# FAQ

### What data sources do you have?

Spice currently supports [**Ethereum**](https://docs.spice.ai/~/changes/fl1GUvkHE2461izfYRLa/reference/sql-query-tables) (including [**Beacon**](https://docs.spice.ai/~/changes/fl1GUvkHE2461izfYRLa/reference/sql-query-tables/goerli/beacon-chain-tables) & [**Goerli**](https://docs.spice.ai/~/changes/fl1GUvkHE2461izfYRLa/reference/sql-query-tables/goerli)), [**Bitcoin**](https://docs.spice.ai/~/changes/fl1GUvkHE2461izfYRLa/reference/sql-query-tables/bitcoin), and [**Polygon**](https://docs.spice.ai/~/changes/fl1GUvkHE2461izfYRLa/reference/sql-query-tables/polygon) blockchain data along with [**ENS**](https://docs.spice.ai/~/changes/fl1GUvkHE2461izfYRLa/reference/sql-query-tables/ethereum/token-tables-1), **DeFi/DEX** ([**Sushiswap**](https://docs.spice.ai/~/changes/fl1GUvkHE2461izfYRLa/reference/sql-query-tables/ethereum/sushiswap-tables)**,** [**Uniswap-V2**](https://docs.spice.ai/~/changes/fl1GUvkHE2461izfYRLa/reference/sql-query-tables/ethereum/uniswap-v2-tables)**,** [**Uniswap-V3**](https://docs.spice.ai/~/changes/fl1GUvkHE2461izfYRLa/reference/sql-query-tables/ethereum/uniswap-v2-tables)**,** [**Aave**](https://docs.spice.ai/~/changes/fl1GUvkHE2461izfYRLa/reference/sql-query-tables/ethereum/aave-v2-tables)), [**NFT**](https://docs.spice.ai/~/changes/fl1GUvkHE2461izfYRLa/tutorials-and-guides/broken-reference) and [**token**](https://docs.spice.ai/~/changes/fl1GUvkHE2461izfYRLa/reference/sql-query-tables/ethereum/token-tables) specific data.

Digital asset/cryptocurrency [spot/latest](https://docs.spice.ai/~/changes/fl1GUvkHE2461izfYRLa/api/prices) and full [historical prices](https://docs.spice.ai/~/changes/fl1GUvkHE2461izfYRLa/api/prices) data is available from leading exchanges including Coinbase, Gemini, and Binance.

We are adding more chains and contracts prioritized by user feedback every month.

For the all-up list, see [Datasets](https://docs.spice.ai/~/changes/fl1GUvkHE2461izfYRLa/getting-started/datasets) and follow the [Release notes](https://docs.spice.ai/~/changes/fl1GUvkHE2461izfYRLa/reference/release-notes) for updates.

### How much does Spice cost?

Spice is currently in beta and it's free to [get an API key](https://spice.xyz), although due to demand there is waitlist.

We plan to always have a free tier and offer free APIs, like the [Gas Fees API](https://docs.spice.ai/~/changes/fl1GUvkHE2461izfYRLa/api/ethereum/gas-fees).

For customers who need higher request or query limits, service guarantees, or priority support we  offer high-value paid tiers based on usage.

### What level of support do you offer?

We offer [best-effort support](https://github.com/spicehq/cloud-docs/blob/trunk/broken-reference/README.md) in Discord.

If you'd like higher-priority support or are interested in becoming a [Design Partner](https://www.craft.do/s/bgJFtYzSZwuFXD) with dedicated, enterprise-grade support with an SLA, please get in touch.

### What SQL query engine/language do you support?

We currently use an [Apache Calcite](https://calcite.apache.org/) based query engine and support the ANSI SQL standard.

[Spice Firecache](https://docs.spice.ai/~/changes/fl1GUvkHE2461izfYRLa/reference/specifications/dataset-and-view-yaml-specification/firecache) is built on [DuckDB](https://duckdb.org/) and uses the DuckDB SQL dialect.

### Can you add \<table> / dataset or index a specific on-chain contract?

Most likely, yes! Hit us up on Discord and we can work with you to add new views/tables or index new contracts. The ability to create private custom tables is on our roadmap.

### Do you support WebSockets or other streaming?

WebSocket support is available for [Design Partners](https://www.craft.do/s/bgJFtYzSZwuFXD). Apache Arrow over gRPC streaming is on our roadmap.

### Do you support alerting?

Not yet, but it is on our roadmap. You can also build your own custom alerting using [Spice Functions](https://docs.spice.ai/~/changes/fl1GUvkHE2461izfYRLa/portal/apps/spice-functions).

### Do you support JDBC/ODBC/ADBC?

Not yet, but it is on our roadmap.