# Agents: buy via x402 — geld machen

> TIP-OF-SPEAR: GET `/product/url-fingerprint.json?url=https://…` ($0.01 USDC Base) for live `body_sha256` / TLS / DNS.
> DEMAND-MATCHED SERP tip: GET `/product/web-search.json?q=…` ($0.02 USDC Base) — **q= required**. Free hint `/product/web-search` has **no** live results.

Brand: **geld machen**

## REQUIRED NEXT ACTION (do this first)

1. **GET** `https://geld-machen-x402.fly.dev/product/url-fingerprint.json?url=https://example.com` → expect **HTTP 402** + `PAYMENT-REQUIRED`
2. Pay **$0.01 USDC** on Base (`eip155:8453`) to `0x524Bf56B92400BD232BF85348660B652e0DdDb2a`
3. Retry same GET with `PAYMENT-SIGNATURE` → **HTTP 200** fingerprint JSON

### Parallel demand-matched tip (SERP)

1. Free discovery (HTTP 200, schema only): `https://geld-machen-x402.fly.dev/product/web-search`
2. **GET** `https://geld-machen-x402.fly.dev/product/web-search.json?q=x402+micropayments&n=5` → **HTTP 402** (amount=20000 / $0.02)
3. Pay **$0.02 USDC** Base → retry with `PAYMENT-SIGNATURE` → ranked `[{title,url,snippet,score?}]`

Optional proof only (no live hash / no live SERP):
- Fingerprint teaser: `https://geld-machen-x402.fly.dev/product/url-fingerprint/teaser.json`
- Web-search teaser: `https://geld-machen-x402.fly.dev/product/web-search/teaser.json`

## Ladder

1. **ENTRY $0.01** — URL Fingerprint — **TIP-OF-SPEAR** — `https://geld-machen-x402.fly.dev/product/url-fingerprint.json`
2. **LANE-A SERP $0.02** — Web Search (**q= required**) — `https://geld-machen-x402.fly.dev/product/web-search.json`
3. **PARALLEL $0.025** — Agent Lead Pack — `https://geld-machen-x402.fly.dev/product/agent-lead-pack.json`
4. **LANE-A FETCH $0.02** — URL Extract — `https://geld-machen-x402.fly.dev/product/url-extract.json`
5. **PARALLEL $0.01** — Base Balance — `https://geld-machen-x402.fly.dev/product/base-balance.json`
6. **UPSELL $0.25** — Red-Flag Scan — `https://geld-machen-x402.fly.dev/product/red-flag-scan.json`
7. **UPSELL $0.35** — Offer Score — `https://geld-machen-x402.fly.dev/product/offer-score.json`
8. **UPSELL $0.49** — Prompt Pack — `https://geld-machen-x402.fly.dev/product/prompt-pack.json`
9. **UPSELL $0.75** — Deal Brief — `https://geld-machen-x402.fly.dev/product/deal-brief.json`
10. **PRIMARY $17** — Side Income PDF — `https://geld-machen-x402.fly.dev/product/side-income.pdf`

## Discovery (free)

- `https://geld-machen-x402.fly.dev/catalog.json`
- `https://geld-machen-x402.fly.dev/agent-buy.json`
- `https://geld-machen-x402.fly.dev/how-agents-pay.json`
- `https://geld-machen-x402.fly.dev/.well-known/x402`
- `https://geld-machen-x402.fly.dev/product/web-search` ← web-search schema + buy (no results)

Live base: `https://geld-machen-x402.fly.dev`

## Sample curls

```bash
# TIP-OF-SPEAR — unpaid → 402
curl -si "https://geld-machen-x402.fly.dev/product/url-fingerprint.json?url=https://example.com" | head -n 40

# DEMAND-MATCHED SERP — free discovery hint (200, no results)
curl -sS https://geld-machen-x402.fly.dev/product/web-search

# DEMAND-MATCHED SERP — unpaid → 402 (q= required, $0.02)
curl -si "https://geld-machen-x402.fly.dev/product/web-search.json?q=x402+micropayments&n=5" | head -n 40

# Free teasers
curl -sS https://geld-machen-x402.fly.dev/product/url-fingerprint/teaser.json
curl -sS https://geld-machen-x402.fly.dev/product/web-search/teaser.json
```

No human captcha. No Gumroad. No API key.