base-pending-block x402 REST usage
The current pending Base mainnet block (mempool, not yet mined) - unconfirmed transactions via eth_getBlockByNumber('pending').
0.01 USDC per call
per call
Base Rpc
28 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.
base-tx x402 REST usage
Base transaction lookup by hash - sender, recipient, value, calldata, gas and block, live from Base mainnet via eth_getTransactionByHash.
0.008 USDC per call
per call
base-nft-metadata x402 REST usage
NFT metadata URI for an ERC721 token on Base mainnet via tokenURI - the on-chain pointer (IPFS, HTTP, or data URI), not a fetch of the document itself.
0.008 USDC per call
per call
base-nft-holdings x402 REST usage
NFT holdings for a wallet in one Base ERC721 collection, owned token IDs via ERC721Enumerable (tokenOfOwnerByIndex) - up to 20 tokens, requires the collection to implement Enumerable.
0.008 USDC per call
per call
base-simulate x402 REST checked
Simulate a Base mainnet transaction before sending it - will it succeed, estimated gas, and the decoded revert reason if it would fail.
0.005 USDC per call
per call
checked
base-erc20-transfers x402 REST usage
ERC20 Transfer event logs for one token over a Base mainnet block range (max 2,000 blocks) via eth_getLogs.
0.005 USDC per call
per call
base-contract x402 REST usage
Contract introspection on Base mainnet - is it a contract, bytecode size, best-effort owner(), and whether it's a proxy.
0.005 USDC per call
per call
base-can-sell x402 REST usage
Can I sell this token? Honeypot check that simulates a real buy then a real sell of a Base mainnet token in one atomic on-chain call via Uniswap V2 - if the sell reverts, that is a honeypot, reported with the exact decod...
0.005 USDC per call
per call
base-basename x402 REST usage
Resolve a Basename, Base's native ENS-equivalent, to its wallet address via the L2 Basenames resolver.
0.005 USDC per call
per call
base-call x402 REST usage
Generic read-only eth_call against any Base mainnet contract - pass raw calldata, get the raw return data back.
0.005 USDC per call
per call
base-estimate-gas x402 REST usage
Gas estimate for a Base mainnet swap or any other call (to/from/value/data) via eth_estimateGas, without broadcasting a transaction.
0.004 USDC per call
per call
base-storage x402 REST usage
Read a contract storage slot on Base mainnet via eth_getStorageAt - the raw 32-byte value, decoded as hex and unsigned integer, zero-filled if unset.
0.005 USDC per call
per call
base-receipt x402 REST usage
Transaction receipt via eth_getTransactionReceipt - status, gas used, and event logs for a mined Base mainnet transaction.
0.005 USDC per call
per call
base-proxy x402 REST usage
Is this Base contract an upgradeable proxy? Proxy contract detection for EIP-1967 (transparent/UUPS), beacon, or EIP-1822 patterns, returning the implementation address.
0.005 USDC per call
per call
base-events x402 REST usage
Smart contract event logs on Base mainnet (Base contract events) via eth_getLogs - filter by contract address and up to 4 topics, up to 2,000 blocks, raw logs with topics, data, block and tx hash.
0.005 USDC per call
per call
base-total-supply x402 REST usage
Total supply for an ERC20 (normalized by decimals()) or ERC721 (raw count, no decimals) contract on Base mainnet.
0.003 USDC per call
per call
base-quote x402 REST usage
Slippage estimate, swap quote, and best DEX price on Base - compares Uniswap v2, Uniswap v3, and Aerodrome on-chain via Multicall3, returns amount received, chosen path, and price impact.
0.003 USDC per call
per call
base-nonce x402 REST usage
Next transaction nonce for any Base mainnet wallet via eth_getTransactionCount - how many transactions it has sent.
0.003 USDC per call
per call
base-live-balance x402 REST usage
Native ETH balance plus up to 20 ERC20 token balances for one wallet on Base mainnet, in a single Multicall3 round trip regardless of token count.
0.003 USDC per call
per call
base-erc20-balance x402 REST usage
ERC20 token balance for a wallet on Base mainnet - balanceOf() and decimals() batched into one Multicall3 round trip.
0.003 USDC per call
per call
base-erc1155-balance x402 REST usage
ERC1155 multi-token balance for a wallet and token id on Base mainnet via balanceOf(address,uint256).
0.003 USDC per call
per call
base-code x402 REST usage
Check whether a Base mainnet address is a contract via eth_getCode - returns bytecode size, zero for an externally-owned account.
0.003 USDC per call
per call
base-block x402 REST usage
Fetch a Base mainnet block header and transaction hashes by number, tag (latest/earliest/safe/finalized), or hash via eth_getBlockByNumber/eth_getBlockByHash.
0.003 USDC per call
per call
base-allowance x402 REST usage
ERC20 allowance on Base mainnet via RPC: how much a spender is approved to move from an owner balance, read with allowance(owner,spender) eth_call.
0.003 USDC per call
per call