# Cross-layer wallet · Elysium API · Femtos

> One address (or a named wallet's handle) on HyperCore, HyperEVM and Elysium, plus its latest events.

- 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/elysium/wallet

## Cross-layer wallet — GET `/v1/wallet/{address}`

One address (or a named wallet's handle) on HyperCore, HyperEVM and Elysium, plus its latest events.

| Param | In | Example or values |
|---|---|---|
| `address` | path | `<creator>` |

```bash
curl -H "Authorization: Bearer $FEMTOS_KEY" "https://api.femtos.xyz/v1/wallet/<creator>"
```

| Field | Type | Meaning |
|---|---|---|
| `hypercore` | object | perp account, positions, spot balances (mainnet) |
| `hyperevm` | object | balances, NFTs, swaps / transfers scope, HyperCore ↔ HyperEVM bridges |
| `elysium` | object | token balances and NFTs (testnet), Orbit bridges |
| `bridges` | object | legs in flight and journeys Core → HyperEVM → Elysium (and back) |
| `*.freshness` | object | each section: head, headTime, lagMs, behindMs (as /api/status) |
| `recent[]` | object | {layer, kind: fill \| ledger \| bridge \| swap \| transfer, t, data} |
| `labels` | object | known addresses → label |

## Related (Bridge & wallet)

- [Bridge movements](https://femtos.xyz/elysium/bridge.md): HyperEVM ↔ Elysium movements with 24 h stats.
- [Bridge stream](https://femtos.xyz/elysium/ws-bridge.md): Each state change of a HyperEVM ↔ Elysium movement, live.
- [Wallet stream](https://femtos.xyz/elysium/ws-wallet.md): Every event of the three layers touching one address.
- [Token registry](https://femtos.xyz/elysium/coins.md): Links one token across Elysium, HyperEVM and HyperCore.
- [Coin detail](https://femtos.xyz/elysium/coin.md): One token: its links across layers, the markets it trades on, its 5 largest holders.

All Elysium endpoints: https://femtos.xyz/elysium.md