UnFee — 1-Credit Base/ETH/XRPL RPC, x402 Trace & Wash Filter, 0% Crypto Checkout & Tax Engine

Down since Oct 26

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Flat 1-credit Base/ETH/XRPL RPC (eth_getLogs=1 credit), x402 wash filter, 0% checkout & tax CSV.

Crypto & Web3 Finance & Payments

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base_rpc_request

Execute any Base Mainnet (Chain ID 8453) JSON-RPC method (eth_call, eth_getLogs, eth_getBalance, eth_estimateGas, eth_sendRawTransaction, eth_blockNumber) at a flat 1 Request = 1 Credit (250,000 free calls/month, zero compute-unit multipliers).

apiKeystring

Optional UnFee API key (auto-provisioned if omitted)

methodstring

Base Mainnet JSON-RPC method name

paramsarray

JSON-RPC method parameters array

This tool isn't marked read-only, so it may change something on the server or in an account you connected.

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Argument	Type	Description
tier	string
amountUsd*	number	Average transaction size in USD
monthlyTxCount	number	Monthly transaction count

Argument	Type	Description
to*	string	Recipient wallet address (Base 0x..., XRPL r..., or ENS vitalik.eth)
memo	string	Optional item label or invoice memo
amount	string	Payment amount (e.g. '25.00')
currency	string	Settlement currency on Base or XRPL

Argument	Type	Description
chain	string	Target EVM chain (base or ethereum)
apiKey	string	Optional UnFee API key
topics	array	Optional indexed event topics filter array
address	string	Optional contract address filter
toBlock	string	End block tag or hex block number
fromBlock	string	Start block tag or hex block number

Argument	Type	Description
tier	string
label	string	Optional key label for telemetry

Argument	Type	Description
to	string	Destination wallet address to verify before signing
from	string	Sender wallet address
chain	string	Blockchain network
recentContacts	array	Optional list of trusted/recent counterparty addresses to guard against lookalike spoofing

Argument	Type	Description
format	string	Preferred CSV export format (default irs8949)
method	string	Cost-basis accounting method (default HIFO)
wallet	string	Primary Base (0x...) or XRPL (r...) wallet address
taxYear	string	Tax year filter (e.g. 2026, 2025, 2024, or all)
wallets	array	Optional list of connected Base and XRPL wallets for self-transfer matching

Argument	Type	Description
buyer	string	Buyer wallet address
seller	string	Seller wallet address
currency	string	Settlement currency (default USDC)
amountUsd	string	Payment amount in USD/USDC (e.g. 0.01)
upstreamBody	string	Response payload returned by upstream seller API
expectedSha256	string	Optional expected SHA-256 hex digest of payload
upstreamStatus	number	HTTP status code returned by upstream seller API

Argument	Type	Description
chain	string	Target blockchain network (base, eth, or xrpl)
address	string	Base/ETH (0x...) or XRPL (r...) wallet or x402 facilitator address to trace
transfers	array	Optional custom batch of transfers ({ from, to, amountUsd, timestamp, hash }) to classify with the 4 heuristics

Argument	Type	Description
txHash*	string	0x... Base transaction hash or XRPL tx hash
network	string
expectedAmount	string
expectedCurrency	string
expectedRecipient	string

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base_rpc_request

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base_rpc_request

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