useless-fact

Pay a tiny amount of USDC and receive one delightfully useless fact.

UNRATEDListed

Overview

Grade?

UNRATED

1 of 30 paid calls toward a letter

Price

$0.001 per call

Paid calls

1 delivered

More info

Seller?

0xd7d49d6a…f4e48914

URL

https://x402uselessfacts.vercel.app/api/useless-fact

Seen

first 34 days ago · last 13 hr ago

78 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

1 of 30

Held back by sample size, not by the seller · gap to 1.000 is 0.800: 0.800 uncertain ? + 0.000 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	1.00	0.000		0.000	0	−0.300
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 · 0.000 short · 0.800 uncertain	0.200	−0.000	−0.800

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: 1 of 30 paid calls      weights 2026.09.6 · 1 samples · seed cap_01M1A51MNFBA5ZC0WG1KXYM23X|2026-07-05T08:36:32.642Z|2026.09.6

Verify it yourselfnpx teppi-check https://x402uselessfacts.vercel.app/api/useless-factcurl -s https://api.teppi.xyz/v1/trust/cap_01M1A51MNFBA5ZC0WG1KXYM23X