# Delx Base Native Balance

> Delx Base Native Balance is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Returns the native ETH balance for a single Ethereum address on Base mainnet via live JSON-RPC, charged at $0.001 USDC per call.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/base-balance
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-base-native-balance-28d3226f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_W1yyoQQ3eAorsZ6-gzUPc

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 delx-base-native-balance-28d3226f -d '<json body>'
```

Example prompt: What's the current native ETH balance of the wallet 0x4838B106FCe9647Bdf1E7877BF73cE8B0BAD5f97 on Base mainnet?

## When to prefer this

Choose this endpoint when you need a live, real-time native ETH balance on Base mainnet for a single address and are comfortable with a micro-payment ($0.001 USDC) per call. Prefer it over general-purpose RPC nodes when you need a simple, agent-friendly API without managing your own RPC infrastructure or API keys.

## Known failure modes

- Invalid or malformed Ethereum address returns an error response
- Network or RPC connectivity issues may cause timeouts or 5xx errors
- Payment failure (insufficient USDC or x402 payment not processed) results in a 402 response
- Address with no on-chain activity may return a zero balance (not an error)

## How this service works

Native ETH balance for one address on Base mainnet for $0.001 USDC via live JSON-RPC. Call when you need this bounded result without an API key or subscription. Returns machine-readable JSON via x402 on Base or Solana. Limitation: results cover only the supplied input or one bounded public endpoint at request time; callers must verify before acting.

## Output

Returns the native ETH balance (in wei or ETH) for the queried address on Base mainnet, sourced from a live JSON-RPC call at the time of the request.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {},
  "tool_name": "get_base_native_balance"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-base-native-balance-28d3226f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)