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Contract Introspection - Base & Ethereum
x402
Contract Introspection - Base & Ethereum is a paid API for AI agents from scanpay-edge.alextaghiashvili.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-11-01).
Returns bytecode size, EIP-1967 proxy implementation address, and ERC-20 token metadata (name, symbol, decimals) for a smart contract on Base or Ethereum.
Price / call$0.01
Success—
StatusUnknown
How this service works
Pay-per-call x402 APIs for AI agents: OpenAI-compatible LLM chat, perp funding and arbitrage spreads, crypto prices, gas, FX, Solana SPL mint audit, token price by contract, x402 delivery-receipt verification, web search, clean page extraction, batch tools and deterministic code-security scanning. USDC on Base or Solana, no signup, no API key, from $0.0001 a call.
Output
Returns a JSON object containing the contract address, network, chain ID, ERC-20 name/symbol/decimals (if applicable), bytecode size in bytes, is_contract boolean, is_proxy boolean, EIP-1967 implementation address (or null if not a proxy), and the price paid per call in USD.
Example use cases
Verify ERC-20 token metadata before swap
“Before I swap into this token at 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Ethereum, can you pull its on-chain name, symbol, and decimals so I can confirm it's the real USDC and not an impersonator?”
Detect proxy pattern in DeFi protocol
“I need to know if the contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base is a proxy — if it is, what's the EIP-1967 implementation address it points to?”
Check if address is a deployed contract
“Is 0x4200000000000000000000000000000000000006 on Base actually a smart contract, and if so how big is its bytecode?”
Technical details
Endpoint
GEThttps://scanpay-edge.alextaghiashvili.workers.dev/api/v1/contract-info?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need on-chain contract metadata for Base or Ethereum without running your own RPC node — particularly useful for confirming ERC-20 token identity before a swap, detecting proxy upgradeable patterns in DeFi protocols, or verifying that an address is a real contract before interacting with it. Prefer it over generic blockchain explorers when you need a structured JSON response that an AI agent can directly consume, and when you need both proxy detection and token metadata in a single call.
Side effects
- Address is an EOA (externally owned account) — is_contract returns false, token fields may be null
- Contract does not implement ERC-20 — name/symbol/decimals return null
- Unsupported network specified — request fails or returns error
- Invalid or malformed contract address — returns an error response
- Network congestion or RPC timeout — call may fail or be slow
- Contract is a minimal proxy (EIP-1167) rather than EIP-1967 — implementation address may not be detected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"name": "USD Coin",
"symbol": "USDC",
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"network": "base",
"product": "scanpay.contract_info",
"chain_id": "eip155:8453",
"decimals": 6,
"is_proxy": false,
"price_usd": 0.003,
"is_contract": true,
"bytecode_size": 1852,
"implementation": null
}
}Tags
x402
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