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Token Metadata & Risk Inspector (Base/ETH)
x402
Token Metadata & Risk Inspector (Base/ETH) is a paid API for AI agents from kr-x402-mvp.kgy5612.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-31).
Returns on-chain metadata for an ERC20 or contract address on Base or Ethereum, including token info, proxy type, ownership flags, and security risk signals.
Price / call$0.002
Success—
StatusUnknown
How this service works
Pay-per-call crypto microdata for trading/onchain AI agents via x402 (USDC on Base): Base gas, token risk, balances, multi-venue prices, Hyperliquid book/funding, kimchi premium. No API keys.
Output
A JSON object containing the token kind (e.g. ERC20), token name, symbol, decimals, total supply, chain and chain ID, proxy details (type, admin, implementation address), owner address, security flags (e.g. upgradeable_proxy, has_owner, admin_can_change_logic), interface support (ERC165/721/1155), native balance, code size in bytes, whether owner is renounced, and suggested next endpoint calls.
Example use cases
Vet unfamiliar token before trading
“Before I swap into this token at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base, can you check its metadata — is it a proxy contract, who owns it, and are there any admin risk flags I should know about?”
Identify unknown contract address
“I just received tokens from contract 0x4200000000000000000000000000000000000006 on Base — what token is this, what are its decimals, and is it a standard ERC20 or something else?”
Security audit of ETH mainnet token
“Can you pull the full on-chain metadata for the contract at 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Ethereum mainnet and flag any upgradeability or ownership risks?”
Technical details
Endpoint
GEThttps://kr-x402-mvp.kgy5612.workers.dev/v1/token-metadata?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent needs to classify, risk-score, or inspect a specific smart contract address before interacting with it — especially for ERC20 tokens on Base or Ethereum mainnet. Prefer this over generic block explorers when you need machine-readable, structured output about proxy architecture, ownership, and security flags without API keys, paying only per call via USDC on Base.
Side effects
- Invalid address format (not a 0x + 40 hex chars) returns validation error
- Address is an EOA (externally owned account), not a contract — is_contract may be false
- Unsupported chain value returns error
- Contract exists but has no token interface — token fields may be null
- Network timeout or RPC unavailability causes 5xx
- Payment failure via x402 if insufficient USDC balance on Base
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"kind": "ERC20",
"next": [
"/crypto/token-risk?address=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"/crypto/allowance?owner=&spender="
],
"safe": null,
"chain": "base",
"flags": [
"upgradeable_proxy",
"has_owner",
"admin_can_change_logic"
],
"owner": "0x...",
"proxy": {
"type": "ZEPPELINOS_LEGACY",
"admin": "0x4fc7850364958d97b4d3f5a08f79db2493f8ca44",
"beacon": null,
"is_proxy": true,
"implementation": "0x2ce6311ddae708829bc0784c967b7d77d19fd779"
},
"token": {
"name": "USD Coin",
"symbol": "USDC",
"decimals": 6,
"total_supply": 4100000000
},
"address": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"summary": "ERC20 USDC behind ZEPPELINOS_LEGACY proxy, has owner",
"chain_id": 8453,
"checked_at": "2026-10-30T03:40:00Z",
"interfaces": {
"erc165": false,
"erc721": false,
"erc1155": false
},
"is_contract": true,
"native_balance": 0,
"code_size_bytes": 1852,
"owner_renounced": false
}
}Tags
x402
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