# agentsvc.io EVM Balance Lookup

> agentsvc.io EVM Balance Lookup is a paid API for AI agents from agentsvc.io, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-10).

Returns ETH and USDC balances, transaction count, and block info for any EVM address on the Base network

## Facts

- Endpoint: POST https://agentsvc.io/api/v1/proxy/evm-balance?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentsvc-io-evm-balance-lookup-33b6b416
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_iUZ8rMg9FZqkgepzUucaz

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 agentsvc-io-evm-balance-lookup-33b6b416 -d '<json body>'
```

Example prompt: What are the current ETH and USDC balances for wallet address 0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27 on Base?

## When to prefer this

Use this endpoint when you need a quick, no-auth balance check for any EVM address on the Base L2 network, especially when your agent needs to verify it has sufficient USDC funds before executing paid API calls, or when you need both ETH and USDC balances plus transaction history in a single call. Prefer this over general blockchain explorers when you need structured JSON output optimized for agent consumption and don't want to parse HTML.

## Known failure modes

- Invalid address format (not a valid 0x-prefixed 40-hex-char address) returns a validation error
- Address not found or zero activity may return zero balances with no error
- Network timeouts if Base RPC is congested
- Stale data if block indexing lags behind chain tip

## How this service works

86 APIs for AI agents: web scraping and crawling to Markdown, AI summaries, data extraction and cited answers, screenshots and PDF, PDF, OCR and document conversion, news, paper and developer search and more, paid per call with USDC on Base, Solana, Polygon or Arbitrum via x402. No account, no API key, free sample on every service.

## Output

Returns a JSON object with the wallet's ETH balance (human-readable and in wei), USDC balance (human-readable and in atomic units), total transaction count, current block number, chain ID (8453 for Base), the USDC contract address used, and a convenience field showing how many x402 API calls the wallet could afford at $0.002 and $0.005 price points.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "address": {
   "type": "string",
   "pattern": "^0x[0-9a-fA-F]{40}$",
   "description": "EVM address on Base"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "eth": "0.0041",
   "usdc": "12.5",
   "address": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27",
   "eth_wei": "4100000000000000",
   "network": "base",
   "chain_id": 8453,
   "tx_count": 17,
   "checked_at": "2026-09-09T12:00:00.000Z",
   "usdc_atomic": "12500000",
   "block_number": 41234567,
   "usdc_contract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
   "x402_calls_affordable": {
    "at_0_002": 6250,
    "at_0_005": 2500
   }
  },
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentsvc-io-evm-balance-lookup-33b6b416/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentsvc.io](https://www.zero.xyz/host/agentsvc.io/llms.txt)