coinflip

Flip a coin for a small USDC payment on Base mainnet.

Flip a coin for a small USDC payment on Base mainnet. Returns heads or tails.

UNRATEDListed

Overview

Grade?

UNRATED

2 of 30 paid calls toward a letter

Price

$0.001 per call

Paid calls

1 delivered · 1 no answer

More info

Seller?

0xb8c578e0…763cd67f

URL

https://coinflip402.vercel.app/api/coinflip

Seen

first 35 days ago · last 18 hr ago

79 free handshakes

Payment

Pays through

x402

Offered on?

Base USDC

Listed on?

Base

Scoreweights 2026.09.6

UN
RATED

0.200 delivery verified, no letter

To a letter · 30 paid calls

2 of 30

Held back by sample size, not by the seller · gap to 1.000 is 0.800: 0.650 uncertain ? + 0.150 short ? · 0.250 to D

How the composite of 0.200 is made up, part by part
Component	Weight	Measured	Lower bound ?		Adds	Short ?	Uncertain ?
honestycosts the most it charged what it advertised	0.50	1.00	0.000		0.000	0	−0.500
liveness it answered at all	0.30	0.50	0.000		0.000	−0.150	−0.150
latency p95 it answered as fast as its class	0.10	1.00	1.000		0.100	0	0
price stability the price stayed where it was listed	0.10	1.00	1.000		0.100	0	0
Composite	1.00		0.200	gap to 1.000 = 0.800 · 0.150 short · 0.650 uncertain	0.200	−0.150	−0.650

Not measured: correctness · no paid call was checked against a task; schema conformance · no output schema published

The multiplication, written out

  0.500 × 0.000   honesty        
+ 0.300 × 0.000   liveness       
+ 0.100 × 1.000   latency p95    
+ 0.100 × 1.000   price stability
= 0.200           → UNRATED: 2 of 30 paid calls      weights 2026.09.6 · 2 samples · seed cap_01M1A51MK3GT9M5SQFPT680MQN|2026-07-05T09:39:23.693Z|2026.09.6

Verify it yourselfnpx teppi-check https://coinflip402.vercel.app/api/coinflipcurl -s https://api.teppi.xyz/v1/trust/cap_01M1A51MK3GT9M5SQFPT680MQN