# Clarity — agent buyer walkthrough (cold start)

External Base USDC payers only. Do not use the host wallet.

## What you get
Short structured research/verdict JSON from `local:qwen3:1.7b` (public synthesis only). **$2 USDC on Base** via x402. Chat is **$0.001 USDC** if you need completions.

## 60-second path
1. **Discover (free):** https://desktop-o99r0sf.tail935fba.ts.net/.well-known/x402
2. **Models (free):** https://desktop-o99r0sf.tail935fba.ts.net/v1/models
3. **Challenge:** `POST https://desktop-o99r0sf.tail935fba.ts.net/v1/x402/report` → HTTP **402** + `Payment-Required`
4. **Pay** with your Base USDC wallet / facilitator
5. **Retry** the same POST with payment proof → JSON report

Body: `{"topic":"..."}` required; optional `focus`, `max_words` (80–800, default 400).

## Unpaid smoke (expect 402)
```bash
curl -sS -i https://desktop-o99r0sf.tail935fba.ts.net/v1/x402/report \
  -H 'Content-Type: application/json' \
  -d '{"topic":"x402 agent commerce on Base","focus":"pricing and buyer discovery","max_words":400}'
```

## Links
| Kind | URL |
|------|-----|
| Buy one-pager | https://desktop-o99r0sf.tail935fba.ts.net/static/buy.md |
| Skills | https://desktop-o99r0sf.tail935fba.ts.net/skills.md |
| OpenAPI | https://desktop-o99r0sf.tail935fba.ts.net/openapi.json |
| Docs | https://desktop-o99r0sf.tail935fba.ts.net/docs |
| Report $2 | `POST /v1/x402/report` |
| Chat $0.001 | `POST /v1/x402/chat/completions` |

## Find it in indexes (live)
- 402 Index search: https://402index.io/api/v1/services?q=desktop-o99r0sf
- Report: https://402index.io/service/064c4c86-74e3-4a3e-8814-c76f403da293
- Chat: https://402index.io/service/03ccd3cc-fda5-414f-a88f-95c39c61e151
- Topup: https://402index.io/service/242a2fcb-185e-433e-9ffa-0b0e562c0d7f
- agent-tools.cloud report: https://agent-tools.cloud/services/desktop-o99r0sf-tail935fba-ts-net-sub899

## One-liner
Clarity (Base): free discovery at https://desktop-o99r0sf.tail935fba.ts.net/.well-known/x402 — paid short reports POST /v1/x402/report ($2 USDC) and chat ($0.001). External payers only.