# Launch timeline · Elysium API · Femtos

> The whole life of a launch as ordered events with running state.

- 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/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/timeline

## Launch timeline — GET `/v1/launches/{token}/timeline`

The whole life of a launch as ordered events with running state.

| Param | In | Example or values |
|---|---|---|
| `token` | path | `<token>` |

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

| Field | Type | Meaning |
|---|---|---|
| `launch` | object | {t, block, tx, creator, supplySeeded, devBuyTokens} |
| `events[]` | object | launch \| swap \| transfer, chain order |
| `events[].holders · top10Share` | int · number | running state after the event |
| `events[].mcapUsd · volumeUsd` | decimal | running market cap, cumulated volume |
| `current` | object | figures right now |
| `graduation` | object | {mirror: HyperEVM token \| null, core: HyperCore spot \| null} |
| `truncated` | boolean | over 5,000 swaps: replay stops there |

## Related (Lifecycle)

- [Lifecycle stage changes](https://femtos.xyz/elysium/ws-ascend-lifecycle.md): A message when a launched token reaches its next stage: listing desk, HyperEVM mirror, HyperCore spot, perp.
- [Token across layers](https://femtos.xyz/elysium/token-lifecycle.md): One token from its Elysium launch to its HyperEVM mirror, HyperCore spot and perps, each link proven or marked inferred.

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