# Generate Your First Substreams

These tutorials demonstrate how to quickly index on-chain data for your application across various blockchains using the Substreams CLI.

Substreams data streams are available on the chains listed [here](/reference-material/chain-support/chains-and-endpoints.md). To support Substreams a [Firehose](https://thegraph.com/docs/en/new-chain-integration/) endpoint must be available.

If your blockchain is not supported, please ask in Discord. Then, consult the relevant ecosystem guide to get started using Substreams real-time data streams:

* [EVM](/tutorials/intro-to-tutorials/evm.md)
* [Solana](/tutorials/intro-to-tutorials/on-solana/solana.md)
* [NEAR](/tutorials/intro-to-tutorials/near.md)
* [Monad](/tutorials/intro-to-tutorials/monad.md)
* [Tron](/tutorials/intro-to-tutorials/tron.md)
* [Starknet](/tutorials/intro-to-tutorials/starknet.md)
* [Injective](/tutorials/intro-to-tutorials/injective.md)
* [Mantra](/tutorials/intro-to-tutorials/mantra.md)
* [Stellar](/tutorials/intro-to-tutorials/stellar.md)


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.substreams.dev/tutorials/intro-to-tutorials.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.