# NetIntel Wallet Balance Lookup

> NetIntel Wallet Balance Lookup is a paid API for AI agents from netintel-production-440c.up.railway.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Returns native token, USDC, and optional ERC-20 token balances for a given wallet address on Base, Ethereum, or Solana

## Facts

- Endpoint: GET https://netintel-production-440c.up.railway.app/wallet/balance
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/netintel-wallet-balance-lookup-9f124ea9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SWu06qONuyeIOhTbQEa9q

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 netintel-wallet-balance-lookup-9f124ea9
```

Example prompt: What's the current ETH and USDC balance for wallet 0x4f3c04c3f17264b83ae884df7985142b7dc8047c on Base?

## When to prefer this

Choose this endpoint when you need a quick, no-signup, pay-per-call wallet balance check across Base, Ethereum, or Solana without provisioning API keys. It is especially useful for AI agents needing on-chain financial context (e.g. verifying a payer's USDC balance before authorizing a transaction) or for lightweight portfolio queries. Prefer it over full indexer APIs when you only need current balances rather than transaction history or NFT data.

## Known failure modes

- Invalid wallet address format returns an input-validation error (not billed)
- Unsupported chain value returns a validation rejection (not billed)
- Upstream RPC unavailability may cause a server error response (not billed)
- Token contract address list exceeding 10 items is rejected at validation
- Solana address provided for an EVM chain or vice versa causes validation failure
- Stale flag may be true if cached data is returned during RPC instability

## How this service works

Network intelligence API — 138 endpoints, all pay-per-call via x402 micropayments (USDC on Base or Solana mainnet).

NetIntel is agent fair-trade aligned: transparent per-call pricing in USDC on Base or Solana via x402, no API keys or signup, and automatic no-charge on server errors, upstream failures, and input-validation rejections — failed calls are never billed across NetIntel's network, domain, and data-intelligence endpoints.

## Output

Returns a JSON object with the wallet's native token balance (raw wei/lamports, formatted amount, symbol, and USD value), USDC balance (raw, formatted, and USD), an array of any requested ERC-20 token balances, the chain name, the RPC source URL used, a stale flag, cache age in seconds, and an empty findings array.

## 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, or solana (eth/sol accepted). Alias: network"
      },
      "tokens": {
       "type": "string",
       "description": "EVM only: comma list of up to 10 ERC-20 contract addresses for extra balances"
      },
      "address": {
       "type": "string",
       "description": "Wallet address: 0x + 40 hex chars on base/ethereum, base58 on solana. Aliases: wallet, account, addr"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "usdc": {
       "type": "object",
       "properties": {
        "raw": {
         "type": [
          "string",
          "null"
         ]
        },
        "usd": {
         "type": [
          "number",
          "null"
         ]
        },
        "formatted": {
         "type": [
          "number",
          "null"
         ]
        }
       }
      },
      "chain": {
       "type": "string"
      },
      "stale": {
       "type": "boolean"
      },
      "native": {
       "type": "object",
       "properties": {
        "raw": {
         "type": "string",
         "description": "raw units (wei/lamports) as a decimal string"
        },
        "usd": {
         "type": [
          "number",
          "null"
         ]
        },
        "symbol": {
         "type": "string"
        },
        "formatted": {
         "type": "number"
        }
       }
      },
      "source": {
       "type": "string",
       "description": "the RPC that answered"
      },
      "tokens": {
       "type": "array",
       "items": {
        "type": "object",
        "properties": {
         "raw": {
          "type": [
           "string",
           "null"
          ]
         },
         "usd": {
          "type": [
           "number",
           "null"
          ]
 
… (truncated)
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "usdc": {
   "raw": "3519150",
   "usd": 3.52,
   "formatted": 3.51915
  },
  "chain": "base",
  "stale": false,
  "native": {
   "raw": "0",
   "usd": 0,
   "symbol": "ETH",
   "formatted": 0
  },
  "source": "https://mainnet.base.org",
  "tokens": [],
  "address": "0x4f3c04c3f17264b83ae884df7985142b7dc8047c",
  "findings": [],
  "cache_age_seconds": 0
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/netintel-wallet-balance-lookup-9f124ea9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from netintel-production-440c.up.railway.app](https://www.zero.xyz/host/netintel-production-440c.up.railway.app/llms.txt)