# HTTPay Gas Golfing Tip API

> HTTPay Gas Golfing Tip API is a paid API for AI agents from httpay.xyz, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Returns a random Solidity gas optimization tip for smart contract developers, paid per-call via USDC on Base with no API key required.

## Facts

- Endpoint: POST https://httpay.xyz/api/gas-golfing-tip
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/httpay-gas-golfing-tip-api-8838697a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_R94-hfw7BapXBhU8Xb41d

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-gas-golfing-tip-api-8838697a -d '<json body>'
```

Example prompt: Give me a random Solidity gas optimization tip — something I can apply to my smart contract to reduce transaction costs on Base.

## When to prefer this

Choose this endpoint when you need quick, actionable Solidity gas optimization advice without setting up API keys or subscriptions. Ideal for developer tools, coding assistants, or smart contract auditing workflows that want to surface gas-saving patterns on demand. At $0.005 per call with no onboarding friction, it suits low-volume, ad-hoc developer tooling.

## Known failure modes

- 402 Payment Required if USDC payment via x402 is not attached or insufficient
- Network errors reaching httpay.xyz
- Occasionally generic or repeated tips due to random selection
- No input validation needed but payment must be on Base network

## How this service works

Random Solidity gas optimization tip

## Output

A JSON object containing a description field with a random Solidity gas optimization tip, such as advice on using efficient opcodes, storage layout, calldata encoding, or other EVM-level optimizations.

## Example request

```json
{
 "query": "ethereum gas prices"
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "description": "Random Solidity gas optimization tip"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/httpay-gas-golfing-tip-api-8838697a/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)