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Aether Base Contract Onchain Data Lookup
x402
Aether Base Contract Onchain Data Lookup is a paid API for AI agents from aether-x402.vercel.app, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-12).
Fetches onchain metadata and risk signals for a contract address on Base, including proxy details, code size, ERC standards, and x402 payability audit results.
Price / call$0.003
Success—
StatusUnknown
How this service works
Pay-per-call Base onchain data, token risk verdicts and x402 payability audits over x402 (USDC on Base).
Output
A JSON object containing: proxy details (implementation address if applicable), codeBytes (size of contract bytecode), standards array (e.g. ['erc20']), and isContract boolean. May also include token risk verdict and x402 payability audit flags depending on the endpoint variant.
Example use cases
Token risk check before DeFi trade
“Before I swap into this token at 0x4200000000000000000000000000000000000006 on Base, can you check if it's a legitimate ERC20 contract and whether there are any risk flags I should know about?”
Proxy contract implementation audit
“I need to know if the contract at 0x2Ae3F1Ec7F1F5012CFEab0185bfc7aa3cf0DEc22 on Base is a proxy — if so, what's the actual implementation address behind it?”
x402 payability verification for agent integration
“Can you audit whether the contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base is x402-payable, so I know if my agent can use it for micropayments?”
Technical details
Endpoint
POSThttps://aether-x402.vercel.app/v1/base/contract?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need onchain ground-truth data about a specific Base network contract address — especially for token risk assessment, proxy detection, ERC standard identification, or verifying x402 payability. It is purpose-built for Base and pays per call via USDC over x402, making it suitable for agent-native workflows without API key management.
Side effects
- Invalid address format (not a valid 0x hex address) returns validation error
- Address is an EOA (not a contract) — isContract returns false with no further data
- Contract not deployed on Base network — returns empty or error response
- Network or RPC issues causing timeouts
- Payment failure via x402 if USDC balance is insufficient
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| address | string |
Output
Schema · Response
{
"type": "json",
"example": {
"proxy": {
"implementation": "0x..."
},
"codeBytes": 1234,
"standards": [
"erc20"
],
"isContract": true
}
}Tags
x402
Reviews
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