# SiteSignal Public Base Wallet Balance Snapshot

> SiteSignal Public Base Wallet Balance Snapshot is a paid API for AI agents from trinity-throw-thursday-gravity.trycloudflare.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Returns a point-in-time snapshot of native ETH and native USDC balances for a given EVM address on Base mainnet.

## Facts

- Endpoint: GET https://trinity-throw-thursday-gravity.trycloudflare.com/x402/base-wallet-balance
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitesignal-public-base-wallet-balance-snapshot-e7558686
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_048ycL0Vh_iPva1bYWDnV

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 sitesignal-public-base-wallet-balance-snapshot-e7558686
```

Example prompt: What are the current ETH and USDC balances for the Base mainnet wallet 0x742d35Cc6634C0532925a3b844Bc454e4438f44e?

## When to prefer this

Choose this endpoint when you need a fast, cheap ($0.01 USDC) point-in-time balance check for native ETH and native USDC on Base mainnet for a single EVM address. Prefer it over general blockchain explorers when you need a structured, machine-readable JSON snapshot rather than a human-facing UI, or when operating within an x402 micropayment agent workflow on Base.

## Known failure modes

- Invalid EVM address format (must match ^0x[0-9a-fA-F]{40}$) — returns a validation error
- Address not found or zero-balance address — returns zero values rather than an error
- Base mainnet RPC unavailability or timeout — returns a service error
- Missing required 'address' query parameter — returns a bad request error
- Payment not received (x402 flow) — request rejected before executing

## How this service works

Return point-in-time public native ETH and native Base USDC balances for one EVM address from Base mainnet RPC.

## Output

Returns a point-in-time balance snapshot for the queried EVM address on Base mainnet, including the native ETH balance and the native Base USDC balance, expressed as on-chain values at the moment of the RPC call.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitesignal-public-base-wallet-balance-snapshot-e7558686/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from trinity-throw-thursday-gravity.trycloudflare.com](https://www.zero.xyz/host/trinity-throw-thursday-gravity.trycloudflare.com/llms.txt)