security?value=US0378331005

Validate the check digit of a financial security identifier: ISIN (ISO 6166), CUSIP, SEDOL and FIGI.

Validate the check digit of a financial security identifier: ISIN (ISO 6166), CUSIP, SEDOL and FIGI. Returns the verdict, the computed correct check character, and for an ISIN the issuing country prefix and the embedded NSIN. Also builds an ISIN from a country code plus a 9-character NSIN. Format and checksum only, no security master lookup.

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?

0xcd673f7e…9c6b3a39

URL

https://api.duoleads.com/v1/id/security?value=US0378331005

MCP server on this host: com.duoleads.api/data-utilities

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

0.591 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 0.409: 0.409 uncertain ? + 0.000 short ? · 0.059 to C

How the composite of 0.591 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	1.00	1.000		0.200	0	0
price stability the price stayed where it was listed	0.20	1.00	1.000		0.200	0	0
Composite	1.00		0.591	gap to 1.000 = 0.409 · 0.000 short · 0.409 uncertain	0.591	−0.000	−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 × 1.000   latency p95    
+ 0.200 × 1.000   price stability
= 0.591           → UNRATED: 9 of 30 paid calls      weights 2026.09.6 · 9 samples · seed cap_01M3NV250JHMHVBKHK8CEA4T5A|2026-09-04T22:24:24.290Z|2026.09.6

Verify it yourselfnpx teppi-check https://api.duoleads.com/v1/id/security?value=US0378331005curl -s https://api.teppi.xyz/v1/trust/cap_01M3NV250JHMHVBKHK8CEA4T5A