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Mach Gallery Base Contract Info
x402
Mach Gallery Base Contract Info is a paid API for AI agents from api.mach.gallery, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-02).
Returns on-chain metadata for any EVM contract address on Base, including token type, name, symbol, decimals, bytecode size, and total supply.
Price / call$0.005
Success—
StatusUnknown
How this service works
Fast, low-cost Base data for autonomous agents. No API keys, no subscriptions; pay per call with USDC over x402.
Output
A JSON object containing: contract name (or null), token symbol (or null), network identifier (eip155:8453), decimals (or null), boolean flags for ERC-721 and ERC-1155 token standards, a boolean confirming whether the address is a contract, bytecode size in bytes, and total supply in atomic units (or null if unavailable).
Example use cases
Token metadata enrichment pipeline
“I have a Base contract address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 — can you pull its name, symbol, and decimals so I can display it correctly in my dashboard?”
NFT contract type verification
“Can you check whether 0x03c4738Ee98aE44591e1A4A4F3CaB6641d95DD9a on Base is an ERC-721 or ERC-1155 NFT contract?”
Unknown address classification
“I got this address from a transaction on Base — 0x4200000000000000000000000000000000000006 — can you tell me if it's actually a smart contract and how big its bytecode is?”
Technical details
Endpoint
POSThttps://api.mach.gallery/api/base/contract-info?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need lightweight, structured on-chain metadata about a specific Base contract address without setting up API keys or subscriptions. It is ideal for AI agents that need to classify contract types (ERC-20, ERC-721, ERC-1155, or plain contract), enrich token data, or verify that an address is a deployed contract — all with pay-per-call USDC pricing via x402. Prefer this over Etherscan or Alchemy when operating on Base specifically and when per-call micropayment billing is preferred over monthly subscriptions.
Side effects
- Invalid address format (not a 40-hex-character 0x address) — request rejected with validation error
- Address is an EOA (externally owned account) not a contract — is_contract returns false, most fields null
- Contract does not expose standard ERC-20/721/1155 interfaces — name, symbol, decimals, total_supply_atomic all null
- Network unavailability or Base RPC errors — upstream timeout or error response
- Insufficient USDC balance for x402 payment — payment fails before request is processed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| address | string | Wallet or account address on Base mainnet. |
Output
Schema · Response
{
"type": "json",
"example": {
"name": null,
"symbol": null,
"network": "eip155:8453",
"decimals": null,
"is_erc721": false,
"is_erc1155": false,
"is_contract": true,
"bytecode_bytes": 1000,
"total_supply_atomic": null
}
}Tags
x402
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