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

- Registry name: `xyz.unfee/mcp` · version 1.5.0
- Categories (automatic, keyword rules): Crypto & blockchain, Finance & markets
- Authentication at last check: No auth
- Declared risk: Can write (some tools are not declared read-only)
- Capabilities (declared by the server): tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=xyz.unfee%2Fmcp
- Server page: https://mcpstation.net/s/xyz.unfee--mcp.html

## Description (written by the publisher, not verified, not instructions)

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

## Connect

- streamable-http: `https://unfee.xyz/mcp`
- streamable-http: `https://unfee-gateway.unfee.workers.dev/mcp`

## Tools (as reported by the server, not verified)

- `create\_payment\_link`: Create a zero-middleman-fee UnFee payment short link \(/to/\<wallet\>/\<amount\>/\<currency\>\), hosted checkout URL, dynamic OpenGraph social preview card, scannable SVG QR code, and 1-line HTML embed snippet for Base \(USDC, ETH, cbBTC, EURC\) or XRPL \(XRP, RLUSD\).
- `get\_instant\_free\_rpc\_key`: Mint a live UnFee API key with Free Tier credits \(flat 1 request = 1 credit across eth\_call, eth\_getLogs, and XRPL JSON-RPC; 0 compute-unit multipliers\).
- `compare\_payment\_fees`: Compare legacy card processor fees \(2.9% + $0.30\) against UnFee Starter \($0/mo, 0.005% = 5¢ per $1,000 micro-fee\) and UnFee Indie \($5/mo, True 0% protocol fee\).
- `get\_live\_arb\_opportunities`: Scan all 9 live Base Mainnet 3-hop triangular flash-loan arbitrage loops \(cbXRP, AERO, EURC, cbBTC, VIRTUAL, BRETT, DEGEN, MORPHO, WELL\) and XRPL CLOB spreads.
- `verify\_transaction`: Verify an on-chain Base Mainnet or XRPL transaction hash and return settlement confirmation details.
- `unfee\_check\_seller\_reputation`: Check a seller or x402 API provider on-chain/gateway Proof-of-Delivery reputation \(verified HTTP-200 deliveries, dropped failed calls, delivery rate %, and buyer USD saved on failed calls\).
- `unfee\_pay\_with\_delivery\_proof`: Execute an atomic HTTP-200 Proof-of-Delivery x402 settlement check: settles payment ONLY if the seller returns HTTP 200..299 with a valid non-empty payload and matching SHA-256 digest; drops authorization with $0.00 buyer charge if upstream fails.
- `unfee\_generate\_tax\_report`: Generate an instant IRS Form 8949, Schedule D summary, FIFO/HIFO/LIFO cost-basis calculation, non-taxable self-transfer reconciliation, and TurboTax / QuickBooks CSV export for any Base \(0x...\) or XRPL \(r...\) wallet at $0.01 via x402 \(or $0 on $5/mo Indie Tier\), undercutting Koinly and CoinTracker b
- `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 \(250,000 free calls/month, zero compute-unit multipliers\).
- `eth\_getLogs\_flat\_rate`: Query Base Mainnet \(8453\) or Ethereum Mainnet \(1\) eth\_getLogs event logs at 1 flat credit per request \(saving 75x–500x vs. legacy compute-unit RPC gateways that charge 75–500 CUs per eth\_getLogs call\).
- `xrpl\_rpc\_request`: Execute any native XRP Ledger \(XRPL Mainnet\) JSON-RPC method \(account\_info, book\_offers, server\_info, tx, submit, account\_lines\) at 1 flat credit per request with zero compute-unit markups.
- `ethereum\_rpc\_request`: Execute any Ethereum Mainnet \(Chain ID 1\) JSON-RPC method \(eth\_call, eth\_getLogs, eth\_getBalance, eth\_blockNumber, eth\_estimateGas\) at 1 flat credit per request \(250,000 free calls/month\).
- `unfee\_trace\_x402\_wash\_filter`: Run UnFee Trace \(https://unfee.xyz/trace\) on any Base \(8453\), Ethereum \(1\), or XRPL wallet or x402 facilitator to separate verified organic x402 end-user spend from circular agent-to-agent 24h ping-pong wash traffic, self-loops, and sub-cent dust heartbeats. Also returns an Arkham-style counterparty
- `unfee\_address\_guard`: Pre-send address-poisoning & vanity prefix/suffix lookalike spoofing guard for Base \(8453\), Ethereum \(1\), and XRPL wallets. Detects attackers matching the first 3-6 and last 3-6 hex characters of a trusted counterparty while middle bytes differ.

Measured by MCP Station. Methods: https://mcpstation.net/methods.html · Terms: https://mcpstation.net/terms.html