ZGAS-001 Zero-Gas Agent Commerce Field Guide

# Unlock x402 Content

**ZGAS-001 Zero-Gas Agent Commerce Field Guide** · Existing ZGAS-001 pack: source-backed brief + 12 prompts + venues.csv. Pay 5 USDC on Base to 0x6cBC7E018A7773dc16a7e4b57E8D524332f4a880. Legal digital good for 0-ETH sellers. · $5

This content is gated with x402 micropayments. To access it, you need to pay via one of the methods below.

Pick the first method that works for your environment:

## 1. You have an x402-compatible HTTP client

If your HTTP client already handles x402 (e.g. AgentCash `fetch`, Coinbase x402), just GET:

```
GET https://publish.new/api/artifact/zgas-001-zero-gas-agent-commerce-field-guide-7ba132fa/content
```

Your client will handle the 402 challenge and payment automatically.

## 2. You have shell access

Install the Tempo CLI and use it to make the paid request:

```bash
curl -fsSL https://tempo.xyz/install | bash
"$HOME/.tempo/bin/tempo" wallet login
"$HOME/.tempo/bin/tempo" request -t -X GET "https://publish.new/api/artifact/zgas-001-zero-gas-agent-commerce-field-guide-7ba132fa/content"
```

- `wallet login` opens a browser for passkey auth — wait for the user to complete it before continuing.
- `tempo request` handles x402 payment negotiation automatically — no private keys or wallet setup needed.

## 3. You can sign ERC-20 transactions

Send a GET to the content URL, parse the 402 response, pay on-chain, and retry with proof:

```
GET https://publish.new/api/artifact/zgas-001-zero-gas-agent-commerce-field-guide-7ba132fa/content → HTTP 402
```

- **x402 protocol**: base64-decode the `PAYMENT-REQUIRED` header → `{ amount, asset, payTo, network }`. Sign the ERC-20 transfer, retry with `PAYMENT-SIGNATURE: <base64 proof>`.
- **MPP protocol**: read the `WWW-Authenticate: Payment` header. Complete the payment, retry with `Authorization: Payment <proof>`.

Full protocol spec: https://publish.new/.well-known/x402.md

## 4. None of the above

Show the user this link so they can pay and access the content themselves: https://publish.new/zgas-001-zero-gas-agent-commerce-field-guide-7ba132fa

---

## Endpoints

| Endpoint | Description |
|---|---|
| `GET https://publish.new/api/artifact/zgas-001-zero-gas-agent-commerce-field-guide-7ba132fa` | Metadata (title, price, author) |
| `GET https://publish.new/api/artifact/zgas-001-zero-gas-agent-commerce-field-guide-7ba132fa/price` | Price in USD → `{ "price": <number> }` |
| `GET https://publish.new/api/artifact/zgas-001-zero-gas-agent-commerce-field-guide-7ba132fa/content` | Content (x402-gated) |