# KOL trades · HyperCore API · Femtos

> The latest fills of the named wallets, newest first, with who traded.

- 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` (or `X-API-KEY: $FEMTOS_KEY`). Free key: https://femtos.xyz/accounts/ (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/hypercore/kol-activity

## KOL trades — GET `/v1/kols/activity`

The latest fills of the named wallets, newest first, with who traded.

| Param | In | Example or values |
|---|---|---|
| `minNotional` | query | `10000` |
| `entity` | query | (optional) |
| `limit` | query | `50` |

```bash
curl -H "Authorization: Bearer $FEMTOS_KEY" "https://api.femtos.xyz/v1/kols/activity?minNotional=10000&limit=50"
```

| Field | Type | Meaning |
|---|---|---|
| `rows[]` | KolItem | {t, wallet, entity, coin, side, px, sz, notional, dir, closedPnl, tid} |
| `hash · block` | string · int | source: the fill’s transaction and block |
| `next · before` | string | cursor <time ms>:<block>:<event> of the next page |

## Related (Named wallets)

- [KOL leaderboard](https://femtos.xyz/hypercore/kols.md): KOLs, traders and funds ranked by their HyperCore PnL, volume and open positions.
- [KOL stream](https://femtos.xyz/hypercore/ws-kols.md): Every fill, liquidation, EVM swap, transfer and bridge leg of a named wallet, live.
- [Named wallets](https://femtos.xyz/hypercore/entities.md): Every named entity, its X account, kinds, sources and wallets.
- [One entity](https://femtos.xyz/hypercore/entity.md): One named entity: its wallets on the three layers and 30 days of HyperCore trading.

All HyperCore endpoints: https://femtos.xyz/hypercore.md