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

xyz.unfeePublished by unfee.xyzOfficial publisherv1.5.0Updated Oct 26, 2026

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

VerifiedStreamable HTTPWeb executableDatabasesFinanceSecurity & Monitoring

Overview

AI-generated overview

UnFee gives an assistant flat-rate Base, Ethereum and XRPL JSON-RPC access plus crypto checkout, x402 payment tracing, tax reports and address-spoofing checks.

What you can do
  • Run JSON-RPC calls on Base, Ethereum and XRPL, including flat-rate eth_getLogs queries
  • Mint an API key with free-tier credits and compare card processor fees against UnFee pricing
  • Create zero-fee crypto payment links, checkout URLs, QR codes and embed snippets
  • Verify transaction hashes and check seller or x402 provider delivery reputation
  • Settle x402 payments only on HTTP-200 proof of delivery, and trace wallets for wash traffic
  • Generate IRS Form 8949 and cost-basis tax reports with CSV export, and screen addresses for lookalike spoofing
When to use it
Useful when an assistant needs on-chain reads across Base, Ethereum or XRPL without per-compute-unit billing, or when working on crypto checkout, x402 payment verification, wallet tax reporting and address-poisoning checks.
Requirements
Remote streamable HTTP endpoint at unfee.xyz; no authentication or headers are declared in the manifest. An UnFee API key is minted through the get_instant_free_rpc_key tool, and some tools are described as paid via x402 or a monthly tier.
Before you install
Tools can create payment links, settle x402 payments and submit raw transactions, which move funds. Tax reports are billed per wallet via x402 or a subscription, and arbitrage scanning is informational only. Wallet addresses and transaction data are sent to a third-party service.

Installation

In SourceWeft

  1. Open UnFee — 1-Credit Base/ETH/XRPL RPC, x402 Trace & Wash Filter, 0% Crypto Checkout & Tax Engine in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/xyz.unfee%2Fmcp/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "unfee-1-credit-base-eth-xrpl-rpc-x402-tr": {
      "type": "http",
      "url": "https://unfee.xyz/mcp"
    }
  }
}

Tools

14

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).

Parameterstierlabel

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).

ParameterstieramountUsdrequiredmonthlyTxCount

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.

ParameterssimulateSpreadBps

verify_transaction

Verify an on-chain Base Mainnet or XRPL transaction hash and return settlement confirmation details.

ParameterstxHashrequirednetworkexpectedAmountexpectedCurrencyexpectedRecipient

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).

Parametersseller

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.

ParametersbuyersellercurrencyamountUsdupstreamBodyexpectedSha256upstreamStatus

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 by 99.9%.

ParametersformatmethodwallettaxYearwallets

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).

ParametersapiKeymethodparams

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).

ParameterschainapiKeytopicsaddresstoBlockfromBlock

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.

ParametersapiKeymethodparams

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).

ParametersapiKeymethodparams

unfee_trace_x402_wash_filter

UnFee Trace — x402 Wash-Volume Filter & Counterparty Leaderboard

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 leaderboard.

Parameterschainaddresstransfers

unfee_address_guard

UnFee Pre-Send Address-Poisoning & Lookalike Spoofing 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.

ParameterstofromchainrecentContacts

Version history

2
  1. v1.5.0LatestOct 26, 2026
  2. v1.4.0Oct 26, 2026

Score

83% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.