Endpoint · computeGET402.com.tr /api/x402/b20-authenticity ?address=0xb20000000000000000000186a08e781c38059eec
🆕 Run FIRST on any 'B20'.
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🆕 Run FIRST on any 'B20'. A scammer can deploy a normal contract at a vanity 0xB200… address and fake the whole B20 read surface — the B20Factory precompile is the one authority that can't be spoofed. Verifies factory registration + bytecode absence (real B20s are chain-native precompiles with no code). verdict: genuine / fake_lookalike / not_b20. The 2-cent check that keeps every other B20 answer honest.Overview
Grade?
UNRATED
0 of 30 paid calls toward a letter
Price
$0.02 per call
Paid calls
none yet
delivery unknown until someone pays
More info
Seller?
URL
https://402.com.tr/api/x402/b20-authenticity?address=0xb20000000000000000000186a08e781c38059eec
Seen
first 35 days ago · last 17 hr ago
64 free handshakes
Payment
Pays through
x402
Offered on?
Base USDC
Listed on?
Base
Score, from free handshakes onlyweights 2026.09.6
UN
RATED
RATED
0.734 liveness verified, no letter
To a letter · 30 paid calls
0 of 30
Held down by latency p95 · gap to 1.000 is 0.266: 0.066 uncertain ? + 0.200 short ? · 0.066 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 | 0.890 | 0.534 | 0 | −0.066 | |
| price stability the price stayed where it was listed |
0.20 | 1.00 | 1.000 | 0.200 | 0 | 0 | |
| Composite | 1.00 | 0.734 | gap to 1.000 = 0.266 · 0.200 short · 0.066 uncertain | 0.734 | −0.200 | −0.066 |
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 × 0.890 liveness
+ 0.200 × 1.000 price stability
= 0.734 → UNRATED: 56 of 30 paid calls weights 2026.09.6 · 56 samples · seed cap_01M1A59YN1NCPJBQRD9WFQX4QX|2026-09-03T20:40:32.752Z|2026.09.6
Verify it yourself
npx teppi-check https://402.com.tr/api/x402/b20-authenticity?address=0xb20000000000000000000186a08e781c38059eeccurl -s https://api.teppi.xyz/v1/trust/cap_01M1A59YN1NCPJBQRD9WFQX4QX