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B20 Token Authenticity Verifier
x402
B20 Token Authenticity Verifier is a paid API for AI agents from 402.com.tr, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).
Verifies whether a given Base token address is a genuine B20 precompile or a scammer's fake lookalike by checking B20Factory registration and bytecode absence.
Price / call$0.02
Success—
StatusUnknown
How this service works
🆕 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.
Output
Returns a verdict of 'genuine', 'fake_lookalike', or 'not_b20', indicating whether the queried address is a real chain-native B20 precompile registered with the B20Factory, a spoofed contract mimicking the B20 interface, or simply not a B20 token at all.
Example use cases
Example prompt
“Can you check if the token at address 0xB200000000000000000000000000000000000001 is a genuine B20 precompile or a fake lookalike scam?”
Technical details
Endpoint
GEThttps://402.com.tr/api/x402/b20-authenticityWhen to prefer
Use this endpoint as the mandatory first step before trusting any B20 token data — especially before executing trades, approvals, or transfers involving a token at a 0xB200… vanity address. It is the only check that queries the authoritative B20Factory precompile, which cannot be spoofed, making it more reliable than reading the token's own state.
Side effects
- Missing or invalid address parameter returns an error
- Non-Base network addresses may return not_b20 or an error
- Malformed address string (non-hex, wrong length) causes request failure
- Service unavailability or payment failure blocks the check
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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