# GPUOps Arbitrum RPC Endpoint

> GPUOps Arbitrum RPC Endpoint is a paid API for AI agents from chain.gpuops.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Provides pay-per-call JSON-RPC access to the Arbitrum blockchain network via x402 micropayments

## Facts

- Endpoint: POST https://chain.gpuops.io/v1/rpc/arbitrum
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gpuops-arbitrum-rpc-endpoint-00e49da0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gNx7B-ryJuZJt0OuEknwY

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-arbitrum-rpc-endpoint-00e49da0 -d '<json body>'
```

Example prompt: Can you check the current ETH balance for wallet address 0xAbC123... on the Arbitrum network using the eth_getBalance RPC method?

## When to prefer this

Choose this endpoint when you need pay-as-you-go Arbitrum RPC access without committing to a subscription, especially useful for agents making sporadic or low-volume blockchain queries. Ideal for multi-chain workflows where cost-per-call transparency via x402 USDC micropayments is preferred over monthly API key billing.

## Known failure modes

- Payment failure if insufficient USDC balance for x402 micropayment
- Invalid JSON-RPC method name returns error code -32601
- Malformed params array causes -32602 invalid params error
- Rate limiting or node unavailability returns 503
- Non-existent block or transaction hash returns null result

## How this service works

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

## Output

Standard Ethereum JSON-RPC response object containing the requested blockchain data — block details, transaction info, account state, log entries, or contract call results — depending on the method called.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "id": {
   "type": "integer"
  },
  "method": {
   "type": "string"
  },
  "params": {
   "type": "array"
  },
  "jsonrpc": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gpuops-arbitrum-rpc-endpoint-00e49da0/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)