# Token overview · Elysium API · Femtos

> One token across all its pools: price, FDV, market cap, liquidity, windows, holders, top pools.

- 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/token-overview

## Token overview — GET `/v1/tokens/{address}`

One token across all its pools: price, FDV, market cap, liquidity, windows, holders, top pools.

| Param | In | Example or values | Meaning |
|---|---|---|---|
| `address` | path | `<token>` | Token address |
| `layer` | query | `elysium` | EVM layer |

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

| Field | Type | Meaning |
|---|---|---|
| `layer` | string | Layer |
| `token` | object | Token metadata from the indexer: {address, symbol, name, decimals, totalSupply, creator, createdAt, createdBlock, logo, description, socials, family, …} |
| `price` | object | The price as GET /prices answers it: {priceUsd, source, t, pool, market, block, tx, logIndex} |
| `fdvUsd` | decimal \| null | totalSupply × price |
| `mcapUsd` | decimal \| null | circulatingSupply × price |
| `circulatingSupply` | decimal \| null | totalSupply minus what the zero and 0x…dead addresses hold |
| `liquidityUsd` | decimal \| null | Σ of the measured liquidity of its pools (twice the smaller side of each) |
| `liquidity` | object | {pools, unmeasured} |
| `windows` | object | Rolling windows ending at windowsEnd: 5m / 1h / 6h from the swaps themselves, 24h from hourly candles (the current hour included), over every pool of the token (spam pools left out unless the token is spam): {5m, 1h, 6h, 24h} |
| `windowsEnd` | ms | End of the windows (the indexed head while the layer syncs) |
| `holders` | object \| null | {count, top10Share}: positive balances, system addresses excluded (as /holders); null when it cannot answer: {count, top10Share} |
| `pools` | object | {count, active24h, reference, top} |
| `createdAt` | int \| null | Creation time (Unix ms) |
| `creator` | string \| null | Deployer |
| `asOf` | int \| null | Time of `height`: the layer head the answer is cut at (EVM: indexed head; HyperCore: ingested head) (Unix ms) |
| `height` | int \| null | Head block of the layer the answer is cut at |
| `testnet` | boolean | Elysium testnet: USD values from testnet pools, nominal |
| `syncing` | true | Present while the layer syncs: data only up to dataUntil |
| `dataUntil` | int \| null | Indexed head time while the layer syncs (Unix ms) |

## Related (Market data)

- [Candles](https://femtos.xyz/elysium/candles.md): OHLCV of one pool in pair price, USD and market cap, ascending, UTC-aligned.
- [Forming candle](https://femtos.xyz/elysium/ws-candles.md): The forming candle, pushed once per block where it changes.
- [Trades](https://femtos.xyz/elysium/trades.md): Latest swaps of one pool, newest first.
- [Trades stream](https://femtos.xyz/elysium/ws-trades.md): The swaps of one pool, one message per block that has some.
- [Daily token volume](https://femtos.xyz/elysium/volume.md): USD swap volume of a token per UTC day, both sides of every priced swap. Testnet pool prices.
- [Token transfers](https://femtos.xyz/elysium/transfers.md): ERC-20 Transfer events of one token, newest first.
- [Liquidity events](https://femtos.xyz/elysium/liquidity.md): Liquidity added to and removed from one pool, newest first.
- [Swaps by wallet](https://femtos.xyz/elysium/wallet-trades.md): Every swap a wallet sent (or a pool’s, a token’s), newest first, filterable by token, side, size and time.
- [Transfers by wallet](https://femtos.xyz/elysium/wallet-transfers.md): ERC-20 transfers sent and received by a wallet, newest first, filterable by token, direction, size and time.
- [Pool detail](https://femtos.xyz/elysium/pool.md): One pool: dex, fee, tokens, liquidity in USD, depth, 5m to 24h activity, top LPs.
- [Transaction](https://femtos.xyz/elysium/tx.md): One transaction: status, gas, decoded transfers, swaps and liquidity, bridge legs and journey.
- [Token prices](https://femtos.xyz/elysium/prices.md): USD price of up to 100 tokens in one call, each with its source and provenance.
- [Price history](https://femtos.xyz/elysium/price-history.md): USD closes per unit of up to 25 tokens over a window, or the price of 100 tokens at one time (at=).
- [Token candles](https://femtos.xyz/elysium/token-candles.md): OHLCV of a token in USD through its reference pool, the most liquid one.
- [Token metadata](https://femtos.xyz/elysium/tokens-batch.md): Metadata of up to 100 tokens: supply, creator, logo and socials when indexed, family, spam. Also POST with a JSON body.

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