SERV Hackathon 02

Fiangshi — for judges

Open Track. Three commands, ninety seconds, no key required.

The claim

Every guard asks how much an agent may spend.
None asks who receives it.
Fiangshi asks that first, and blocks a dead-end wallet before any data or model call.

Try it

aA dead-end wallet, blocked for free
```
curl -s "https://api.fiangshi.xyz/v1/preview?url=https://api.cleave.fi/x402/gas"
```
expect"verdict": "BLOCK""vow_fired": "null_payee""price_usd": 0.8"pay_to": "0x0000000000000000000000000000000000000000""cost_usd": 0

bA real seller, allowed

curl -s "https://api.fiangshi.xyz/v1/preview?url=https://api.bitrefill.com/x402/gift-cards/search"

expect"verdict": "ALLOW""score": 90.59

cThe paid check asks for payment first
```
curl -si "https://api.fiangshi.xyz/v1/check?url=https://api.bitrefill.com/x402/gift-cards/search"
```
expectHTTP/1.1 402 Payment Required"x402Version": 2"amount": "50000""network": "eip155:8453"

What else to look at

The census1,923 records: band, score, vows fired, receipt id
One receiptapi.bitrefill.com/x402/gift-cards/search, sealed and verifiable
Architecturethe eight steps, live
Guidereal endpoints to try, one check walked through
The write-upSUBMISSION.md on GitHub

What this is not

Settlement is dry-run: no funds move. It covers Base only, over a 90-day window, from a single data provider. It does not claim a false-block rate: the rate is published as a bound, not a point estimate, in the write-up.

github.com/Aceop-001/fiangshi · fiangshi.xyz