preflight

Explain and preflight an unsigned Base transaction, EIP-712 typed data, or an EIP-3009 x402 payment authorization before you sign it.

Explain and preflight an unsigned Base transaction, EIP-712 typed data, or an EIP-3009 x402 payment authorization before you sign it. Decodes intent against verified ABIs, resolves proxies, classifies approvals, and checks a payment authorization against the quote it claims to pay: recipient, amount, asset, chain, freshness, and nonce replay. Returns unknown rather than guessing when a selector is ambiguous. Not a guarantee that a transaction is safe or profitable.

UNRATEDListed

Overview

Grade?

UNRATED

0 of 30 paid calls toward a letter

Price

$0.01 per call

Paid calls

none yet

delivery unknown until someone pays

More info

Seller?

0x9876af0f…01612690

URL

https://txguard.schemasure.com/v1/tx/preflight

Seen

first 34 days ago · last 9 hr ago

79 free handshakes

Payment

Pays through

x402

Offered on?

Base USDC

Listed on?

Base

Score, from free handshakes onlyweights 2026.09.6

UN
RATED

0.748 liveness verified, no letter

To a letter · 30 paid calls

0 of 30

Held down by latency p95 · gap to 1.000 is 0.252: 0.052 uncertain ? + 0.200 short ? · 0.052 to B

How the composite of 0.748 is made up, part by part
Component	Weight	Measured	Lower bound ?		Adds	Short ?	Uncertain ?
latency p95costs the most it answered as fast as its class	0.20	0.00	0.000		0.000	−0.200	0
liveness it answered at all	0.60	1.00	0.913		0.548	0	−0.052
price stability the price stayed where it was listed	0.20	1.00	1.000		0.200	0	0
Composite	1.00		0.748	gap to 1.000 = 0.252 · 0.200 short · 0.052 uncertain	0.748	−0.200	−0.052

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

The multiplication, written out

  0.200 × 0.000   latency p95    
+ 0.600 × 0.913   liveness       
+ 0.200 × 1.000   price stability
= 0.748           → UNRATED: 71 of 30 paid calls      weights 2026.09.6 · 71 samples · seed cap_01M1A59NEY5H2GV6R7T9NRNMBG|2026-09-03T06:00:39.150Z|2026.09.6

Verify it yourselfnpx teppi-check https://txguard.schemasure.com/v1/tx/preflightcurl -s https://api.teppi.xyz/v1/trust/cap_01M1A59NEY5H2GV6R7T9NRNMBG