# Named wallets · API reference · Femtos

> Every named entity, its X account, kinds, sources and wallets. GET /v1/entities 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/entities

## Named wallets — GET `/v1/entities`

Every named entity, its X account, kinds, sources and wallets.

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

| Param | In | Example or values | Meaning |
|---|---|---|---|
| `q` | query | (optional) | Name, X handle, alias, wallet address or handle |
| `kind` | query | (optional) | Entities: named (people, funds, pseudonyms from public sources), cluster (anonymous smart-money clusters: HyperCore traders selected on their results), all, or a kind it contains (whale, market maker…). Default: all |
| `confidence` | query | `(empty)`, `high`, `medium`, `low`, `unrated` | Entities with at least one wallet of this confidence |
| `via` | query | `(empty)`, `list`, `bridge`, `subaccount`, `transfer`, `vault-leader`, `self-declared`, `smart-money`, `smart-money-link` | Entities with at least one wallet found this way (`via` of the wallets) |
| `sort` | query | `default`, `wallets`, `name`, `pnl` | default: the registry order (our research first); wallets: most wallets first; name; pnl: smart-money net PnL first |
| `cursor` | query | (optional) | Next page: `next_cursor` of the previous answer |

Elysium, HyperCore, HyperEVM:

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

| Field | Type | Meaning |
|---|---|---|
| `entities[]` | object | {id, name, x, kinds, confidence, aliases, sources, wallets, smartMoney} |
| `entities[].wallets[].address` | string | Wallet: 0x address, or a named wallet's handle |
| `entities[].wallets[].via` | list \| bridge \| subaccount \| transfer \| vault-leader \| self-declared \| smart-money \| smart-money-link | How the wallet was found: list (a public list or our research names it), bridge (cross-chain bridges with a wallet of the entity, Solana ones included), subaccount (a HyperCore sub-account), transfer (HyperCore sends both ways), vault-leader (leads the vault), self-declared (verified on Farcaster by the X account), smart-money (selected on its HyperCore results), smart-money-link (linked to such a wallet) |
| `total` | int | Entities matching |
| `facets` | object | Counts over the entities matching `q` and `kind`, before the `confidence` and `via` filters: what each filter value would select: {entities, wallets, groups, confidence, via} |
| `next_cursor` | string \| null | Opaque cursor of the next page: pass it as `cursor`, unchanged. null on the last page |

Next page: `cursor` = the `next_cursor` of the previous answer (https://femtos.xyz/agents.md#pagination).

## Related (Named wallets)

- [One entity](https://femtos.xyz/reference/entity.md) `GET /v1/entities/{id}`: One named entity: its wallets on the three layers and 30 days of HyperCore trading. (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