API reference, Market data

Pool stream

• Elysium: One pool on Elysium (GET /v1/pools/{address}: price, liquidity and depth, 5m to 24h activity, LPs), pushed on subscribe, then in each block that touches it: swap, liquidity added or removed, balance moved.
• HyperEVM: One pool on HyperEVM (GET /v1/pools/{address}: price, liquidity and depth, 5m to 24h activity, LPs), pushed on subscribe, then in each block that touches it: swap, liquidity added or removed, balance moved.

• Elysium
• HyperCore: not served
• HyperEVM

• Not on HyperCore: HyperCore trades on its order book, not on pools: its markets, trades and candles are on the same pages

WebSocket channel elysium.pool on wss://api.femtos.xyz/v1/ws | WebSocket channel hyperevm.pool on wss://api.femtos.xyz/v1/ws

Parameters

Subscribe

Elysium

{"op":"subscribe","channel":"elysium.pool","filter":{"pool":"<pair>"}}

HyperEVM

{"op":"subscribe","channel":"hyperevm.pool","filter":{"pool":"<evmPair>"}}

Key: Authorization: Bearer $FEMTOS_KEY. Get a free key, or with no browser through agent onboarding.

Response fields

Related: Market data

• Markets GET /v1/markets Elysium, HyperCore, HyperEVM
  Every tradable perp, spot, HIP-3 and outcome market with 24 h stats.
• Markets stream WS elysium.markets | hc.markets | hyperevm.markets Elysium, HyperCore, HyperEVM
  The GET /v1/markets list of HyperCore (prices, 24 h volume and change), pushed on subscribe and when it changes.
• Token screener GET /v1/tokens/top Elysium, HyperEVM
  The tokens of HyperEVM, one row each over all their pools: trending, volume, gainers, losers, new, market cap, liquidity.
• Candles GET /v1/candles Elysium, HyperCore, HyperEVM
  OHLCV of any HyperCore market down to 1 s, ascending, UTC-aligned.
• Forming candle WS elysium.candles | hc.candles | hyperevm.candles Elysium, HyperCore, HyperEVM
  The forming candle, pushed once per block where it changes.
• Token candles GET /v1/candles Elysium, HyperCore, HyperEVM
  OHLCV of a token through its USDC market (a perp coin: the perp).
• Token candles stream WS elysium.token.candles | hc.token.candles | hyperevm.token.candles Elysium, HyperCore, HyperEVM
  A token's candles by name (its USDC market; a perp coin: the perp), the forming candle pushed once per block where it changes.
• Trades GET /v1/trades Elysium, HyperCore, HyperEVM
  Latest fills of one market, newest first.
• Trades stream WS elysium.trades | hc.trades | hyperevm.trades Elysium, HyperCore, HyperEVM
  All trades of one market as they happen: raced between our node and Hyperliquid's public feed, first copy sent, the other dropped.
• Swap history stream WS elysium.trades.history | hyperevm.trades.history Elysium, HyperEVM
  The latest swaps of a token or pool on HyperEVM (GET /v1/trades with filters), pushed on subscribe, then each block with a new swap it shows.
• Order book GET /v1/book HyperCore
  L2 book of one market with order counts, from our node.
• Book stream WS hc.book HyperCore
  Full-depth book, then the levels each block changes.
• Named wallets on the book WS hc.book.named HyperCore
  Who sits on the book: the resting limit orders of the named wallets (funds, traders, KOLs), by level, live.
• Walls on the book WS hc.book.walls HyperCore
  Every large resting order on the book with its owner, live, and whether that owner's walls hold or are pulled when the price comes.
• Wall reliability GET /v1/hypercore/walls HyperCore
  Which accounts' large resting orders hold when the price comes, and which are pulled.
• Walls held or pulled GET /v1/hypercore/walls/events HyperCore
  One market's walls the price came to, one by one: held or pulled, when and whose.
• Best bid / offer WS hc.bbo HyperCore
  Top of book of one market each block: raced between Hyperliquid's public feed and our node (newest block wins, our node corrects the same block).
• Asset contexts stream WS hc.ctx HyperCore
  Mark, oracle, mid, funding, open interest and 24 h volume of every HyperCore market, pushed as they change: one read per second for every subscriber.
• Order updates WS hc.orders HyperCore
  Every order status change, filterable by coin, user and status. One frame per block with all its matching events.
• Token prices GET /v1/prices Elysium, HyperCore, HyperEVM
  USD price of up to 100 tokens in one call, each with its source and provenance.
• Price history GET /v1/prices/history Elysium, HyperCore, HyperEVM
  USD closes per unit of up to 25 tokens over a window, or the price of 100 tokens at one time (at=).
• HYPE price WS prices.hype HyperCore
  HYPE from HyperCore’s spot mid (each block), the Hyperliquid oracle and perp mark, and exchanges.
• Token prices stream WS elysium.prices | hyperevm.prices Elysium, HyperEVM
  USD prices of up to 100 HyperEVM tokens, as GET /v1/prices answers them, pushed in each block that changes one.
• Pool detail GET /v1/pools/{address} Elysium, HyperEVM
  One pool: dex, fee, tokens, liquidity in USD, depth, 5m to 24h activity, top LPs.
• Liquidity events GET /v1/liquidity Elysium, HyperEVM
  Liquidity added to and removed from one pool, newest first.
• Liquidity events stream WS elysium.liquidity | hyperevm.liquidity Elysium, HyperEVM
  Liquidity added to and removed from one pool on HyperEVM (GET /v1/liquidity), pushed on subscribe, then in each block that adds or removes some.
• Daily token volume GET /v1/volume Elysium, HyperEVM
  USD swap volume of a token per UTC day, both sides of every priced swap.

More

• This page as Markdown
• The whole API reference
• What Elysium serves
• What HyperEVM serves
• The whole API in one Markdown file
• OpenAPI 3.1 document

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