Endpoint · evidencePOSTmarkt.halowerk.com/cross-exchange

Queries Binance, Coinbase, Kraken, OKX and Bybit in parallel for one BASE/QUOTE pair, four seconds per exchange.

Queries Binance, Coinbase, Kraken, OKX and Bybit in parallel for one BASE/QUOTE pair, four seconds per exchange. An exchange that does not answer drops out with a stated reason and the call stays valid; venues_failed lists them. oldest_age_ms is mandatory and states the age of the oldest quote that entered the comparison, because differences taken from unequal points in time are the most common error in this kind of table. With an optional size the visible book of each exchange is walked as well

UNRATEDDelisted

Overview

Grade?

UNRATED

0 of 30 paid calls toward a letter

Price

$0.003 per call

Paid calls

none yet

delivery unknown until someone pays

More info

Seller?

0x2880edff…771c4e5e

URL

https://markt.halowerk.com/cross-exchange

Seen

first 34 days ago · last 26 days ago

29 free handshakes

Payment

Pays through

x402

Offered on?

Base USDC

Listed on?

Base

Score, from free handshakes onlyweights 2026.09.1

UN
RATED

0.588 liveness verified, no letter

To a letter · 30 paid calls

0 of 30

Held down by liveness · gap to 1.000 is 0.412: 0.169 uncertain ? + 0.243 short ? · 0.062 to C

How the composite of 0.588 is made up, part by part
Component	Weight	Measured	Lower bound ?		Adds	Short ?	Uncertain ?
livenesscosts the most it answered at all	0.60	0.69	0.414		0.248	−0.185	−0.167
latency p95 it answered as fast as its class	0.20	0.71	0.699		0.140	−0.058	−0.002
price stability the price stayed where it was listed	0.20	1.00	1.000		0.200	0	0
Composite	1.00		0.588	gap to 1.000 = 0.412 · 0.243 short · 0.169 uncertain	0.588	−0.243	−0.169

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

The multiplication, written out

  0.600 × 0.414   liveness       
+ 0.200 × 0.699   latency p95    
+ 0.200 × 1.000   price stability
= 0.588           → UNRATED: 28 of 30 paid calls      weights 2026.09.1 · 28 samples · seed cap_01M1A5Q98DFP8JHXW8W66XFBSY|2026-08-15T21:06:38.212Z|2026.09.1

Verify it yourselfnpx teppi-check https://markt.halowerk.com/cross-exchangecurl -s https://api.teppi.xyz/v1/trust/cap_01M1A5Q98DFP8JHXW8W66XFBSY