# Base Wallet Snapshot

> Base Wallet Snapshot is a paid API for AI agents from api.arysphere.com, paid per call via x402, $0.003/call, status down (last checked 2026-10-27).

Returns a batched snapshot of an Ethereum Base-chain address including native ETH balance, nonce, contract flag, and balances of 10 major Base tokens with USD values, cached for 60 seconds.

## Facts

- Endpoint: POST https://api.arysphere.com/v1/ventures/x402_eth_reads_v1/base_wallet_snapshot?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: down
- Last checked: 2026-10-27
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/base-wallet-snapshot-618e406b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_n6ZZ3x_T2yq4Oixu5AMze

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 base-wallet-snapshot-618e406b -d '<json body>'
```

Example prompt: Give me a full wallet snapshot for 0x4838B106FCe9647Bdf1E7877BF73cE8B0BAD5f97 on Base — I want to see the ETH balance, all top token balances like USDC, cbETH, and DEGEN, and the total USD value.

## When to prefer this

Choose this endpoint when you need a comprehensive, multi-token portfolio snapshot for a Base chain address in a single call rather than making separate balance queries per token. It is ideal for DeFi dashboards, wallet audits, and agent workflows that need a broad view of a Base address's holdings including both native ETH and major Base ecosystem tokens. Not suitable if you need balances for tokens outside the fixed 10, real-time (sub-60s) data, or Ethereum mainnet addresses.

## Known failure modes

- Invalid address format (not matching 0x + 40 hex) returns validation error
- Address not found or zero-activity wallet returns all-zero balances
- Cache miss may result in slightly higher latency on first call
- Only the fixed 10 tokens are returned; other token balances are not included
- Network congestion on Base may cause read timeout

## Output

A structured wallet snapshot including: native ETH balance and its USD value, the address nonce, a boolean indicating whether the address is a smart contract, and individual token balances for WETH, USDC, USDbC, DAI, cbETH, wstETH, cbBTC, AERO, VIRTUAL, and DEGEN — with USD values provided for ETH, WETH, and dollar stablecoins. Data is batched from a single on-chain read and cached for 60 seconds.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "address": {
       "type": "string",
       "pattern": "^0x[0-9a-fA-F]{40}$",
       "description": "wallet or contract, 0x + 40 hex"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/base-wallet-snapshot-618e406b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.arysphere.com](https://www.zero.xyz/host/api.arysphere.com/llms.txt)