API reference, Bridges & wallets
Wallet PnL stream
- Elysium: A wallet's positions and PnL on Elysium (GET /v1/wallet/{address}/pnl), pushed on subscribe, then the positions each block changes.
- HyperEVM: A wallet's positions and PnL on HyperEVM (GET /v1/wallet/{address}/pnl), pushed on subscribe, then the positions each block changes.
- Not on HyperCore: HyperCore trades on its order book: an account's positions and PnL move with its fills, pushed by the wallet channel (`hc.account`)
WebSocket channel pnl on wss://api.femtos.xyz/v1/ws
Parameters
| Param | In | Example or values | Meaning |
|---|---|---|---|
address | filter | 0x876f1301aaa8452ceb98201cd4407fa9510a8181 (Elysium); 0x5a69a60ca8a4d189855b33bd9f1bbe71095c1039 (HyperEVM) | The wallet: 0x, or a named wallet's handle |
layer | filter | elysium (Elysium); hyperevm (HyperEVM) | hyperevm or elysium |
status | filter | (optional) | all (default), open (held now) or closed: the positions sent |
limit | filter | 20 | Positions of the snapshot, by USD held, default 100 (1..500) |
includeSpam | filter | (optional) | true: spam tokens too, and in the PnL totals |
Subscribe
Elysium
{"op":"subscribe","channel":"pnl","filter":{"address":"0x876f1301aaa8452ceb98201cd4407fa9510a8181","layer":"elysium","limit":"20"}}HyperEVM
{"op":"subscribe","channel":"pnl","filter":{"address":"0x5a69a60ca8a4d189855b33bd9f1bbe71095c1039","layer":"hyperevm","limit":"20"}}Key: Authorization: Bearer $FEMTOS_KEY. Get a free key, or with no browser through agent onboarding.
Response fields
| Field | Type | Meaning |
|---|---|---|
snapshot: true | WalletPnl | the GET /v1/wallet/{address}/pnl?layer=<layer> answer (sort value): positions, cost basis, PnL, 1d / 7d / 30d / all totals, the block read |
data | PnlUpdate | the positions of the wallet that a block the indexer commits changed (a swap credited to the wallet, a balance moved), whole rows to replace by `token` (any position the filter keeps, not only the snapshot's page), the tokens gone, and the totals. Never sent for a price move: each row carries heldWithCost and costOfHeldUsd, unrealized PnL = heldWithCost × price − costOfHeldUsd at the client's price (`<layer>.prices`): {layer, address, height, asOf, positions, removed, totals} |
data.positions[] | object | The positions the block changed (a swap of the wallet, a balance moved), whole: replace each by `token`: {token, symbol, name, decimals, spam, spamReason, held, heldNative, heldWithCost, heldNoCost, priceUsd, valueUsd, …} |
data.removed | string[] | Positions gone (a token received, never swapped, no longer held) |
data.totals | object | Totals over every position of the wallet (not only the page): the last 24, 168, 720 UTC hours (1d, 7d, 30d) and all: {1d, 7d, 30d, all} |
billing | medium | the snapshot a subscribe asks for counts as GET /v1/wallet/{address}/pnl (medium); every other frame by its bytes (1 credit per 48 KiB) |
Related: Bridges & wallets
- Cross-layer wallet GET /v1/wallet/{address} Elysium, HyperCore, HyperEVM
One address (or a named wallet's handle) on HyperCore, HyperEVM and Elysium, plus its latest events. - Wallet stream WS wallet Elysium, HyperCore, HyperEVM
Every event of the three layers touching one address. - Wallet list stream WS wallets Elysium, HyperCore, HyperEVM
Every event of the three layers touching any of up to 100 addresses, in one subscription, each event tagged with its address. - HyperCore account GET /v1/hypercore/wallet/{address} HyperCore
One address's HyperCore account: perp value and margin, positions, spot balances. - Wallet open orders GET /v1/hypercore/wallet/{address}/orders HyperCore
One wallet's open orders: resting limit orders and trigger orders, on the main dex and every HIP-3 dex. - Wallet order history GET /v1/hypercore/wallet/{address}/orders/history HyperCore
One wallet's orders that left the book, newest first: how (filled, canceled, rejected) and why, the size filled and its average price. - Wallet fills GET /v1/hypercore/wallet/{address}/fills HyperCore
One wallet's HyperCore fills, newest first, with closed PnL, fees and the position before each. - Wallet fills per bar GET /v1/hypercore/wallet/{address}/fills/bars HyperCore
One wallet's fills on one market summed per bar: buys and sells with their average price, and the position after each bar. - Wallet funding GET /v1/hypercore/wallet/{address}/funding HyperCore
One wallet's funding payments, newest first: paid or received per perp and hour, with the position and the rate. - Swaps by wallet GET /v1/trades Elysium, HyperEVM
Every swap a wallet sent (or a pool’s, a token’s), newest first, filterable by token, side, size and time. - Transfers by wallet GET /v1/transfers Elysium, HyperEVM
ERC-20 transfers sent and received by a wallet, newest first, filterable by token, direction, size and time. - Wallet PnL GET /v1/wallet/{address}/pnl Elysium, HyperEVM
Any wallet on HyperEVM: per token balance, cost basis, realized and unrealized PnL, with 1d / 7d / 30d / all totals and win rate. - Portfolio value history GET /v1/wallet/{address}/value Elysium, HyperEVM
Any address on HyperEVM: its total USD value per 5 min (1d), hour (7d) or day (30d, all). - Wallet PnL curve GET /v1/hypercore/wallet/{address}/pnl HyperCore
One HyperCore wallet's PnL per hour or day: realized, fees, funding, net and cumulative, and its account value. - Was I sandwiched? GET /v1/wallet/{address}/mev Elysium
Every sandwich of a wallet’s swaps on Elysium: the bot, its two transactions, what the wallet lost. Free, no key. - Ledger stream WS hc.ledger HyperCore
Deposits, withdrawals, transfers and other non-trade balance moves. - Bridge movements GET /v1/bridges Elysium, HyperCore, HyperEVM
Matched HyperCore ↔ HyperEVM transfers with 24 h stats. - Bridge stream WS elysium.bridge | bridge.transfers Elysium, HyperCore, HyperEVM
Each HyperCore ↔ HyperEVM transfer, initiated then completed. - Bridge movements stream WS bridges.recent Elysium, HyperCore, HyperEVM
The GET /v1/bridges answer (movements newest first, 24 h stats), pushed on subscribe, then when a movement of the route changes state. - Bridge coverage GET /v1/bridges/coverage HyperCore, HyperEVM
Every HyperCore ↔ HyperEVM leg since our data starts, paired with its other leg: matched share per direction and token, why the others are not, latency.
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
Agent guide (agents.md)llms.txtOpenAPIMCP serverGet an API keyChangelog