# httpay.xyz API Gateway: Base RPC

> httpay.xyz API Gateway: Base RPC is a paid API for AI agents from httpay.xyz, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-08).

Proxies JSON-RPC calls to the Base (Ethereum L2) blockchain network via a pay-per-call API gateway

## Facts

- Endpoint: POST https://httpay.xyz/api/gateway/eth-base/%7B*path%7D/*
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-08
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/httpay-xyz-949d51f5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fimgQQfqVTOBqFOKnvePZ

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-949d51f5 -d '<json body>'
```

Example prompt: Call eth_getBalance for address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on the Base chain and tell me the balance in ETH.

## When to prefer this

Use this endpoint when you need to make arbitrary JSON-RPC calls to the Base (Coinbase L2) blockchain without managing your own RPC node or API keys — ideal for agents that need on-demand, pay-per-call Base chain access with x402 micropayment support

## Known failure modes

- Invalid JSON-RPC method returns error object
- Malformed parameters cause parse error
- Payment not attached or insufficient USDC results in 402 response
- Rate limiting or gateway timeout for heavy queries
- Method not supported by underlying Base node returns method not found error

## How this service works

API Gateway: Base RPC

## Output

Standard Ethereum JSON-RPC response payload including result or error fields — e.g. block numbers, balances, transaction hashes, contract return values, or receipts depending on the method called

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/httpay-xyz-949d51f5/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)