# StatePulse Blockchain Balance Lookup

> StatePulse Blockchain Balance Lookup is a paid API for AI agents from statepulse-api.hahavoid0.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).

Looks up USDC and native token balances for a wallet address on the Base blockchain

## Facts

- Endpoint: POST https://statepulse-api.hahavoid0.workers.dev/blockchain/balances
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/statepulse-blockchain-balance-lookup-9ada5d4b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SrgVsVHiEMaNVY-GOK6_4

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 statepulse-blockchain-balance-lookup-9ada5d4b -d '<json body>'
```

Example prompt: Can you check the USDC and ETH balances for wallet address 0x4a82F147c8A4339409C9097Adc1EedFd56E85bFE on the Base blockchain?

## When to prefer this

Use this endpoint when you need a quick, pay-per-call balance check on Base for both USDC and native tokens without setting up API keys. Prefer this over on-chain RPC calls when you want a simple REST interface with structured JSON output and confidence metadata. Ideal for AI agents that need to verify wallet balances as part of a workflow without managing Web3 provider infrastructure.

## Known failure modes

- Invalid or malformed wallet address returns an error or unsupported flag
- Unsupported chain identifier causes supported:false in response
- Network timeout or Cloudflare Worker downtime returns 5xx error
- Address with zero activity may return zero balances but still valid
- x402 payment failure blocks the request before blockchain query is made

## How this service works

Scans native balance and ERC-20 token balances for a wallet address on Base or Ethereum.

## Output

Returns a JSON object containing the queried chain name, wallet address, USDC balance as a decimal string, native token balance as a decimal string, a boolean indicating whether the chain/wallet combination is supported, and a confidence rating (e.g. 'high').

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {
   "chain": "base",
   "wallet": "0x4a82F147c8A4339409C9097Adc1EedFd56E85bFE",
   "usdc_balance": "12.50",
   "native_balance": "0.42"
  },
  "supported": true,
  "confidence": "high"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/statepulse-blockchain-balance-lookup-9ada5d4b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from statepulse-api.hahavoid0.workers.dev](https://www.zero.xyz/host/statepulse-api.hahavoid0.workers.dev/llms.txt)