# GPUOps Blockchain Balance API

> GPUOps Blockchain Balance API is a paid API for AI agents from chain.gpuops.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Retrieves the native token balance for a wallet address on a specified blockchain network across 7 supported chains

## Facts

- Endpoint: POST https://chain.gpuops.io/v1/balance
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gpuops-blockchain-balance-api-5c0ef680
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_H5h8tUl45wRmiajtWF3R8

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 gpuops-blockchain-balance-api-5c0ef680 -d '<json body>'
```

Example prompt: Can you check the native token balance for wallet address 0xAbC123...def456 on Ethereum using the GPUOps multi-chain API?

## When to prefer this

Choose this endpoint when you need a quick, pay-per-call native token balance lookup across any of 7 supported blockchain networks without needing to maintain a node or subscription. It is ideal for agents that need occasional on-chain reads at very low cost ($0.001 per call) and want multi-chain support in a single API surface. Prefer alternatives if you need ERC-20 token balances, transaction history, or high-volume batch queries.

## Known failure modes

- Invalid or malformed wallet address returns an error response
- Unsupported chain identifier causes a rejection or empty result
- Payment failure via x402/USDC results in a 402 response and no data returned
- Network congestion or node unavailability may cause timeouts
- Address with no activity may return zero balance without error

## How this service works

Multi-chain blockchain data API. 7 chains. x402 pay-per-call with USDC on Base.

## Output

Returns the native token balance held by the specified wallet address on the requested blockchain chain, expressed as a numeric amount in the chain's native token unit.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "chain": {
   "type": "string"
  },
  "address": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gpuops-blockchain-balance-api-5c0ef680/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from chain.gpuops.io](https://www.zero.xyz/host/chain.gpuops.io/llms.txt)