MAD Synapse · Chain

Cross-chain markets: prices, DeFi TVL, yields, stablecoins, gas, order books, perps funding.

CommunityOnlineNo sign-inGlobalFreeRead-only

What it can do

    What data it sees

    Do you need an account

    No: the server works without sign-in

    Cross-chain markets: prices, DeFi TVL, yields, stablecoins, gas, order books, perps funding.

    How to connect

    How to connect MAD Synapse · Chain to Claude

    The server address to paste into Claude settings:

    https://agent.maddegen.art/hub/mcp/chain

    1. Open Claude (claude.ai or the desktop app).
    2. Go to Settings → Connectors.
    3. Click Add custom connector.
    4. Paste the server address copied below into Remote MCP server URL and click Add.
    5. In a chat, click + → Connectors and switch the new connector on.

    Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

    Authorization

    After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

    How to connect MAD Synapse · Chain to ChatGPT

    The server address to paste into ChatGPT settings:

    https://agent.maddegen.art/hub/mcp/chain

    1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
    2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
    3. Open Settings → Connectors and click Create.
    4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
    5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
    6. In a new chat open + → Apps/Connectors and enable the connector.

    OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

    Authorization

    On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

    How to connect MAD Synapse · Chain to Cursor

    The server address to paste into Cursor settings:

    https://agent.maddegen.art/hub/mcp/chain

    Fastest: click Open in Cursor below and confirm the prompt.

    Manually:

    1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
    2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
    3. Save the file. The server appears in the MCP list; authorize it there if asked.

    Authorization

    If the service needs sign-in, an authorize button appears next to the server in the MCP list.

    Server tool list (15)

    Raw names from tools/list. Only developers need these.

    crypto_priceLive USD price and 24 h change for up to 30 crypto assets on any chain — by symbol, CoinGecko id, contract or mint address. Resolves each asset (BTC, "coingecko:ethereum", "base:0x…", a bare 0x address with chain, or a Solana mint) and prices it from DefiLlama's aggregated oracle (confidence score included). Symbols resolve against the top 1,000 coins by market cap first, so "USDC" means the real one; ambiguous symbols list the alternatives. When to use: For current prices by symbol on any chain; for Solana mints by address use price (on the MAD Synapse · Wallets & Risk server, https://agent.maddegen.art/hub/mcp/risk); for history use price_history. Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).
    price_historyHistorical USD prices for any crypto asset (hourly or daily, up to 365 days) with return, high/low, max drawdown and annualized volatility. Same asset resolution as crypto_price. Returns the series plus stats computed from it: total return, high/low with dates, max drawdown, and annualized volatility from log returns. When to use: For past prices and drawdowns; for the current price (on the MAD Synapse · Wallets & Risk server, https://agent.maddegen.art/hub/mcp/risk) use crypto_price. Price: $0.002 per call (10 free/day; after that a payment-required result lists x402 options). Errors: returns isError with a message for invalid input or an upstream failure (not charged).
    defi_rankingsTop DeFi protocols by TVL (or 1 d / 7 d TVL change), filterable by chain and category — lending, DEX, liquid staking, bridges, perps… From DefiLlama's full protocol list (~6,000 protocols). Each row: TVL, TVL on the requested chain, 1 h/1 d/7 d change, market cap, category, chains, site. Use for "biggest lending protocols on Base" or "fastest growing DEXes this week". When to use: To rank protocols; for one protocol in depth use defi_protocol. Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).
    defi_protocolOne DeFi protocol in depth: TVL by chain, TVL trend, fees and revenue (24 h/7 d/30 d), market cap, audits, links. Look up by name or DefiLlama slug ("aave", "Uniswap", "jupiter"). Combines DefiLlama's protocol list with its fees/revenue summaries. Fuzzy name matches return the best match plus close alternatives. Price: $0.002 per call (10 free/day; after that a payment-required result lists x402 options). Errors: returns isError with a message for invalid input or an upstream failure (not charged).
    chain_tvlTotal value locked on every blockchain right now, ranked — or one chain's daily TVL history. DefiLlama chain TVL. Without "chain": ranking of all chains with token symbol. With "chain": daily TVL history for up to 365 days plus 7 d / 30 d / 90 d change. When to use: For chain-level TVL; for protocols use defi_rankings. Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).
    yield_poolsSearch ~19,000 DeFi yield pools across all chains: filter by chain, protocol, token, stablecoin-only, min TVL; sort by APY or TVL. Base vs reward APY, 30 d mean, IL risk. DefiLlama yields data, refreshed every 15 minutes. Shows APY split into base (organic fees/interest) and reward (token emissions), the 30-day mean APY so an agent can spot unsustainable spikes, impermanent-loss risk, exposure (single/multi) and DefiLlama's up/down prediction. Price: $0.003 per call (10 free/day; after that a payment-required result lists x402 options). Errors: returns isError with a message for invalid input or an upstream failure (not charged).
    stablecoinsEvery stablecoin's circulating supply, 1 d/7 d/30 d supply change, current price and peg deviation — spot depegs and mint/burn flows. DefiLlama stablecoin data across all chains. Filter by symbol or peg type. peg_deviation_pct is measured against the peg (USD, EUR…) using DefiLlama's price. Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).
    dex_volumesDEX trading volume in the last 24 h / 7 d / 30 d — all chains or one — with the top DEXes and their share and change. DefiLlama DEX overview. Optionally scoped to one chain. Includes perps with type=perps (derivatives volume) or aggregators. Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).
    fees_revenueWhich protocols and chains earn the most: fees or revenue over 24 h / 7 d / 30 d, filterable by chain — the cash-flow view of crypto. DefiLlama fees/revenue overview. "fees" = what users paid; "revenue" = what the protocol kept. Ranked, with day-over-day change. Price: $0.002 per call (10 free/day; after that a payment-required result lists x402 options). Errors: returns isError with a message for invalid input or an upstream failure (not charged).
    gas_nowWhat a transaction costs right now on 17 EVM chains, Solana and Bitcoin — gwei/priority fee and the USD cost of a transfer and a swap on each. EVM: base fee + priority fee from the latest block (eth_feeHistory), USD cost of a 21,000-gas transfer and a ~150,000-gas swap (L2s shown before their L1 data fee). Solana: recent prioritization-fee percentiles. Bitcoin: mempool.space recommended sat/vB with USD for a typical 140 vB transaction. Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).
    cex_tickerLive bid/ask/last, 24 h change, volume and range for a pair on Kraken, Coinbase and OKX side by side — with the cross-venue spread. Queries each venue's public ticker in parallel. OKX quotes in USDT when USD is asked for. The cross-venue spread shows arbitrage gaps and which venue is off. When to use: For top-of-book prices; for how much size the book can absorb use orderbook_depth. Price: $0.001 per call (10 free/day; after that a payment-required result lists x402 options). Errors: returns isError with a message for invalid input or an upstream failure (not charged).
    orderbook_depthHow much size a market can take: bid/ask depth within ±0.1/0.5/1/2/5%, spread, and the slippage of a $10k/$100k/$1M market order on Kraken, Coinbase or OKX. Pulls the full public L2 book and walks it. Use before sizing an order or comparing venue liquidity. slippage is vs. mid price, in basis points; null means the fetched book was too thin for that size. When to use: For liquidity and slippage; for just prices use cex_ticker. Price: $0.003 per call (10 free/day; after that a payment-required result lists x402 options). Errors: returns isError with a message for invalid input or an upstream failure (not charged).
    funding_ratesPerpetual funding for a coin on Hyperliquid, OKX and Kraken Futures side by side — per-interval rate and annualized APR — plus open interest and mark price. Positive = longs pay shorts. Each venue's rate is normalized to an hourly figure and annualized so they compare directly (OKX settles every 1–8 h, Hyperliquid hourly, Kraken hourly). Use for basis/carry trades or crowding signals. When to use: For one coin across venues; to scan every Hyperliquid market use hyperliquid_markets. Price: $0.003 per call (10 free/day; after that a payment-required result lists x402 options). Errors: returns isError with a message for invalid input or an upstream failure (not charged).
    hyperliquid_marketsEvery Hyperliquid perpetual: mark/oracle price, 24 h change and volume, open interest, funding APR, premium — ranked by volume, OI, funding or movers. Live from Hyperliquid's public info API. Filter to one coin or rank the whole board. Funding is hourly on Hyperliquid; apr = hourly × 8,760. Price: $0.002 per call (10 free/day; after that a payment-required result lists x402 options). Errors: returns isError with a message for invalid input or an upstream failure (not charged).
    fear_greedThe Crypto Fear & Greed Index (0–100) now and its history, with the 7 d / 30 d average and how extreme today is. alternative.me index, daily. Up to 365 days of history. Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).