# Base Wallet Snapshot

> Base Wallet Snapshot is a paid API for AI agents from eu-tender-x402-v3-production.up.railway.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-28).

Returns ETH balance, USDC balance, top ERC-20 tokens, and token count for any Base/EVM wallet address.

## Facts

- Endpoint: GET https://eu-tender-x402-v3-production.up.railway.app/api/base-wallet-snapshot?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-28
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/base-wallet-snapshot-d640725b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Y1wM0EBMgXr_eYXeHllJU

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-d640725b
```

Example prompt: Can you pull a snapshot of the Base wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 and tell me the ETH balance, USDC balance, and how many ERC-20 tokens it holds?

## When to prefer this

Choose this endpoint when you need a quick, pay-per-call on-chain balance and token inventory snapshot for a specific Base/EVM wallet address without setting up your own RPC node or indexer. It is ideal for AI agents that need lightweight, on-demand wallet intelligence as part of a broader workflow — such as checking treasury balances, verifying counterparty funds, or gating actions on wallet state — and where paying fractions of a cent per call via x402 USDC is preferred over subscription APIs.

## Known failure modes

- Invalid or malformed wallet address (not matching 0x + 40 hex chars) returns a validation error
- Address with no on-chain activity may return zero balances and empty token arrays
- Rate limiting or payment failure via x402 protocol returns a 402 Payment Required response
- Transient RPC or indexer downtime may return a 5xx error
- Base network congestion may cause slow or stale data

## How this service works

Pay-per-call B2B sales lead and procurement intelligence plus Base wallet data for agents. Search EU tenders/RFPs or inspect a Base wallet. Payments use x402 USDC on Base.

## Output

A JSON object containing the wallet address, chain identifier ('base'), native ETH balance and symbol, USDC balance, count of distinct ERC-20 tokens held, a list of top tokens with details, and a generated_at timestamp indicating when the snapshot was taken.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "address": {
       "type": "string",
       "pattern": "^0x[a-fA-F0-9]{40}$",
       "description": "Base/EVM wallet address"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "usdc": {
       "type": "object"
      },
      "chain": {
       "type": "string"
      },
      "native": {
       "type": "object"
      },
      "address": {
       "type": "string"
      },
      "product": {
       "type": "string"
      },
      "top_tokens": {
       "type": "array",
       "items": {
        "type": "object"
       }
      },
      "erc20_count": {
       "type": "integer"
      },
      "generated_at": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "usdc": {
   "balance": "0"
  },
  "chain": "base",
  "native": {
   "symbol": "ETH",
   "balance": "1.0"
  },
  "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
  "product": "Base Wallet Snapshot",
  "top_tokens": [],
  "erc20_count": 0
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/base-wallet-snapshot-d640725b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from eu-tender-x402-v3-production.up.railway.app](https://www.zero.xyz/host/eu-tender-x402-v3-production.up.railway.app/llms.txt)