AfterFees
Crypto funding-rate arbitrage across 50 exchanges, net of fees and order-book slippage. Read-only.
使うべきか
品質と安全性
検出事項（4）
- LOWTool 'venue_execution_cost' description lacks action verbvenue_execution_cost 内
- LOWTool 'service_status' description lacks action verbservice_status 内
- LOWTool 'boros_market' description lacks action verbboros_market 内
- LOWTool 'spread_chart' description lacks action verbspread_chart 内
ツール定義とプロトコルへの準拠に関する自動分析に基づいています。
コンテキストコスト
これは、サーバーのツールがモデルのコンテキストに読み込まれるたびに消費されるおおよそのトークン数です。数が多いほど、ほかのタスクに使える注意が減ります。
インストール
ワンクリックインストール
これを `claude_desktop_config.json` ファイルに追加してください:
{
"mcpServers": {
"afterfees": {
"url": "https://afterfees.xyz/mcp"
}
}
}リモートエンドポイント
https://afterfees.xyz/mcpstreamable-httpできること
ツール一覧
ツール（27）
🟢best_opportunities(notional, holding_hours, mode, actionable_only, limit, ...)
Ranked funding-rate arbitrage pairs (long one market, short another) with the net result after taker fees and order-book slippage at your size, max size, breakeven, settled 7-day replay, tier (actionable / watch) and reasons.
入力スキーマ
{
"type": "object",
"properties": {
"notional": {
"type": "number",
"description": "Position size per side in USD (default 10000)",
"minimum": 10,
"maximum": 100000000,
"default": 10000
},
"holding_hours": {
"type": "number",
"description": "Holding period in hours (default 168 = 7 days)",
"minimum": 1,
"maximum": 2160,
"default": 168
},
"mode": {
"type": "string",
"enum": [
"all",
"perp",
"spot",
"rev"
],
"default": "all",
"description": "perp = perp vs perp, spot = buy spot + short perp, rev = borrow-and-sell spot + long perp"
},
"actionable_only": {
"type": "boolean",
"default": true,
"description": "Only pairs that pass every check right now (live books, positive net, capacity)"
},
"limit": {
"type": "integer",
"minimum": 1,
"maximum": 50,
"default": 10
},
"base": {
"type": "string",
"description": "Only this coin (optional)"
}
},
"required": [],
"additionalProperties": false
}🟢coin_overview(base, notional)
Funding rate of one coin on every exchange (rate, interval, APR, predicted, OI, volume, settled 7-day sum) plus its best pairs, net after fees and slippage at your size.
入力スキーマ
{
"type": "object",
"properties": {
"base": {
"type": "string",
"description": "Coin or ticker, e.g. BTC, ETH, SOL"
},
"notional": {
"type": "number",
"description": "Position size per side in USD (default 10000)",
"minimum": 10,
"maximum": 100000000,
"default": 10000
}
},
"required": [
"base"
],
"additionalProperties": false
}🟢pair_breakdown(pair_key, notional, holding_hours)
Full calculation of one pair: funding per leg and settlement count, taker fees, order-book VWAP and slippage per trade, carry, net, net if rates halve, breakeven, capacity, settled 7/30-day replay. pair_key comes from best_opportunities or coin_overview. Needs a Pro API token (Authorization: Bearer arb_…); not available on the anonymous tier.
入力スキーマ
{
"type": "object",
"properties": {
"pair_key": {
"type": "string",
"description": "pair_key from another tool"
},
"notional": {
"type": "number",
"description": "Position size per side in USD (default 10000)",
"minimum": 10,
"maximum": 100000000,
"default": 10000
},
"holding_hours": {
"type": "number",
"description": "Holding period in hours (default 168 = 7 days)",
"minimum": 1,
"maximum": 2160,
"default": 168
}
},
"required": [
"pair_key"
],
"additionalProperties": false
}🟢funding_rates(base, limit, min_oi_usd)
Current perpetual funding rates (gross, before costs). With base: that coin on every exchange, highest first. Without: the top N markets by absolute APR (OI filter applies).
入力スキーマ
{
"type": "object",
"properties": {
"base": {
"type": "string",
"description": "Coin (optional)"
},
"limit": {
"type": "integer",
"minimum": 1,
"maximum": 100,
"default": 20
},
"min_oi_usd": {
"type": "number",
"minimum": 0,
"default": 100000,
"description": "Skip markets with less open interest (top-N mode only)"
}
},
"required": [],
"additionalProperties": false
}🟢borrow_rates(base, limit)
Margin borrow rates per coin and exchange (VIP0, current and 24 h / 7 d averages, limits, inventory) with the most negative perp funding: the two halves of a reverse spot-perp carry.
入力スキーマ
{
"type": "object",
"properties": {
"base": {
"type": "string",
"description": "Coin (optional)"
},
"limit": {
"type": "integer",
"minimum": 1,
"maximum": 100,
"default": 20
}
},
"required": [],
"additionalProperties": false
}🟢fixed_vs_floating(side, base, notional, limit)
Pendle Boros markets: the fixed funding rate you can lock (net of Boros fees and fill at your size) against the term-matched floating benchmark, advantage, win rate, capacity. side=short locks an income, side=long locks a cost.
入力スキーマ
{
"type": "object",
"properties": {
"side": {
"type": "string",
"enum": [
"short",
"long"
],
"default": "short"
},
"base": {
"type": "string",
"description": "Coin (optional)"
},
"notional": {
"type": "number",
"description": "Position size per side in USD (default 10000)",
"minimum": 10,
"maximum": 100000000,
"default": 10000
},
"limit": {
"type": "integer",
"minimum": 1,
"maximum": 50,
"default": 10
}
},
"required": [],
"additionalProperties": false
}🟢execution_cost(base, size_usd)
Taker fee + order-book slippage to buy or sell a given USD size of one coin on every exchange (perps and spot), cheapest first.
入力スキーマ
{
"type": "object",
"properties": {
"base": {
"type": "string",
"description": "Coin or ticker, e.g. BTC, ETH, SOL"
},
"size_usd": {
"type": "number",
"minimum": 100,
"maximum": 50000000,
"default": 100000
}
},
"required": [
"base"
],
"additionalProperties": false
}🟢basis_trades(base, notional, actionable_only, scope, limit)
Spot or perp against a dated future held to delivery, on one exchange or across two (perp on one, future on another), and two same-day futures on different exchanges: net to expiry after fees and slippage at your size, net APR, basis APR, max size, tier and reasons.
入力スキーマ
{
"type": "object",
"properties": {
"base": {
"type": "string",
"description": "Coin (optional)"
},
"notional": {
"type": "number",
"description": "Position size per side in USD (default 10000)",
"minimum": 10,
"maximum": 100000000,
"default": 10000
},
"actionable_only": {
"type": "boolean",
"default": false
},
"scope": {
"type": "string",
"enum": [
"same",
"cross"
],
"description": "same exchange or cross-exchange rows only (optional)"
},
"limit": {
"type": "integer",
"minimum": 1,
"maximum": 50,
"default": 10
}
},
"required": [],
"additionalProperties": false
}🟢transfer_routes(base, notional, include_hedge, view, status, ...)
Buy a coin on one exchange, withdraw it on a network both exchanges share (same chain and contract, never matched by ticker), sell on another: real-transfer net after taker fees, order-book slippage and the withdrawal fee at your size, pre-funded net, capacity at net >= 0 / 0.3% / 1%, arrival estimate, hedge cost on a perp, status and reasons. view=traps lists spreads that exist only because deposits or withdrawals are closed.
入力スキーマ
{
"type": "object",
"properties": {
"base": {
"type": "string",
"description": "Coin (optional)"
},
"notional": {
"type": "number",
"minimum": 100,
"maximum": 10000000,
"default": 10000,
"description": "Size in USD (Pro; free uses 10000)"
},
"include_hedge": {
"type": "boolean",
"default": false
},
"view": {
"type": "string",
"enum": [
"routes",
"traps"
],
"default": "routes"
},
"status": {
"type": "string",
"enum": [
"executable",
"near",
"closed",
"unverified",
"all"
],
"default": "executable"
},
"limit": {
"type": "integer",
"minimum": 1,
"maximum": 50,
"default": 10
}
},
"required": [],
"additionalProperties": false
}🟢pair_history(pair_key, range, notional)
Funding actually settled on both legs over 7 / 30 / 90 / 180 / 365 days, applied to today's orientation at your size: net after the four trading costs, max drawdown, negative days, daily sign flips, how far back each exchange's history reaches. Ranges beyond 7 days need Pro.
入力スキーマ
{
"type": "object",
"properties": {
"pair_key": {
"type": "string",
"description": "pair_key from another tool"
},
"range": {
"type": "string",
"enum": [
"7d",
"30d",
"90d",
"180d",
"365d"
],
"default": "30d"
},
"notional": {
"type": "number",
"description": "Position size per side in USD (default 10000)",
"minimum": 10,
"maximum": 100000000,
"default": 10000
}
},
"required": [
"pair_key"
],
"additionalProperties": false
}🟢term_structure(base)
Annualised basis of every delivery future of one coin on every exchange we cover, next to perp funding.
入力スキーマ
{
"type": "object",
"properties": {
"base": {
"type": "string",
"description": "Coin or ticker, e.g. BTC, ETH, SOL"
}
},
"required": [
"base"
],
"additionalProperties": false
}🟢venue_execution_cost(venue, limit)
Taker fee plus order-book slippage to enter $10k / $100k / $1M long and short on one exchange's biggest markets, in basis points.
入力スキーマ
{
"type": "object",
"properties": {
"venue": {
"type": "string",
"description": "exchange id, e.g. binance"
},
"limit": {
"type": "integer",
"minimum": 1,
"maximum": 60,
"default": 20
}
},
"required": [
"venue"
],
"additionalProperties": false
}🟢service_status
Whether AfterFees data is live right now, which exchange feeds are down, and availability over 1 / 7 / 30 / 90 days.
入力スキーマ
{
"type": "object",
"properties": {},
"required": [],
"additionalProperties": false
}🟢order_checklist(pair_key, notional)
The two orders to place by hand for one pair: action, exchange, symbol, quantity in the exchange's own unit (contracts where one contract is not one coin), notional, assumed leverage and a link to each contract's trading page (no referral parameters). AfterFees never trades.
入力スキーマ
{
"type": "object",
"properties": {
"pair_key": {
"type": "string",
"description": "pair_key from another tool"
},
"notional": {
"type": "number",
"description": "Position size per side in USD (default 10000)",
"minimum": 10,
"maximum": 100000000,
"default": 10000
}
},
"required": [
"pair_key"
],
"additionalProperties": false
}🟢holding_scenarios(pair_key, notional, assumed_rates_pct)
Net after fees and slippage of one live pair held 8 h, 1 d, 3 d, 7 d and 30 d, optionally with your own assumed funding rate per leg (percent per funding period, keyed by instrument_id).
入力スキーマ
{
"type": "object",
"properties": {
"pair_key": {
"type": "string"
},
"notional": {
"type": "number",
"description": "Position size per side in USD (default 10000)",
"minimum": 10,
"maximum": 100000000,
"default": 10000
},
"assumed_rates_pct": {
"type": "object",
"additionalProperties": {
"type": "number"
},
"description": "{instrument_id: rate per period in %} (optional)"
}
},
"required": [
"pair_key"
],
"additionalProperties": false
}🟢manual_calculator(legs, notional, holding_hours, slippage_bps, leverage)
Net, net APR, breakeven and funding-halved case for two legs you describe (no live data): each leg {side: long|short, rate_pct per period, interval_hours, taker_bps, first_in_hours?}.
入力スキーマ
{
"type": "object",
"properties": {
"legs": {
"type": "array",
"minItems": 2,
"maxItems": 2,
"items": {
"type": "object"
}
},
"notional": {
"type": "number",
"description": "Position size per side in USD (default 10000)",
"minimum": 10,
"maximum": 100000000,
"default": 10000
},
"holding_hours": {
"type": "number",
"description": "Holding period in hours (default 168 = 7 days)",
"minimum": 1,
"maximum": 2160,
"default": 168
},
"slippage_bps": {
"type": "number",
"minimum": 0,
"maximum": 500
},
"leverage": {
"type": "number",
"minimum": 1,
"maximum": 100
}
},
"required": [
"legs"
],
"additionalProperties": false
}🟢boros_lock_calculator(side, rate_pct, days, notional, taker_pct, ...)
Locked net (income) or cost APR on Pendle Boros at an implied APR you give, after the taker and settlement fees and the entry cost, its advantage over a floating APR you expect and the break-even floating rate. Percent inputs.
入力スキーマ
{
"type": "object",
"properties": {
"side": {
"type": "string",
"enum": [
"income",
"cost"
],
"default": "income"
},
"rate_pct": {
"type": "number"
},
"days": {
"type": "number",
"minimum": 0.1,
"maximum": 730
},
"notional": {
"type": "number",
"description": "Position size per side in USD (default 10000)",
"minimum": 10,
"maximum": 100000000,
"default": 10000
},
"taker_pct": {
"type": "number",
"default": 0.05
},
"settle_pct": {
"type": "number",
"default": 0.1
},
"entry_usd": {
"type": "number",
"default": 1.5
},
"floating_pct": {
"type": "number"
}
},
"required": [
"rate_pct",
"days"
],
"additionalProperties": false
}🟢transfer_calculator(buy, sell, amount, fee_a_pct, fee_b_pct, ...)
Buy on exchange A, withdraw, sell on exchange B at prices you give: real-transfer and prefunded net, break-even premium. Fees in percent, withdrawal fee in coins.
入力スキーマ
{
"type": "object",
"properties": {
"buy": {
"type": "number"
},
"sell": {
"type": "number"
},
"amount": {
"type": "number",
"default": 10000
},
"fee_a_pct": {
"type": "number",
"default": 0.1
},
"fee_b_pct": {
"type": "number",
"default": 0.1
},
"withdraw_coin": {
"type": "number",
"default": 0
},
"usdt_back": {
"type": "number",
"default": 1
},
"trips": {
"type": "number",
"default": 1
}
},
"required": [
"buy",
"sell"
],
"additionalProperties": false
}🟢boros_market(market_id, side, notional)
Detail of one Boros market (id from fixed_vs_floating): fixed rate at your size net of fees, floating benchmarks, advantage, win rate, capacity, reasons.
入力スキーマ
{
"type": "object",
"properties": {
"market_id": {
"type": "integer"
},
"side": {
"type": "string",
"enum": [
"short",
"long"
]
},
"notional": {
"type": "number",
"description": "Position size per side in USD (default 10000)",
"minimum": 10,
"maximum": 100000000,
"default": 10000
}
},
"required": [
"market_id"
],
"additionalProperties": false
}🟢boros_futures_basis(notional, limit)
Lock funding on Boros against a delivery future of the same maturity: implied APR vs basis APR, net after fees and slippage at your size.
入力スキーマ
{
"type": "object",
"properties": {
"notional": {
"type": "number",
"description": "Position size per side in USD (default 10000)",
"minimum": 10,
"maximum": 100000000,
"default": 10000
},
"limit": {
"type": "integer",
"minimum": 1,
"maximum": 50,
"default": 10
}
},
"required": [],
"additionalProperties": false
}🟢exchanges
Every exchange AfterFees reads: kind, fully calculated or watch-only, status, markets, taker / maker fee, open interest, 24 h volume.
入力スキーマ
{
"type": "object",
"properties": {},
"required": [],
"additionalProperties": false
}🟢exchange_overview(venue)
One exchange: fees and their source, funding intervals, open interest, volume, highest and lowest funding and its best after-fee pairs.
入力スキーマ
{
"type": "object",
"properties": {
"venue": {
"type": "string",
"description": "exchange id, e.g. binance"
}
},
"required": [
"venue"
],
"additionalProperties": false
}🟢coins(group, limit)
Coins with a perp on two or more exchanges: exchange count, open interest, highest and lowest funding APR and the best after-fee pair.
入力スキーマ
{
"type": "object",
"properties": {
"group": {
"type": "string",
"enum": [
"all",
"crypto",
"equity",
"commodity",
"index",
"fx"
],
"default": "all"
},
"limit": {
"type": "integer",
"minimum": 1,
"maximum": 500,
"default": 30
}
},
"required": [],
"additionalProperties": false
}🟢track_record
How AfterFees' daily top picks actually did: predicted net vs net realised from settled funding over the hold, hit rate, mean error, latest picks.
入力スキーマ
{
"type": "object",
"properties": {},
"required": [],
"additionalProperties": false
}🟢dex_scan(base, limit)
Tokens our exchanges list with a verified contract on Ethereum, BNB Chain, Base, Arbitrum or Solana whose DEX price is more than 1% away: net at $1k / $5k / $10k after aggregator price impact, swap gas, the token transfer gas and the exchange's withdrawal fee, status and reasons. Pro. Needs a Pro API token (Authorization: Bearer arb_…); not available on the anonymous tier.
入力スキーマ
{
"type": "object",
"properties": {
"base": {
"type": "string",
"description": "Token (optional)"
},
"limit": {
"type": "integer",
"minimum": 1,
"maximum": 50,
"default": 10
}
},
"required": [],
"additionalProperties": false
}🟢spread_chart(leg_a, leg_b, candle, days, executable)
Candles of (A − B) / B between any two instruments (book mids where stored, else marks). Free: 1 h candles and longer over up to 7 days; Pro: 1 m and up, up to 365 days.
入力スキーマ
{
"type": "object",
"properties": {
"leg_a": {
"type": "string",
"description": "instrument id, e.g. binance:um:BTCUSDT"
},
"leg_b": {
"type": "string",
"description": "instrument id"
},
"candle": {
"type": "string",
"enum": [
"1m",
"5m",
"15m",
"1h",
"4h",
"1d"
],
"default": "1h"
},
"days": {
"type": "integer",
"minimum": 1,
"maximum": 365,
"default": 7
},
"executable": {
"type": "boolean",
"default": false
}
},
"required": [
"leg_a",
"leg_b"
],
"additionalProperties": false
}🟢my_positions
Your positions across the read-only exchange keys connected to your AfterFees account, grouped into hedges: delta drift, distance to liquidation, funding received, issues. Needs a Pro account token; AfterFees only accepts read-only keys. Needs a Pro API token (Authorization: Bearer arb_…); not available on the anonymous tier.
入力スキーマ
{
"type": "object",
"properties": {},
"required": [],
"additionalProperties": false
}コミュニティ
エビデンス