Endpoint · computeGET2s.io /api/validate/isin ?isin=US0378331005
Validate an ISIN (International Securities Identification Number, ISO 6166): 2-letter country prefix + 9-char NSIN + Luhn check digit.
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Validate an ISIN (International Securities Identification Number, ISO 6166): 2-letter country prefix + 9-char NSIN + Luhn check digit. Returns {valid, isin, country, nsin, embeddedCusip (for US/CA), checkDigit, reason}. Catches transposed characters in security master data that a regex misses. Structure + checksum only.Overview
Grade?
UNRATED
0 of 30 paid calls toward a letter
Price
$0.0025 per call
Paid calls
none yet
delivery unknown until someone pays
More info
Seller?
URL
https://2s.io/api/validate/isin?isin=US0378331005
Seen
first 16 days ago · last 4 days ago
29 free handshakes
Payment
Pays through
x402
Offered on?
Base USDC, Solana
Listed on?
Base, Solana
Score, from free handshakes onlyweights 2026.09.6
UN
RATED
RATED
0.658 liveness verified, no letter
To a letter · 30 paid calls
0 of 30
Held down by latency p95 · gap to 1.000 is 0.342: 0.142 uncertain ? + 0.200 short ? · 0.142 to B
| 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 | 0.764 | 0.458 | 0 | −0.142 | |
| price stability the price stayed where it was listed |
0.20 | 1.00 | 1.000 | 0.200 | 0 | 0 | |
| Composite | 1.00 | 0.658 | gap to 1.000 = 0.342 · 0.200 short · 0.142 uncertain | 0.658 | −0.200 | −0.142 |
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 × 0.764 liveness
+ 0.200 × 1.000 price stability
= 0.658 → UNRATED: 26 of 30 paid calls weights 2026.09.6 · 26 samples · seed cap_01M2SGPZJSX0D6T9128JB4NP0D|2026-09-02T11:07:00.096Z|2026.09.6
Verify it yourself
npx teppi-check https://2s.io/api/validate/isin?isin=US0378331005curl -s https://api.teppi.xyz/v1/trust/cap_01M2SGPZJSX0D6T9128JB4NP0D