attest

Witness the SHA-256 fingerprint of a literary work: submit a title, content hash, and optional pen name; receive a tamper-evident, hash-chained receipt.

Witness the SHA-256 fingerprint of a literary work: submit a title, content hash, and optional pen name; receive a tamper-evident, hash-chained receipt. Timestamping, not endorsement. We never see the work itself.

UNRATEDListed

Overview

Grade?

UNRATED

0 of 30 paid calls toward a letter

Price

$0.05 per call

Paid calls

none yet

delivery unknown until someone pays

More info

Seller?

0x19ea1e95…b964c53d

URL

https://www.pennypress.org/witness/attest

MCP server on this host: io.github.con-scribe/penny-press

Seen

first 8 days ago · last 14 hr ago

8 free handshakes

Payment

Pays through

x402 · MPP x402

Offered on?

Base USDC

Listed on?

Base

Score, from free handshakes onlyweights 2026.09.6

UN
RATED

0.274 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 0.726: 0.526 uncertain ? + 0.200 short ? · 0.176 to D

How the composite of 0.274 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	0.123		0.074	0	−0.526
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		0.274	gap to 1.000 = 0.726 · 0.200 short · 0.526 uncertain	0.274	−0.200	−0.526

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

The multiplication, written out

  0.600 × 0.123   liveness       
+ 0.200 × 0.000   latency p95    
+ 0.200 × 1.000   price stability
= 0.274           → UNRATED: 7 of 30 paid calls      weights 2026.09.6 · 7 samples · seed cap_01M4Z1JX47C1X0KCPRJKHVVFQE|2026-09-22T00:45:44.623Z|2026.09.6

Verify it yourselfnpx teppi-check https://www.pennypress.org/witness/attestcurl -s https://api.teppi.xyz/v1/trust/cap_01M4Z1JX47C1X0KCPRJKHVVFQE