Endpoint · extractionPOSTnostr.halowerk.com/zap-receipt-check

Takes a kind 9735 receipt directly or fetches it from relays by event id, then runs eight named checks and reports each one separately with its reason.

Takes a kind 9735 receipt directly or fetches it from relays by event id, then runs eight named checks and reports each one separately with its reason. The receipt signature and the signature of the zap request enclosed in the description tag are verified per BIP-340. The invoice is decoded and its amount is compared against the amount tag of the zap request, since those two can disagree and only the invoice was payable.

UNRATEDDelisted

Overview

Grade?

UNRATED

0 of 30 paid calls toward a letter

Price

$0.002 per call

Paid calls

none yet

delivery unknown until someone pays

More info

Seller?

0x2880edff…771c4e5e

URL

https://nostr.halowerk.com/zap-receipt-check

Seen

first 35 days ago · last 22 days ago

37 free handshakes

Payment

Pays through

x402

Offered on?

Base USDC

Listed on?

Base

Score, from free handshakes onlyweights 2026.09.2

UN
RATED

0.400 liveness verified, no letter

To a letter · 30 paid calls

0 of 30

Held down by liveness · gap to 1.000 is 0.600: 0.088 uncertain ? + 0.512 short ? · 0.050 to D

How the composite of 0.400 is made up, part by part
Component	Weight	Measured	Lower bound ?		Adds	Short ?	Uncertain ?
livenesscosts the most it answered at all	0.60	0.30	0.164		0.098	−0.419	−0.082
latency p95 it answered as fast as its class	0.20	0.54	0.508		0.102	−0.092	−0.006
price stability the price stayed where it was listed	0.20	1.00	1.000		0.200	0	0
Composite	1.00		0.400	gap to 1.000 = 0.600 · 0.512 short · 0.088 uncertain	0.400	−0.512	−0.088

Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check

The multiplication, written out

  0.600 × 0.164   liveness       
+ 0.200 × 0.508   latency p95    
+ 0.200 × 1.000   price stability
= 0.400           → UNRATED: 35 of 30 paid calls      weights 2026.09.2 · 35 samples · seed cap_01M1A5QEBCYCTWND92Z7J0P852|2026-08-19T09:54:29.462Z|2026.09.2

Verify it yourselfnpx teppi-check https://nostr.halowerk.com/zap-receipt-checkcurl -s https://api.teppi.xyz/v1/trust/cap_01M1A5QEBCYCTWND92Z7J0P852