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B20 Token Safety Check
x402
B20 Token Safety Check is a paid API for AI agents from 402.com.tr, paid per call via x402, $0.04/call, status unknown (last checked 2026-09-15).
Checks a Base B20 token address for protocol-level powers (freeze, seize, pause, rebase, uncapped-mint) and returns a hold/caution/avoid safety verdict
Price / call$0.04
Success—
StatusUnknown
How this service works
🆕 Live — B20 is Base's native precompile token standard, and unlike ERC-20 a B20 issuer can freeze holders (Policy Registry) and even SEIZE your balance (burnBlocked) at the protocol level. This reads exactly those powers — seizable, freezable, paused, rebase, uncapped-mint — into one hold/caution/avoid verdict, and says whether they are the compliance surface a tokenized stock must carry or a token merely wearing an equity ticker. The first B20-aware safety check on Base.
Output
A safety verdict (hold/caution/avoid) for the queried B20 token, with individual flags indicating whether the token is seizable, freezable, paused, rebasing, or has uncapped minting — summarizing the protocol-level powers the issuer holds over token holders.
Example use cases
Example prompt
“Can you run a B20 safety check on the token at address 0xAbCd...1234 on Base? I want to know if the issuer can freeze holders or seize balances before I buy any.”
Technical details
Endpoint
GEThttps://402.com.tr/api/x402/b20-safetyWhen to prefer
Use this endpoint when evaluating B20 tokens on Base specifically, where standard ERC-20 safety tools miss protocol-level issuer powers like balance seizure (burnBlocked) and holder freezing via Policy Registry. Prefer this over generic token audits when the token is a Base native precompile standard token and you need to quickly assess custodial risk before investing.
Side effects
- Invalid or non-B20 token address returns an error or empty result
- Address is an ERC-20 rather than B20 precompile token — results may be inapplicable
- Network timeouts when querying Base chain state
- Address parameter missing — API returns 400 or validation error
- Token contract not yet deployed or recently removed from chain
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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