MACH Base

Endpoints (32 live)

• POST /api/base/transaction-context — Verify an onchain payment or investigate a failed Base transaction in one call with transaction, receipt, success status, confirmations, gas and fee context. (0.008 USDC on Base)
• GET /api/base/block-number — Get the current Base mainnet block number (latest chain height) for an autonomous agent. (0.005 USDC on Base)
• POST /api/base/logs — Query smart-contract event logs on Base by contract address, topics and bounded block range. (0.005 USDC on Base)
• POST /api/base/block — Get a Base block by number or tag with its header and transaction hashes. (0.005 USDC on Base)
• POST /api/base/erc20-balance — Check a USDC or other ERC-20 token balance for a wallet on Base mainnet. (0.005 USDC on Base)
• POST /api/base/transaction — Get a full Base transaction by hash, including sender, recipient, value, calldata and live transaction details. (0.008 USDC on Base)
• POST /api/base/wallet-balance — Check the native ETH balance of a wallet or address on Base mainnet. (0.005 USDC on Base)
• POST /api/base/receipt — Check whether a Base transaction succeeded, get its receipt, and count current confirmations. (0.005 USDC on Base)
• POST /api/base/contract-info — Inspect a Base smart contract and get token metadata, bytecode size and common interface detection in one call. (0.005 USDC on Base)
• POST /api/base/eth-call — Make a read-only smart-contract call on Base with eth_call without sending a transaction. (0.005 USDC on Base)
• POST /api/base/erc20-transfers — Find recent ERC-20 transfers on Base, optionally filtered to transfers from or to a specific wallet. (0.005 USDC on Base)
• POST /api/base/total-supply — Get total supply for an ERC-20 token or ERC-721 NFT contract on Base. (0.005 USDC on Base)
• POST /api/base/allowance — Check an ERC-20 token allowance on Base for an owner and spender. (0.005 USDC on Base)
• POST /api/base/nonce — Get the current transaction nonce for a Base wallet before broadcasting a transaction. (0.005 USDC on Base)
• POST /api/base/contract-code — Check whether an address is a smart contract or EOA on Base mainnet by reading deployed bytecode. (0.005 USDC on Base)
• POST /api/base/wallet-snapshot — Take a Base wallet snapshot in one call: native ETH plus up to 10 supplied ERC-20 token balances. (0.005 USDC on Base)
• GET /api/base/wallet-balance (free)
• GET /api/base/transaction (free)
• GET /api/base/block (free)
• GET /api/base/eth-call (free)

+12 more endpoints.