# Configuring Hashio RPC endpoints

[Hashio](https://swirldslabs.com/hashio/) is a public RPC endpoint hosted by Swirlds Labs. As a *public* endpoint, it:

* Is free to use
* Does not have any sign-up requirements
* Has significantly restrictive rate limits

While this combination may be considered less reliable, it offers the highest levels of ease of use among RPC endpoints.

To connect to the Hedera networks via Hashio, simply use this URL when initializing the wallet or web3 provider instance:

{% tabs %}
{% tab title="Hedera Mainnet" %}

```
https://mainnet.hashio.io/api
```

{% endtab %}

{% tab title="Hedera Testnet" %}

```
https://testnet.hashio.io/api
```

{% endtab %}

{% tab title="Hedera Previewnet" %}

```
https://previewnet.hashio.io/api
```

{% endtab %}
{% endtabs %}

No further settings or configurations are needed!


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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://dev.uniultra.xyz/docs/tutorials/more-tutorials/json-rpc-connections/hashio.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.