# Launches stream · API reference · Femtos

> One message per new LiquidLaunch launch, the moment its block is indexed. WebSocket channels elysium.launches · hyperevm.launches on Elysium 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/ws/launches

WebSocket: get a ticket (`POST https://api.femtos.xyz/v1/ws-ticket` with your key), connect to `wss://api.femtos.xyz/v1/ws?ticket=$TICKET`, send the frame below; the first message has `"snapshot": true`. Details: https://femtos.xyz/agents.md#websocket

## Launches stream — WS `elysium.launches · hyperevm.launches`

- Elysium: One message per new launch, the moment its block is indexed.
- HyperEVM: One message per new LiquidLaunch launch, the moment its block is indexed.

Layers: Elysium, HyperEVM. Not on HyperCore: a channel of Elysium and HyperEVM only.
Page with live calls: https://femtos.xyz/reference/ws/launches?layer=<elysium|hyperevm>

| Param | In | Example or values | Meaning |
|---|---|---|---|
| `launchpad` | filter | (optional) | Launchpad name or address, e.g. ascend (Elysium) |
| `include_spam` | filter | `(empty)`, `true` | true: also the rows of spam tokens (flagged `spam`), left out by default |

Elysium:

```json
{"op":"subscribe","channel":"elysium.launches","filter":{}}
```

HyperEVM:

```json
{"op":"subscribe","channel":"hyperevm.launches","filter":{}}
```

| Field | Type | Meaning |
|---|---|---|
| `snapshot: true` | LaunchRow[] | last 50 launches at subscribe, chronological (Elysium) |
| `data` | LaunchRow | one new launch (same shape as GET /api/launches), as soon as its block is indexed: {token, symbol, name, decimals, launchpad, launchpadName, pair, poolId, creator, quote, quoteSymbol, launchedAt, …} (Elysium) |
| `ts.source` | int | block time of the launch (ms) (Elysium) |
| `snapshot: true` | LaunchRow[] | last 50 LiquidLaunch launches at subscribe, chronological (HyperEVM) |
| `data` | LaunchRow | one new launch (same shape as GET /api/launches): {token, symbol, name, decimals, launchpad, launchpadName, pair, poolId, creator, quote, quoteSymbol, launchedAt, …} (HyperEVM) |

## Related (Launches)

- [Launches](https://femtos.xyz/reference/launches.md) `GET /v1/launches`: Latest LiquidLaunch bonding-curve launches, newest first. (Elysium, HyperEVM)
- [Launch detail & signals](https://femtos.xyz/reference/signals.md) `GET /v1/launches/{token}`: Metrics, dev wallet, early buyers and risk signals of one launch. (Elysium, HyperEVM)
- [Launch holders](https://femtos.xyz/reference/launch-holders.md) `GET /v1/launches/{token}/holders`: Every holder of a launched token, tagged dev or early buyer, with concentration. (Elysium, HyperEVM)
- [Launch timeline](https://femtos.xyz/reference/timeline.md) `GET /v1/launches/{token}/timeline`: The whole life of a launch as ordered events with running state. (Elysium, HyperEVM)
- [New tokens](https://femtos.xyz/reference/new-tokens.md) `GET /v1/tokens/new`: Every ERC-20 created on HyperEVM, newest first, with its first pool and market figures. (Elysium, HyperEVM)
- [New tokens stream](https://femtos.xyz/reference/ws/new-tokens.md) `WS elysium.tokens.new · hyperevm.tokens.new`: One message per new token as its block is indexed, and another when its first pool opens. (Elysium, HyperEVM)
- [New pools](https://femtos.xyz/reference/new-pools.md) `GET /v1/pools/new`: Every new pair or pool on HyperEVM, from every discovered factory and PoolManager, newest first. (Elysium, HyperEVM)
- [New pools stream](https://femtos.xyz/reference/ws/new-pools.md) `WS elysium.pools.new · hyperevm.pools.new`: One message per new pool, the moment its block is indexed. (Elysium, HyperEVM)
- [Ascend swaps stream](https://femtos.xyz/reference/ws/ascend-swaps.md) `WS ascend.swaps`: Every swap of every Ascend pool, one message per block. (Elysium)
- [Ascended transitions](https://femtos.xyz/reference/ws/ascend-status.md) `WS ascend.status`: A message when a launch crosses your thresholds, in the block where it happens. (Elysium)
- [Lifecycle stage changes](https://femtos.xyz/reference/ws/ascend-lifecycle.md) `WS ascend.lifecycle`: A message when a launched token reaches its next stage: listing desk, HyperEVM mirror, HyperCore spot, perp. (Elysium)

Every page: https://femtos.xyz/reference.md