# Launch holders · API reference · Femtos

> Every holder of a launched token, tagged dev or early buyer, with concentration. GET /v1/launches/{token}/holders on Elysium and HyperEVM: parameters, response fields and a live call per layer.

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  (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/launch-holders

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

Every holder of a launched token, tagged dev or early buyer, with concentration.

Layers: Elysium, HyperEVM. Not on HyperCore: served on Elysium and HyperEVM only. No data on Elysium yet: no Ascend launch on Elysium mainnet yet.
Page with live calls: https://femtos.xyz/reference/launch-holders?layer=<elysium|hyperevm>

| Param | In | Example or values | Meaning |
|---|---|---|---|
| `token` | path | `<token>` (Elysium); `<llToken>` (HyperEVM) | Launched token address |
| `limit` | query | `20` | Rows |
| `cursor` | query | (optional) | Next page: `next_cursor` of the previous answer |

Elysium:

```bash
curl -H "Authorization: Bearer $FEMTOS_KEY" "https://api.femtos.xyz/v1/launches/<token>/holders?limit=20"
```

HyperEVM:

```bash
curl -H "Authorization: Bearer $FEMTOS_KEY" "https://api.femtos.xyz/v1/launches/<llToken>/holders?limit=20"
```

| Field | Type | Meaning |
|---|---|---|
| `totalHolders` | int | Positive balances, system addresses excluded |
| `concentration` | object | {top1Share, top10Share, top20Share, top50Share, hhi, devShare, flaggedShare, heldShare} |
| `system` | object | {holders, amount, shareOfSupply} |
| `holders[]` | object | {rank, address, amount, shareOfSupply, firstSeenAt, lastActiveAt, tag, flags, entity} |
| `next_cursor` | string \| null | Opaque cursor of the next page: pass it as `cursor`, unchanged. null on the last page |

Next page: `cursor` = the `next_cursor` of the previous answer (https://femtos.xyz/agents.md#pagination).

## Related (Launches)

- [Launches](https://femtos.xyz/reference/launches.md) `GET /v1/launches`: Latest LiquidLaunch bonding-curve launches, newest first. (Elysium, HyperEVM)
- [Launches stream](https://femtos.xyz/reference/ws/launches.md) `WS elysium.launches · hyperevm.launches`: One message per new LiquidLaunch launch, the moment its block is indexed. (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 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