Discover

{
  "category": "all",
  "chain": "base",
  "ranked_by": "x402 settlement volume (USDC, Base), last 30 UTC days",
  "recommendations": [
    {
      "avg_price_usd": 12.616852,
      "catalog_calls_30d": 357,
      "domain": "api.bitrefill.com",
      "seller": "0x480cd46e6fade651a0437deadda53d5c8e7d846a",
      "service": "bitrefill.com",
      "settlements_30d": 714,
      "unique_buyers_30d": 113,
      "volume_usd_30d": 9008.432144
    },
    {
      "avg_price_usd": 0.028323,
      "catalog_calls_30d": 207657,
      "domain": "blockrun.ai",
      "seller": "0xe9030014f5dae217d0a152f02a043567b16c1abf",
      "service": "blockrun.ai",
      "settlements_30d": 213448,
      "unique_buyers_30d": 349,
      "volume_usd_30d": 6045.412456
    }
  ],
  "sellers_in_category": 1356,
  "window_start": "2026-09-02T00:00:00.000Z"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://agentaudit.waltsoft.net/v1/discover?category=all'

# 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://agentaudit.waltsoft.net/v1/discover?category=all' \
  | 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 $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
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 $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fagentaudit.waltsoft.net%2Fv1%2Fdiscover
const res = await pay("https://agentaudit.waltsoft.net/v1/discover?category=all");
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 $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://agentaudit.waltsoft.net/v1/discover?category=all")
    print(res.status_code, res.text)