# Orbit Chain Reads: Wallet Balance

> Orbit Chain Reads: Wallet Balance is a paid API for AI agents from orbit-chain.orbit-builder.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-30).

Returns native coin balance, USDC balance, transaction count, contract status, and explorer link for any EVM address on Base, Ethereum, Arbitrum, Optimism, or Polygon

## Facts

- Endpoint: GET https://orbit-chain.orbit-builder.workers.dev/v1/balance?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/orbit-chain-reads-wallet-balance-a4d82bda
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XwuIgDhyYTaOzdSMlwIU3

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 orbit-chain-reads-wallet-balance-a4d82bda
```

Example prompt: What's the ETH and USDC balance of 0x4200000000000000000000000000000000000006 on Base right now, and is it a smart contract?

## When to prefer this

Choose this endpoint when you need a quick, multi-chain wallet balance lookup covering both native coin and USDC in a single call, especially when you also need contract detection or EIP-7702 delegation status. It is ideal for agents verifying wallet funding, auditing on-chain activity, or enriching user profile data with live blockchain state across the five most popular EVM networks. Prefer it over raw RPC calls when you want a structured, normalized response without managing multiple provider connections.

## Known failure modes

- Invalid or malformed address returns an error response
- Unsupported chain name returns an error
- Public RPC downtime or rate-limiting may cause timeouts or failed reads
- Address with zero activity still returns valid zero-balance response
- Network congestion may cause stale or delayed RPC data

## How this service works

Live EVM chain reads for agents across Base, Ethereum, Arbitrum, Optimism and Polygon: gas fees, wallet balances (native + USDC), transaction status, ERC-20 metadata and ENS resolution. Every answer is read from public RPC nodes at call time. $0.001 per call. By orbit-builder.

## Output

A JSON object containing: the queried chain name, the EVM address, native coin balance in both wei and human-readable decimal form with symbol, USDC balance in both atomic and decimal form with the USDC contract address, transaction count (nonce), a boolean indicating whether the address is a contract, a boolean for EIP-7702 delegation status, and a block explorer link.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "chain": {
       "type": "string",
       "description": "base (default), ethereum, arbitrum, optimism, polygon, or all"
      },
      "address": {
       "type": "string",
       "description": "0x EVM address"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "usdc": {
   "amount": "0",
   "atomic": "0",
   "contract": "0x8335…2913"
  },
  "chain": "base",
  "native": {
   "wei": "123",
   "amount": "0.000000000000000123",
   "symbol": "ETH"
  },
  "address": "0x4200000000000000000000000000000000000006",
  "tx_count": 1,
  "is_contract": true,
  "eip7702_delegated": false
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/orbit-chain-reads-wallet-balance-a4d82bda/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from orbit-chain.orbit-builder.workers.dev](https://www.zero.xyz/host/orbit-chain.orbit-builder.workers.dev/llms.txt)