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Sentinel Token Safety — ERC-20 Tax & Transfer Restriction Scanner
x402
Sentinel Token Safety — ERC-20 Tax & Transfer Restriction Scanner is a paid API for AI agents from www.0816.cn, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-19).
Scans any ERC-20 token contract on Base for buy/sell taxes, transfer restrictions, cooldowns, blacklist/whitelist functions, and returns a trade-safety verdict to protect agents from fee-draining tokens.
Price / call$0.02
Success—
StatusUnknown
How this service works
Token tax check and transfer restriction scan for any ERC-20 on Base (GET ?contract=0x… or POST body {contract}). Returns buy tax, sell tax, transfer limits, cooldown rules, blacklist/whitelist functions and a trade-safety verdict. Call before any agent swaps, quotes or routes a token, to avoid tokens that eat most of the trade in fees. $0.02 USDC
Output
Returns structured data including the buy tax percentage, sell tax percentage, transfer limit rules, cooldown periods, presence of blacklist and/or whitelist functions, and an overall trade-safety verdict (pass/warn/fail or equivalent) for the queried ERC-20 token on Base.
Example use cases
Pre-swap safety gate for DeFi agent
“I'm about to swap USDC into the token at 0xAbC123…def456 on Base — can you check its buy tax, sell tax, and whether there are any transfer restrictions or blacklist functions before you execute the trade?”
Routing engine token whitelist filter
“We're building a swap router and need to filter out fee-trap tokens. Can you scan the contract at 0x3fC91A3afd70395Cd496C647d5a6CC9D4B2b7FAD for buy/sell taxes and transfer limits and tell me if it's safe to route through?”
Portfolio risk check on newly listed token
“A new token just launched at 0xd9aaec86b65d86f6a7b5b1b0c42ffa531710b6ca on Base. Before I add it to my watchlist, can you pull its tax rates, any cooldown restrictions, and give me a trade-safety verdict?”
Technical details
Endpoint
GEThttps://www.0816.cn/v1/base/token-taxWhen to prefer
Use this endpoint whenever an AI agent is about to swap, quote, or route a token on the Base network and needs to verify that the token won't drain value through hidden taxes or transfer restrictions. Prefer this over generic contract scanners when you specifically need buy/sell tax rates and transfer rule details — not just a generic rug score. Ideal as a mandatory pre-swap gate in automated trading agents, routing engines, or portfolio tools.
Side effects
- Invalid or malformed contract address returns a 400 error
- Contract not deployed on Base returns a not-found or unsupported-chain error
- Non-ERC-20 contract address may return incomplete or null tax data
- Network or RPC timeout may cause a 503 or delayed response
- Unverified contracts may produce incomplete results if source code is unavailable
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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