AfterFees is answering right now. Last checked 1 min ago. It exposes 27 tools. Last commit 30 Oct 2026.
Crypto funding-rate arbitrage across 50 exchanges, net of fees and order-book slippage. Read-only.
Uptime history
70 hours of history
70 hours agonow
100.0%
Uptime 24h
92 of 92 checks
27
Tools
read from the server
273 ms
Response time
average over 24h
1
Stars
last commit 30 Oct 2026
Nothing serious here today
Today is the operative word: we check AfterFees every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
Connect this server
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 1 min ago.
run in your terminal
claude mcp add afterfees --transport http https://afterfees.xyz/mcpSettings → Connectors → Add custom connector, then paste this address
https://afterfees.xyz/mcp~/.codex/config.toml
[mcp_servers.afterfees]
url = "https://afterfees.xyz/mcp".cursor/mcp.json
{
"mcpServers": {
"afterfees": {
"url": "https://afterfees.xyz/mcp"
}
}
}.vscode/mcp.json
{
"servers": {
"afterfees": {
"type": "http",
"url": "https://afterfees.xyz/mcp"
}
}
}Available tools 27
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
boros
boros_futures_basis
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.
boros_lock_calculator
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.
boros_market
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.
pair
pair_breakdown
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.
pair_history
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.
transfer
transfer_calculator
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.
transfer_routes
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.
basis
basis_trades
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.
best
best_opportunities
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.
borrow
borrow_rates
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.
coin
coin_overview
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.
coins
coins
Coins with a perp on two or more exchanges: exchange count, open interest, highest and lowest funding APR and the best after-fee pair.
dex
dex_scan
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.
exchange
exchange_overview
One exchange: fees and their source, funding intervals, open interest, volume, highest and lowest funding and its best after-fee pairs.
exchanges
exchanges
Every exchange AfterFees reads: kind, fully calculated or watch-only, status, markets, taker / maker fee, open interest, 24 h volume.
execution
execution_cost
Taker fee + order-book slippage to buy or sell a given USD size of one coin on every exchange (perps and spot), cheapest first.
fixed
fixed_vs_floating
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.
funding
funding_rates
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).
holding
holding_scenarios
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).
manual
manual_calculator
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?}.
order
order_checklist
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.
positions
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.
service
service_status
Whether AfterFees data is live right now, which exchange feeds are down, and availability over 1 / 7 / 30 / 90 days.
spread
spread_chart
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.
term
term_structure
Annualised basis of every delivery future of one coin on every exchange we cover, next to perp funding.
track
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.
venue
venue_execution_cost
Taker fee plus order-book slippage to enter $10k / $100k / $1M long and short on one exchange's biggest markets, in basis points.
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://afterfees.xyz/mcp | streamable-http | answering | 264 ms | 1 min ago |
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AfterFees — questions
Answers built from our own checks of this server.
What can AfterFees do?
It exposes 27 tools, read directly from the server on our last check. Among them: basis_trades, best_opportunities, boros_futures_basis, boros_lock_calculator, boros_market, borrow_rates and 21 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README.
How MCP servers expose tools in the first place →
What is AfterFees mostly used for?
Its tools cluster around boros, pair and transfer. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.
Is AfterFees working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 273 ms. The bar chart above shows every period we have measured.
How do I connect AfterFees?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does AfterFees need an API key?
No. AfterFees completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 27 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is AfterFees?
It answers our handshake in 273 ms on average, which is faster than 52% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is AfterFees open source?
The code is open source: it is published under the MIT licence and 1 stars on GitHub. The licence covers the code in the repository, not the hosted service at afterfees.xyz, which runs on its operator's own terms.