MCP server

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

xyz.unfee/mcp

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

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

Website

At a glance

Type

MCP server

Publisher

unfee.xyz (verified by the MCP Registry)

Status

Working at last check

Tools

14

Token cost

About 2,639 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http unfee https://unfee.xyz/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.unfee]
url = "https://unfee.xyz/mcp"

Gemini CLI

{"mcpServers":{"unfee":{"httpUrl":"https://unfee.xyz/mcp"}}}

Cursor

{"mcpServers":{"unfee":{"url":"https://unfee.xyz/mcp"}}}

VS Code

{"servers":{"unfee":{"type":"http","url":"https://unfee.xyz/mcp"}}}

Antigravity

agy mcp add unfee https://unfee.xyz/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"unfee","server_url":"https://unfee.xyz/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"unfee","server_url":"https://unfee.xyz/mcp"}

Tools

• base_rpc_request ~182 tokens
  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).
• compare_payment_fees ~145 tokens
  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).
• create_payment_link Moves money · ~220 tokens
  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).
• eth_getLogs_flat_rate ~245 tokens
  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).
• ethereum_rpc_request ~160 tokens
  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).
• get_instant_free_rpc_key ~114 tokens
  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).
• get_live_arb_opportunities ~105 tokens
  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.
• unfee_address_guard ~251 tokens
  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.
• unfee_check_seller_reputation ~111 tokens
  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_generate_tax_report ~283 tokens
  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
• unfee_pay_with_delivery_proof Moves money · ~270 tokens
  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_trace_x402_wash_filter ~260 tokens
  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
• verify_transaction ~136 tokens
  Verify an on-chain Base Mainnet or XRPL transaction hash and return settlement confirmation details.
• xrpl_rpc_request ~157 tokens
  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.

Browse

• Website monitoring
• Spreadsheets
• Payments
• Invoicing and accounting

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