStatus": "clear"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.1.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://402.com.tr/api/x402/b20-gate?address=0xb20000000000000000000042d5ae64abd03d0dca&wallet=0x973a31858f4d2125f48c880542da11a2796f12d6'

# 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://402.com.tr/api/x402/b20-gate?address=0xb20000000000000000000042d5ae64abd03d0dca&wallet=0x973a31858f4d2125f48c880542da11a2796f12d6' \
  | 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 $0.1 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.1" });
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 $0.1 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2F402.com.tr%2Fapi%2Fx402%2Fb20-gate
const res = await pay("https://402.com.tr/api/x402/b20-gate?address=0xb20000000000000000000042d5ae64abd03d0dca&wallet=0x973a31858f4d2125f48c880542da11a2796f12d6");
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 $0.1 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.1"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://402.com.tr/api/x402/b20-gate?address=0xb20000000000000000000042d5ae64abd03d0dca&wallet=0x973a31858f4d2125f48c880542da11a2796f12d6")
    print(res.status_code, res.text)

Security scan

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Recent checks

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6 h agoPassed402500 ms$0.1
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3 days agoPassed402458 ms$0.1