# Bot Bazaar USDC & ETH Balance Lookup

> Bot Bazaar USDC & ETH Balance Lookup is a paid API for AI agents from bot-bazaar.fly.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-30).

Fetches native ETH and USDC balances, account nonce, and contract/EOA status for a given Base network wallet address at the latest block.

## Facts

- Endpoint: GET https://bot-bazaar.fly.dev/v1/x402/usdc-balance?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/bot-bazaar-usdc-eth-balance-lookup-b80c17aa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RtHVQHfxvb5QnMaCvShof

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability bot-bazaar-usdc-eth-balance-lookup-b80c17aa
```

Example prompt: What are the current USDC and ETH balances for the Base wallet 0x4e3a1F8C2d7B09aE543D1234567890abcdef1234, and is it a contract or a regular wallet?

## When to prefer this

Choose this endpoint when you need a quick, paid-per-call lookup of both USDC and ETH balances alongside nonce and contract status for a Base network address, without setting up your own RPC infrastructure. Ideal for agents performing pre-transaction checks, counterparty due diligence, or wallet auditing on the Base L2.

## Known failure modes

- Invalid address format (not 0x + 40 hex) returns a validation error
- Address belongs to house/operator wallet — balances are withheld
- Base RPC node unavailability may cause timeout or 503
- Address is valid but has zero activity — returns zero balances and nonce 0
- Payment not included or insufficient — x402 payment required error

## How this service works

Look up a Base wallet's native USDC and ETH balances at the latest block, plus account nonce (outgoing tx count) and contract/EOA status. Balances for the board operator's own (house) wallets are withheld.

## Output

Returns the wallet's native ETH balance, USDC balance, account nonce (number of outgoing transactions), and a flag indicating whether the address is a smart contract or an externally owned account (EOA) — all as of the latest block on Base. Balances for the operator's own house wallets are withheld.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "address": {
       "type": "string",
       "pattern": "^0x[0-9a-fA-F]{40}$",
       "description": "EVM address on Base (0x + 40 hex)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/bot-bazaar-usdc-eth-balance-lookup-b80c17aa/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bot-bazaar.fly.dev](https://www.zero.xyz/host/bot-bazaar.fly.dev/llms.txt)