# Free Asset Radar x402 – Base Wallet Balance

> Free Asset Radar x402 – Base Wallet Balance is a paid API for AI agents from free-asset-radar-x402.besenok2018.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-29).

Returns the ETH, USDC, and token balances of a wallet address on the Base network (EIP-155 chain 8453)

## Facts

- Endpoint: GET https://free-asset-radar-x402.besenok2018.workers.dev/api/x402/base-wallet-balance?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/free-asset-radar-x402-base-wallet-balance-350ccb86
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6WIFmbPqYKY_75Zd2xtz5

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 free-asset-radar-x402-base-wallet-balance-350ccb86
```

Example prompt: What's the current ETH and USDC balance for wallet 0xAbC123...def on Base mainnet?

## When to prefer this

Use this endpoint when you need a lightweight, pay-per-call balance lookup specifically on Base mainnet (EIP-155 chain 8453) without setting up your own RPC node. It is ideal for autonomous agents that need to verify wallet funds before executing a transaction, for portfolio monitoring bots, or for any workflow requiring real-time on-chain balance data on Base with minimal setup overhead. Prefer alternatives if you need multi-chain balance aggregation or historical balance data.

## Known failure modes

- Invalid or missing wallet address returns empty balances or an error
- Wallet with zero activity returns 0 for ETH and USDC with an empty tokens array
- Network congestion or RPC downtime may cause delayed or failed responses
- Malformed address format results in a request error
- Non-Base EVM addresses return no data as only Base (eip155:8453) is supported

## How this service works

Stable edge-hosted x402 utilities for autonomous agents.

## Output

A JSON object containing the wallet's ETH balance (as a string), USDC balance (as a string), an array of additional token holdings, and the network identifier ('eip155:8453' for Base mainnet).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "required": {
   "type": "string"
  },
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "eth": "0",
  "usdc": "0",
  "tokens": [],
  "network": "eip155:8453"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/free-asset-radar-x402-base-wallet-balance-350ccb86/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from free-asset-radar-x402.besenok2018.workers.dev](https://www.zero.xyz/host/free-asset-radar-x402.besenok2018.workers.dev/llms.txt)