# Free sample → paid outline

## Convert now · **0.01 USDC** on Base
- **Price:** 0.01 USDC · network `eip155:8453` · asset USDC · scheme x402 exact
- **payTo:** `0xE79e7fa7Ce7259C46F9B127b837d2907Bb036F95`
- **Why buy full:** free teaser is only 3 bullets. Paid `POST /v0/outline` returns the complete outline (full bullet set + lens) for your topic — enough to brief, bid, or scope without guessing.

```bash
curl -sS -X POST https://x402.devvizion.com/v0/outline \
  -H "Content-Type: application/json" \
  -d "{\"topic\":\"x402\"}"
# unpaid → HTTP 402 + accepts[] → settle exact USDC on Base → retry with X-PAYMENT
```

## Free teaser — 3 of 4 bullets

_topic `x402` · lens payments · 2026-07-18T23:33:25.175Z_

- Define buyer flow: 402 → wallet pay → retry with payment header
- Pick facilitator (x402.org test vs CDP/PayAI mainnet)
- Set `payTo` on Base; never store signing keys on API host

_…1 more bullets + full lens only on paid POST /v0/outline._

## Metadata
```json
{
  "topic": "x402",
  "tier": "sample-outline",
  "free": true,
  "priceUsdc": "0.01",
  "payTo": "0xE79e7fa7Ce7259C46F9B127b837d2907Bb036F95",
  "network": "eip155:8453",
  "paidPath": "https://x402.devvizion.com/v0/outline",
  "version": "0.3.51"
}
```