# httpay.xyz Arbitrum RPC Gateway

> httpay.xyz Arbitrum RPC Gateway is a paid API for AI agents from httpay.xyz, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Proxies JSON-RPC calls to the Arbitrum network via a pay-per-call API gateway

## Facts

- Endpoint: POST https://httpay.xyz/api/gateway/eth-arbitrum/%7B*path%7D/*
- 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/httpay-xyz-62af1635
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Mb9QFZ20zBQs9Mwe8EF91

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 httpay-xyz-62af1635 -d '<json body>'
```

Example prompt: Send a eth_call JSON-RPC request to the Arbitrum network to read the USDC balance of address 0xAbCd...1234 on contract 0x1234...abcd — use the pay-per-call Arbitrum RPC gateway.

## When to prefer this

Use this endpoint when you need programmatic access to the Arbitrum L2 network without managing your own RPC node, especially in pay-as-you-go agentic contexts where per-call micropayment billing (x402/USDC) is preferred over subscription-based RPC providers.

## Known failure modes

- Invalid JSON-RPC method returns error response
- Malformed params cause parse error
- Insufficient x402 payment results in 402 Payment Required
- Network congestion causes timeout
- Invalid transaction data returns execution revert
- Unsupported Arbitrum-specific method returns method not found

## How this service works

API Gateway: Arbitrum RPC

## Output

A standard Ethereum JSON-RPC response object containing the result field with the requested data (e.g. balance, block info, transaction receipt, contract return value) or an error object if the call failed.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/httpay-xyz-62af1635/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from httpay.xyz](https://www.zero.xyz/host/httpay.xyz/llms.txt)