# Mint Intel: Base Chain Portfolio Balances

> Mint Intel: Base Chain Portfolio Balances is a paid API for AI agents from mintintel.35-171-220-195.sslip.io, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-31).

Returns the native ETH balance and up to 20 ERC-20 token balances for a given Base chain wallet address in a single batched JSON-RPC call.

## Facts

- Endpoint: GET https://mintintel.35-171-220-195.sslip.io/v1/base/portfolio/:address?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mint-intel-base-chain-portfolio-balances-57aada4b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_a1CbXjb-CYWtqHCAVFSge

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 mint-intel-base-chain-portfolio-balances-57aada4b
```

Example prompt: What's the current ETH and USDC balance for Base wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045? Also include WETH and cbBTC if possible.

## When to prefer this

Use this endpoint when you need a quick multi-token balance snapshot for a Base chain wallet in a single call — especially useful for portfolio checks, wallet monitoring, or DeFi agent workflows. Prefer this over raw RPC calls when you want aggregated ETH + ERC-20 balances without managing batched JSON-RPC yourself. Choose this over Ethereum or Solana equivalents specifically for Base (L2) addresses.

## Known failure modes

- Invalid or malformed wallet address returns an error or empty response
- Requesting more than 20 token addresses may be rejected or truncated
- Unknown or non-ERC-20 contract addresses will return zero balance or an error
- Temporary RPC node unavailability may cause a timeout or 5xx response
- Address with no activity may return zero balances for all tokens (valid but potentially confusing)

## How this service works

Live Base wallet balance - native ETH plus up to 20 ERC-20 balances (default: major tokens such as USDC, WETH, cbBTC, AERO; or caller-supplied ?tokens=) in one bounded JSON-RPC batch (eth_getBalance + balanceOf).

## Output

A JSON object containing the queried wallet address, the native ETH balance (in wei and/or formatted ETH), and an array of ERC-20 token entries each with the token contract address and the wallet's balance — covering up to 20 tokens (defaulting to major Base tokens like USDC, WETH, cbBTC, and AERO if none are specified).

## 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"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "address": {
       "type": "string",
       "description": "0x-prefixed 20-byte EVM address"
      }
     },
     "additionalProperties": false
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "tokens": {
       "type": "string",
       "description": "optional comma-separated ERC-20 addresses (max 20); default: major tokens (USDC, WETH, ...)"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "address",
      "native",
      "tokens"
     ],
     "properties": {
      "native": {
       "type": "object"
      },
      "tokens": {
       "type": "array"
      },
      "address": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mint-intel-base-chain-portfolio-balances-57aada4b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mintintel.35-171-220-195.sslip.io](https://www.zero.xyz/host/mintintel.35-171-220-195.sslip.io/llms.txt)