# Developing Substreams

These how-to guides walk through creating a Substreams that uses raw blockchain data to index your dapp. The application includes using Rust and Protobuf to extract, transform, and load the data.

{% hint style="warning" %}
**Important***:* These how-to guides are in-depth walkthroughs of building highly performance indexers for your dapp. Less experienced users may want to reference the [Tutorials](/tutorials/intro-to-tutorials.md) for a quick start.
{% endhint %}

Choose your ecosystem to get started:

* [General](/how-to-guides/develop-your-own-substreams/general/local-development.md) - Cross-chain topics including local development, Rust, Protobuf, and agent skills
* [EVM](/how-to-guides/develop-your-own-substreams/on-evm/exploring-ethereum.md)
* [Solana](/how-to-guides/develop-your-own-substreams/solana.md)
* [Cosmos](/how-to-guides/develop-your-own-substreams/on-cosmos/injective/block-stats.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/how-to-guides/develop-your-own-substreams.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.