Crypto Microdata – Chain Code Inspector (x402)

x402

Crypto Microdata – Chain Code Inspector (x402) 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 ERC20/contract metadata for a given on-chain address on Base or Ethereum: kind, proxy type, owner, flags, token info, and suggested next endpoints.

Price / call$0.002

Seller volume →—

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 with: `kind` (e.g. ERC20), `chain`, `address`, `is_contract`, `owner`, `owner_renounced`, `proxy` (type, admin, implementation, beacon, is_proxy), `flags` (array of risk strings like 'upgradeable_proxy', 'has_owner', 'admin_can_change_logic'), `token` (name, symbol, decimals, total_supply), `interfaces` (erc165/erc721/erc1155 booleans), `native_balance`, `code_size_bytes`, `summary` (human-readable one-liner), `safe` (null or safety verdict), `checked_at` (ISO timestamp), and `next` (array of suggested follow-up endpoint paths).

Example use cases

Pre-trade token contract risk check

“Before my agent swaps into this token at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base, can you check if it's a proxy contract with an upgradeable admin or any other risk flags?”

Token metadata lookup for DeFi dashboard

“Pull the name, symbol, decimals, and total supply for the contract at 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Ethereum mainnet so I can display it on my portfolio tracker.”

EOA vs contract classification

“Is the address 0x4fc7850364958d97b4d3f5a08f79db2493f8ca44 on Base actually a smart contract or just a regular wallet?”

Technical details

Endpoint

GEThttps://kr-x402-mvp.kgy5612.workers.dev/api/chain/code?utm_source=zero.xyz

When to prefer

Use this endpoint when you need a quick, structured snapshot of what a contract address actually is before interacting with it — especially for risk assessment (proxy type, admin flags, owner) and token metadata (name/symbol/decimals). Prefer it over raw RPC calls when you want pre-parsed risk flags and suggested next steps, and when you want a pay-per-call model with no API key setup. Not ideal if you need live price data (use the multi-venue price endpoint) or full audit-level security analysis.

Side effects

Invalid address format (must be 0x + 40 hex chars) → 400 error
Address is not a deployed contract → is_contract: false, limited metadata
Unsupported chain value → 400 or default to Base
Payment not received (x402 flow incomplete) → 402 Payment Required
Network timeout reading on-chain data → 5xx or partial response
Rate limiting or worker overload → 503

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
  }
}

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