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Base Token Check
x402
Base Token Check is a paid API for AI agents from tokencheck.yukikawata.fyi, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).
Returns a 0-100 safety score and plain-language due-diligence report for any ERC-20 token on the Base blockchain, covering contract verification, owner privileges, liquidity, and holder concentration.
Price / call$0.01
Success—
StatusUnknown
How this service works
Due-diligence report for an ERC-20 token on Base: contract verification, upgradeability, owner powers (mint, pause, blocklist, fees), DEX liquidity, pool age and holder concentration, with a 0-100 score and a plain-language summary.
Output
A JSON object containing the chain name, token contract address, a numeric safety score from 0 to 100, a verdict label (e.g. 'few warning signs'), a plain-language summary sentence, and an array of risk flags each with a code, human-readable message, and severity level (e.g. low/medium/high).
Example use cases
Pre-trade token risk screening
“Before I buy this token at 0x4200000000000000000000000000000000000006 on Base, can you check if the contract is verified, whether the owner can mint or freeze tokens, and give me an overall safety score?”
DeFi liquidity and holder concentration audit
“I'm looking at adding liquidity to a Base token pool — can you pull a due-diligence report on 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 and flag any concerns about holder concentration or pool age?”
Smart contract backdoor investigation
“Someone sent me a link to a new token on Base at 0xd9aAEc86B65D86f6A7B5B1b0c42FFA531710b6CA — can you check if the contract is upgradeable, has blocklist powers, or any other red flags, and summarize the risks in plain English?”
Technical details
Endpoint
GEThttps://tokencheck.yukikawata.fyi/v1/base/tokens/%7Baddress%7D?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, structured risk assessment of an ERC-20 token specifically deployed on the Base blockchain. It is purpose-built for Base and returns a single opinionated score plus categorized flags, making it ideal for pre-trade screening, automated portfolio monitoring, or user-facing risk summaries — especially when you need plain-language output without building your own on-chain analysis pipeline.
Side effects
- Invalid or malformed contract address returns an error response
- Address is valid Ethereum format but not a token on Base — may return empty or error
- Token contract not yet indexed or very new — liquidity/pool data may be absent
- Network or upstream data provider outage causes timeout
- Payment of $0.01 USDC not processed correctly, returning 402 status
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"chain": "base",
"flags": [
{
"code": "can_mint",
"message": "New tokens can be minted.",
"severity": "medium"
}
],
"score": 90,
"address": "0x940181a94A35A4569E4529A3CDfB74e38FD98631",
"summary": "AERO on Base shows few warning signs. New tokens can be minted. The owner is not active, but another role may hold this power.",
"verdict": "few warning signs"
}
}Tags
x402
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