tx-context

Call before signing a Bitcoin transaction when you need chain context for its inputs: whether each prevout exists, whether it is already spent, its value in sats and its…

Call before signing a Bitcoin transaction when you need chain context for its inputs: whether each prevout exists, whether it is already spent, its value in sats and its confirmations. Resolves up to 10 inputs against a public explorer at about one request per second, so a full batch can take over 20 seconds; figures reflect chain state at checked_at. Describes on-chain facts with source links; never advises whether to sign.

UNRATEDListed

Overview

Grade?

UNRATED

0 of 30 paid calls toward a letter

Price

$0.10 per call

Paid calls

none yet

delivery unknown until someone pays

More info

Seller?

0xb9db3966…7f9ba607

URL

https://preflight402.com/v1/btc/tx-context

Seen

first 5 days ago · last 17 hr ago

9 free handshakes

Payment

Pays through

x402

Offered on?

Base USDC

Listed on?

Base

Score, from free handshakes onlyweights 2026.09.6

UN
RATED

0.391 liveness verified, no letter

To a letter · 30 paid calls

0 of 30

Held back by sample size, not by the seller · gap to 1.000 is 0.609: 0.409 uncertain ? + 0.200 short ? · 0.059 to D

How the composite of 0.391 is made up, part by part
Component	Weight	Measured	Lower bound ?		Adds	Short ?	Uncertain ?
livenesscosts the most it answered at all	0.60	1.00	0.318		0.191	0	−0.409
latency p95 it answered as fast as its class	0.20	0.00	0.000		0.000	−0.200	0
price stability the price stayed where it was listed	0.20	1.00	1.000		0.200	0	0
Composite	1.00		0.391	gap to 1.000 = 0.609 · 0.200 short · 0.409 uncertain	0.391	−0.200	−0.409

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

The multiplication, written out

  0.600 × 0.318   liveness       
+ 0.200 × 0.000   latency p95    
+ 0.200 × 1.000   price stability
= 0.391           → UNRATED: 9 of 30 paid calls      weights 2026.09.6 · 9 samples · seed cap_01M3NV2786R1XNQBTEW9DY8RAN|2026-09-04T22:55:58.317Z|2026.09.6

Verify it yourselfnpx teppi-check https://preflight402.com/v1/btc/tx-contextcurl -s https://api.teppi.xyz/v1/trust/cap_01M3NV2786R1XNQBTEW9DY8RAN