# 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 Ethereum Base network RPC calls through a pay-per-use x402 payment 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-api-gateway-base-rpc-0ee09e6c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_spuA1woPMLpZ5KkyrdVHu

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-api-gateway-base-rpc-0ee09e6c -d '<json body>'
```

Example prompt: Call eth_getBalance on Base mainnet for address 0xAbC123... using the httpay RPC gateway and tell me the balance in ETH.

## When to prefer this

Use this endpoint when you need Ethereum Base network RPC access on a pay-per-use basis without provisioning your own node or managing API keys — ideal for agents that make infrequent or unpredictable Base RPC calls and want to pay per call in USDC via x402 protocol.

## Known failure modes

- 402 Payment Required if x402 payment header is missing or insufficient
- Invalid JSON-RPC method returns error code -32601
- Malformed params returns -32602 invalid params error
- Network timeout if Base node is congested
- Rate limiting if too many requests exceed gateway capacity
- Unsupported RPC method may return not-implemented error

## How this service works

API Gateway: Base RPC

## Output

Standard Ethereum JSON-RPC response object containing the result of the requested RPC method — e.g. block data, account balance, transaction receipt, or contract call output — or an error object if the call fails.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/httpay-xyz-api-gateway-base-rpc-0ee09e6c/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)