# Coin detail · Elysium API · Femtos

> One token: its links across layers, the markets it trades on, its 5 largest holders.

- 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/coin

## Coin detail — GET `/v1/coins/{layer}/{id}`

One token: its links across layers, the markets it trades on, its 5 largest holders.

| Param | In | Example or values |
|---|---|---|
| `layer` | path | `elysium` |
| `id` | path | `<token>` |
| `includeSpam` | query | `(empty)`, `true` |

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

| Field | Type | Meaning |
|---|---|---|
| `coin` | object | {id, symbol, name, decimals, totalSupply, priceUsd, links, spam, spamReason} |
| `markets[]` | Market | markets where it is base or quote, most traded first |
| `holders` | object | 5 largest holders, or {unavailable} |

## 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.
- [Cross-layer wallet](https://femtos.xyz/elysium/wallet.md): One address (or a named wallet's handle) on HyperCore, HyperEVM and Elysium, plus its latest events.
- [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.

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