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Payments · x402 · early usage

x402 agent spend audit by Liquid Logic X: where an agent wallet's USDC went

x402 agent spend audit by Liquid Logic X: where an agent wallet's USDC went. Input: a wallet address (0x...). Output: JSON spend summary of x402 payments in Base USDC (count, total, per-endpoint breakdown, recent payments with Basescan tx links, holds/denials…

by audit.liquidlogicx.com · discovered, not yet claimed by its owner · updated 2026-10-06

30d calls4
30d payers2
MethodGET
Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

x402 agent spend audit by Liquid Logic X: where an agent wallet's USDC went. Input: a wallet address (0x...). Output: JSON spend summary of x402 payments in Base USDC (count, total, per-endpoint breakdown, recent payments with Basescan tx links, holds/denials). Source: the Liquid Logic X public ledger (its treasurer agent's spend); anyone can verify each payment onchain. $0.05 USDC on Base. Site: https://liquidlogicx.com

Tags: audit · agent-spend · x402 · usdc · base · bazaar · builder-code · eip2612GasSponsoring · erc20ApprovalGasSponsoring

Call contract

Method
GET
Input
query parameters
Output
json
Last paid call
2026-10-06
Input example from Bazaar metadata
{
  "wallet": "0xEA24bafbBAF6d7Ba58bE860EE906f0Fe533d167D"
}
Output example
{
  "asset": "USDC",
  "denied": 0,
  "destinations": [
    {
      "count": 5,
      "endpoint": "https://audit.liquidlogicx.com/api/audit",
      "examples": [
        {
          "amountUsdc": "0.05",
          "basescanUrl": "https://basescan.org/tx/0x9e69f6d6a0e2b7fe3997733398a6f7986adeb3f64066b421fa38c77d6f051c74",
          "timestamp": "2026-09-13T18:06:49.000Z",
          "txHash": "0x9e69f6d6a0e2b7fe3997733398a6f7986adeb3f64066b421fa38c77d6f051c74"
        },
        {
          "amountUsdc": "0.05",
          "basescanUrl": "https://basescan.org/tx/0x465910619fb6ba1fa3106b911098d435d4900e0bf2bce05b35f3c7e077643318",
          "timestamp": "2026-09-14T00:12:29.000Z",
          "txHash": "0x465910619fb6ba1fa3106b911098d435d4900e0bf2bce05b35f3c7e077643318"
        },
        {
          "amountUsdc": "0.05",
          "basescanUrl": "https://basescan.org/tx/0xa2013bf05ced393b8a678debd04711189cbded68fb57063bc80d28fd4cddbe90",
          "timestamp": "2026-09-14T01:07:29.000Z",
          "txHash": "0xa2013bf05ced393b8a678debd04711189cbded68fb57063bc80d28fd4cddbe90"
        },
        {
          "amountUsdc": "0.05",
          "basescanUrl": "https://basescan.org/tx/0x70fdaaf80af96825932de6237fb09548524813372ac14a0a215459405789cf5d",
          "timestamp": "2026-09-14T17:55:01.000Z",
          "txHash": "0x70fdaaf80af96825932de6237fb09548524813372ac14a0a215459405789cf5d"
        },
        {
          "amountUsdc": "0.05",
          "basescanUrl": "https://basescan.org/tx/0x5ae8ef780242dfd2f03a9f52a58fcec71a45e6aae6eb4b3a96107698c92411ea",
          "timestamp": "2026-09-14T17:59:29.000Z",
          "txHash": "0x5ae8ef780242dfd2f03a9f52a58fcec71a45e6aae6eb4b3a96107698c92411ea"
        }
      ],
      "totalUsdc": 0.25
    },
    {
      "count": 4,
      "endpoint": "https://audit.liquidlogicx.com/api/allowance",
      "examples": [
        {
          "amountUsdc": "0.001",
          "basescanUrl": "https://basescan.org/tx/0xeab36352e8ebfa54a1c14d1f0c60b34178779491aace46c4cb6bbc6dcc646dc8",
          "timestamp": "2026-09-14T07:03:51.000Z",
          "txHash": "0xeab36352e8ebfa54a1c14d1f0c60b34178779491aace46c4cb6bbc6dcc646dc8"
        },
        {
          "amountUsdc": "0.001",
          "basescanUrl": "https://basescan.org/tx/0x426d5d3b117e381dc74addfc8d48cb221180ab58436f16a7a1a4234d612fcf2e",
          "timestamp": "2026-09-14T13:29:13.000Z",
          "txHash": "0x426d5d3b117e381dc74addfc8d48cb221180ab58436f16a7a1a4234d612fcf2e"
        },
        {
          "amountUsdc": "0.001",
          "basescanUrl": "https://basescan.org/tx/0x93a15735c5b82fb8c9fdc0f7db5d56916a14f6ee4ef343000a29fd55c4bcaf4c",
          "timestamp": "2026-09-15T20:38:56.825Z",
          "txHash": "0x93a15735c5b82fb8c9fdc0f7db5d56916a14f6ee4ef343000a29fd55c4bcaf4c"
        },
        {
          "amountUsdc": "0.001",
          "basescanUrl": "https://basescan.org/tx/0xcc43c1b62182321218673290083eaa2e16799f3a51222668ee2e15f22ea802c8",
          "timestamp": "2026-09-30T12:20:25.000Z",
          "txHash": "0xcc43c1b62182321218673290083eaa2e16799f3a51222668ee2e15f22ea802c8"
        }
      ],
      "totalUsdc": 0.004
    },
    {
      "count": 2,
      "endpoint": "https://audit.liquidlogicx.com/api/prove",
      "examples": [
        {
          "amountUsdc": "0.02",
          "basescanUrl": "https://basescan.org/tx/0xd4abd4a3b624966d75b5f1ca0bb93f9b29108a49089959e863eb6aed66717647",
          "timestamp": "2026-09-25T06:50:47.000Z",
          "txHash": "0xd4abd4a3b624966d75b5f1ca0bb93f9b29108a49089959e863eb6aed66717647"
        },
        {
          "amountUsdc": "0.02",
          "basescanUrl": "https://basescan.org/tx/0x9e38e77ff1c0fc3b4607b2aae9669fbc08112d7c0978abb1c6e34051281d626c",
          "timestamp": "2026-09-25T06:51:31.000Z",
          "txHash": "0x9e38e77ff1c0fc3b4607b2aae9669fbc08112d7c0978abb1c6e34051281d626c"
        }
      ],
      "totalUsdc": 0.04
    }
  ],
  "expired": 0,
  "frozenSeconds": 0,
  "held": 0,
  "network": "eip155:8453",
  "note": "Operating spend for x402 services (USDC on Base). Not a portfolio or growth report.",
  "paymentCount": 11,
  "recent": [
    {
      "amountUsdc": "0.05",
      "basescanUrl": "https://basescan.org/tx/0x9e69f6d6a0e2b7fe3997733398a6f7986adeb3f64066b421fa38c77d6f051c74",
      "endpoint": "https://audit.liquidlogicx.com/api/audit",
      "reason": "x402 payment received by payTo (Base chain-sync)",
      "timestamp": "2026-09-13T18:06:49.000Z",
      "txHash": "0x9e69f6d6a0e2b7fe3997733398a6f7986adeb3f64066b421fa38c77d6f051c74"
    },
    {
      "amountUsdc": "0.05",
      "basescanUrl": "https://basescan.org/tx/0x465910619fb6ba1fa3106b911098d435d4900e0bf2bce05b35f3c7e077643318",
      "endpoint": "https://audit.liquidlogicx.com/api/audit",
      "reason": "x402 payment received by payTo (Base chain-sync)",
      "timestamp": "2026-09-14T00:12:29.000Z",
      "txHash": "0x465910619fb6ba1fa3106b911098d435d4900e0bf2bce05b35f3c7e077643318"
    },
    {
      "amountUsdc": "0.05",
      "basescanUrl": "https://basescan.org/tx/0xa2013bf05ced393b8a678debd04711189cbded68fb57063bc80d28fd4cddbe90",
      "endpoint": "https://audit.liquidlogicx.com/api/audit",
      "reason": "x402 payment received by payTo (Base chain-sync)",
      "timestamp": "2026-09-14T01:07:29.000Z",
      "txHash": "0xa2013bf05ced393b8a678debd04711189cbded68fb57063bc80d28fd4cddbe90"
    },
    {
      "amountUsdc": "0.001",
      "basescanUrl": "https://basescan.org/tx/0xeab36352e8ebfa54a1c14d1f0c60b34178779491aace46c4cb6bbc6dcc646dc8",
      "endpoint": "https://audit.liquidlogicx.com/api/allowance",
      "reason": "x402 payment received by payTo (Base chain-sync)",
      "timestamp": "2026-09-14T07:03:51.000Z",
      "txHash": "0xeab36352e8ebfa54a1c14d1f0c60b34178779491aace46c4cb6bbc6dcc646dc8"
    },
    {
      "amountUsdc": "0.001",
      "basescanUrl": "https://basescan.org/tx/0x426d5d3b117e381dc74addfc8d48cb221180ab58436f16a7a1a4234d612fcf2e",
      "endpoint": "https://audit.liquidlogicx.com/api/allowance",
      "reason": "x402 payment received by payTo (Base chain-sync)",
      "timestamp": "2026-09-14T13:29:13.000Z",
      "txHash": "0x426d5d3b117e381dc74addfc8d48cb221180ab58436f16a7a1a4234d612fcf2e"
    },
    {
      "amountUsdc": "0.05",
      "basescanUrl": "https://basescan.org/tx/0x70fdaaf80af96825932de6237fb09548524813372ac14a0a215459405789cf5d",
      "endpoint": "https://audit.liquidlogicx.com/api/audit",
      "reason": "x402 payment received by payTo (Base chain-sync)",
      "timestamp": "2026-09-14T17:55:01.000Z",
      "txHash": "0x70fdaaf80af96825932de6237fb09548524813372ac14a0a215459405789cf5d"
    },
    {
      "amountUsdc": "0.05",
      "basescanUrl": "https://basescan.org/tx/0x5ae8ef780242dfd2f03a9f52a58fcec71a45e6aae6eb4b3a96107698c92411ea",
      "endpoint": "https://audit.liquidlogicx.com/api/audit",
      "reason": "x402 payment received by payTo (Base chain-sync)",
      "timestamp": "2026-09-14T17:59:29.000Z",
      "txHash": "0x5ae8ef780242dfd2f03a9f52a58fcec71a45e6aae6eb4b3a96107698c92411ea"
    },
    {
      "amountUsdc": "0.001",
      "basescanUrl": "https://basescan.org/tx/0x93a15735c5b82fb8c9fdc0f7db5d56916a14f6ee4ef343000a29fd55c4bcaf4c",
      "endpoint": "https://audit.liquidlogicx.com/api/allowance",
      "reason": "self-test",
      "timestamp": "2026-09-15T20:38:56.825Z",
      "txHash": "0x93a15735c5b82fb8c9fdc0f7db5d56916a14f6ee4ef343000a29fd55c4bcaf4c"
    },
    {
      "amountUsdc": "0.02",
      "basescanUrl": "https://basescan.org/tx/0xd4abd4a3b624966d75b5f1ca0bb93f9b29108a49089959e863eb6aed66717647",
      "endpoint": "https://audit.liquidlogicx.com/api/prove",
      "reason": "x402 payment received by payTo (Base chain-sync)",
      "timestamp": "2026-09-25T06:50:47.000Z",
      "txHash": "0xd4abd4a3b624966d75b5f1ca0bb93f9b29108a49089959e863eb6aed66717647"
    },
    {
      "amountUsdc": "0.02",
      "basescanUrl": "https://basescan.org/tx/0x9e38e77ff1c0fc3b4607b2aae9669fbc08112d7c0978abb1c6e34051281d626c",
      "endpoint": "https://audit.liquidlogicx.com/api/prove",
      "reason": "x402 payment received by payTo (Base chain-sync)",
      "timestamp": "2026-09-25T06:51:31.000Z",
      "txHash": "0x9e38e77ff1c0fc3b4607b2aae9669fbc08112d7c0978abb1c6e34051281d626c"
    },
    {
      "amountUsdc": "0.001",
      "basescanUrl": "https://basescan.org/tx/0xcc43c1b62182321218673290083eaa2e16799f3a51222668ee2e15f22ea802c8",
      "endpoint": "https://audit.liquidlogicx.com/api/allowance",
      "reason": "x402 payment received by payTo (Base chain-sync)",
      "timestamp": "2026-09-30T12:20:25.000Z",
      "txHash": "0xcc43c1b62182321218673290083eaa2e16799f3a51222668ee2e15f22ea802c8"
    }
  ],
  "source": "public_ledger",
  "totalUsdc": 0.294,
  "walletAddress": "0xEA24bafbBAF6d7Ba58bE860EE906f0Fe533d167D"
}

Use with an agent

  1. Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
  2. Inspect. Fetch /resources/36643.json for the price and payment options.
  3. Pay. Call GET https://audit.liquidlogicx.com/api/audit. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
  4. Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price
$0.05 / request
Protocol
x402 v2
Auth
No account or API key. Pay per request.
Networks
Base
Demand
4 calls · 2 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

SchemeNetworkAssetAmountPay toTimeout
exactBase
eip155:8453		USDC$0.050x147991A1c25e78f6D9225d2dBA61eD93A6158c7b300s
accepts[] (raw JSON)
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x147991A1c25e78f6D9225d2dBA61eD93A6158c7b",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "50000",
    "amountUsd": 0.05,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)
{
  "properties": {
    "example": {
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}
Example shape — generated from the schema, not a captured live response
{
  "example": {},
  "type": "string"
}

Examples

curl
curl "https://audit.liquidlogicx.com/api/audit"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://audit.liquidlogicx.com/api/audit");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}
Python
import httpx
res = httpx.get("https://audit.liquidlogicx.com/api/audit")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider
audit.liquidlogicx.com
Endpoint
https://audit.liquidlogicx.com/api/audit
Machine-readable
/resources/36643.json