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8 clients · secrets stay placeholders

JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

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

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

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

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "unfee": {
      "type": "remote",
      "url": "https://unfee.xyz/mcp",
      "enabled": true
    }
  }
}

{
  "mcpServers": {
    "unfee": {
      "type": "http",
      "url": "https://unfee.xyz/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=unfee&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vdW5mZWUueHl6L21jcCJ9"
}

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

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

extensions:
  "unfee":
    enabled: true
    name: "unfee"
    type: streamable_http
    uri: "https://unfee.xyz/mcp"
    timeout: 300

Quality 86 / 100good

protocol75 · weight 25

warn
protocol.modernnewest supported version is 2024-11-05; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
n/a
protocol.statelessonly applies to 2026-07-28 servers
pass
protocol.transportstreamable HTTP
n/a
protocol.list_ttlonly applies to 2026-07-28 servers

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygiene88 · weight 30

pass
tools.descriptionsevery tool has a description
pass
tools.description_lengthdescriptions are concise
pass
tools.schemasevery tool has an object input schema
warn
tools.annotationsonly 2 of 14 tools declare readOnlyHint or destructiveHint
warn
tools.directory_hints2 of 14 tools declare all four hints; missing: create_payment_link (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get_live_arb_opportunities (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); unfee_check_seller_reputation (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); …
pass
tools.token_costabout 2,336 tokens to load every tool
pass
tools.api_dumptools are not a one-to-one API dump
pass
tools.hidden_textno hidden text in tool names, descriptions, schemas or annotations

stability100 · weight 15

pass
stability.changes2 tool changes in 30 days
pass
stability.rug_pullno tool changed its meaning under the same name
pass
stability.new_linksno tool change named a new site

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

14 tools, about 2,336 tokens to load them all · tool set 9d1d9a68a43f · tools last changed 2026-10-26 · checked 2026-11-14 07:03 UTC

Tool changes

2026-10-26unfee_address_guardadded
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.
2026-10-26unfee_trace_x402_wash_filteradded
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.

Full history: list_changes · trend: quality JSON.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 53 / 100

no-repositoryunreachable

provenance55

liveness0

freshness100

hygiene80

+dns-namespace +website -unreachable(8 failures) +updated-19d-ago -no-repository

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://unfee.xyz/mcp` streamable-http	none	no (8 failures)	65%	439 ms	2024-11-05	2026-10-29
`https://unfee-gateway.unfee.workers.dev/mcp` streamable-http	none	no (8 failures)	64%	208 ms	2024-11-05	2026-10-29

Tools (14)

`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).
`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).
`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).
`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).
`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).
`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).
`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.
`unfee_address_guard`read-only	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`	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`	Generate an instant read-only IRS Form 8949, Schedule D summary, HIFO/FIFO/LIFO cost-basis calculation, non-taxable self-transfer matching, instant email CSV delivery (POST /api/v1/tax/email-export & POST /api/v1/tax/email-report), and TurboTax / H&R Block / TaxAct / FreeTaxUSA / QuickBooks / 1099-DA CSV export across 10 chains (Base, Ethereum, XRP Ledger, Solana, Bitcoin, Arbitrum One, Polygon PoS, Optimism, BNB Smart Chain (BSC), Avalanche C-Chain) ($0 Free preview forever, $10 Single-Year Tax Report Pass tax_report_10_onetime, $19 All-Years + DeFi & 1099-DA CPA Pack tax_all_years_19_onetime, or $20/mo 24/7 Live Wallet, DeFi & Tax Alerts Pro wallet_alerts_20_monthly).
`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_trace_x402_wash_filter`read-only	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.
`verify_transaction`	Verify an on-chain Base Mainnet or XRPL transaction hash and return settlement confirmation details.
`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.

Schemas: list_tools.

Similar MCP servers

Official server.json

{
  "name": "xyz.unfee/mcp",
  "_meta": {
    "io.modelcontextprotocol.registry/publisher-provided": {
      "xyz.unfee": {
        "x402": {
          "supported": true,
          "topupRate": "$1.00 USDC = +2,000,000 RPC Credits ($0.50 per 1M calls)",
          "facilitator": "https://unfee.xyz/api/x402/verify"
        },
        "tools": [
          "create_payment_link",
          "get_instant_free_rpc_key",
          "compare_payment_fees",
          "get_live_arb_opportunities",
          "verify_transaction",
          "unfee_check_seller_reputation",
          "unfee_pay_with_delivery_proof",
          "unfee_generate_tax_report",
          "base_rpc_request",
          "eth_getLogs_flat_rate",
          "xrpl_rpc_request",
          "ethereum_rpc_request",
          "unfee_trace_x402_wash_filter",
          "unfee_address_guard"
        ],
        "rpcHubUrl": "https://unfee.xyz/rpc",
        "chainlistUrl": "https://unfee.xyz/chainlist.json",
        "taxPortalUrl": "https://unfee.xyz/tax",
        "serverCardUrl": "https://unfee.xyz/.well-known/mcp/server-card.json",
        "tracePortalUrl": "https://unfee.xyz/trace",
        "rpcFailoverSdkUrl": "https://unfee.xyz/rpc.js",
        "etherscanV2DropInUrl": "https://unfee.xyz/v2/api",
        "walletInUrlEndpoints": {
          "base": "https://api.unfee.xyz/rpc/base/0xYourWallet",
          "xrpl": "https://api.unfee.xyz/rpc/xrpl/rYourWallet",
          "ethereum": "https://api.unfee.xyz/rpc/eth/0xYourWallet"
        },
        "errorRescueCapabilities": [
          "HTTP 429 Too Many Requests auto-failover",
          "JSON-RPC -32005 / -32011 / -32602 rate-limit & block-range rescue",
          "10,000-block auto-chunked eth_getLogs at 1 flat credit (no 75-500x CU multiplier)",
          "Full JSON-RPC 2.0 batch array support ([{...}, {...}]) for ethers v6, viem, Foundry & Hardhat",
          "Live x402 Organic vs. Wash/Test Volume Filter (/trace) & Pre-Send Address-Poisoning Guard"
        ]
      }
    }
  },
  "icons": [
    {
      "src": "https://unfee.xyz/brand/logo-circle.svg",
      "sizes": [
        "any"
      ],
      "mimeType": "image/svg+xml"
    }
  ],
  "title": "UnFee — 1-Credit Base/ETH/XRPL RPC, x402 Trace & Wash Filter, 0% Crypto Checkout & Tax Engine",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://unfee.xyz/mcp",
      "type": "streamable-http"
    },
    {
      "url": "https://unfee-gateway.unfee.workers.dev/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "1.5.0",
  "websiteUrl": "https://unfee.xyz/rpc",
  "description": "Flat 1-credit Base/ETH/XRPL RPC (eth_getLogs=1 credit), x402 wash filter, 0% checkout & tax CSV."
}