# Somnia Reactivity

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**Reactivity is currently only available on TESTNET**
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Somnia Reactivity is a native toolkit for building event-driven dApps on the Somnia chain. Events and blockchain state is pushed directly to your TypeScript or Solidity apps in one atomic notification without polling.

#### Key Benefits

* **Real-Time Efficiency**: Notifications include events + state from the same block, slashing RPC calls and latency.
* **Cross-Environment**: Seamless for off-chain (WebSocket) and on-chain (EVM invocations).
* **Scalable Subscriptions**: Customizable for filters, guarantees, and coalescing to fit your app's needs.

TL;DR: Build reactive dApps that respond instantly to on-chain activity, reducing complexity and costs vs. traditional EVM setups.


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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.somnia.network/developer/reactivity.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.