# One entity · API reference · Femtos

> One named entity: its wallets on the three layers and 30 days of HyperCore trading. GET /v1/entities/{id} on Elysium, HyperCore and HyperEVM: parameters, response fields and a live call per layer.

- Base URL: `https://api.femtos.xyz/v1` (REST) · `wss://api.femtos.xyz/v1/ws` (WebSocket) · MCP: `https://api.femtos.xyz/mcp`
- Auth: `Authorization: Bearer $FEMTOS_KEY`. Free key: https://femtos.xyz/account/new (browser), or with
  no browser: `GET https://femtos.xyz/accounts/agent/challenge`, solve its proof of work, then `POST https://femtos.xyz/accounts/agent/signup`
  (https://femtos.xyz/agents.md#agent-onboarding)
- Decimals are exact strings, times Unix milliseconds, addresses lowercase `0x`
- Whole API in one file: https://femtos.xyz/agents.md · OpenAPI: https://api.femtos.xyz/v1/openapi.json · Index: https://femtos.xyz/llms.txt
- Page with live calls: https://femtos.xyz/reference/entity

## One entity — GET `/v1/entities/{id}`

One named entity: its wallets on the three layers and 30 days of HyperCore trading.

Layers: Elysium, HyperCore, HyperEVM.
Page with live calls: https://femtos.xyz/reference/entity?layer=<elysium|hypercore|hyperevm>

| Param | In | Example or values | Meaning |
|---|---|---|---|
| `id` | path | `loraclexyz` (Elysium, HyperEVM); `abraxascapital` (HyperCore) | Entity id |

Elysium, HyperEVM:

```bash
curl -H "Authorization: Bearer $FEMTOS_KEY" "https://api.femtos.xyz/v1/entities/loraclexyz"
```

HyperCore:

```bash
curl -H "Authorization: Bearer $FEMTOS_KEY" "https://api.femtos.xyz/v1/entities/abraxascapital"
```

| Field | Type | Meaning |
|---|---|---|
| `totals` | object | {hypercoreAccountValue, hypercoreSpotUsd, hyperevmUsd, openPerpNotional} |
| `hypercore30d` | object \| null | {fills, volume, realizedPnl, fees, netPnl, winRate} over 30 days |
| `wallets` | object[] | Its wallets: HyperCore account, HyperEVM / Elysium balances, recent moves of each |
| `entity` | object | {id, name, x, kinds, confidence, aliases, sources, wallets, smartMoney} |

## Related (Named wallets)

- [Named wallets](https://femtos.xyz/reference/entities.md) `GET /v1/entities`: Every named entity, its X account, kinds, sources and wallets. (Elysium, HyperCore, HyperEVM)
- [Entity proofs](https://femtos.xyz/reference/entity-graph.md) `GET /v1/entities/{id}/graph`: How each wallet of an entity was found: the path of links back to a public source and their proofs. (Elysium, HyperCore, HyperEVM)
- [KOL leaderboard](https://femtos.xyz/reference/kols.md) `GET /v1/kols/leaderboard`: KOLs, traders and funds ranked by their HyperCore PnL, volume and open positions. (Elysium, HyperCore, HyperEVM)
- [KOL moves](https://femtos.xyz/reference/kol-activity.md) `GET /v1/kols/activity`: The latest fills of the named wallets, newest first, with who traded. (Elysium, HyperCore, HyperEVM)
- [KOL stream](https://femtos.xyz/reference/ws/kols.md) `WS kol.activity`: Every fill, liquidation, EVM swap, transfer and bridge leg of a named wallet, live. (Elysium, HyperCore, HyperEVM)

Every page: https://femtos.xyz/reference.md