fix: broken hashio links and updated any outdated content

docs.json

@@ -263,6 +263,14 @@
                       "hedera/tutorials/more-tutorials/HSM-signing/azure-key-vault",
                       "hedera/tutorials/more-tutorials/HSM-signing/gcp-kms"
                     ]
+                  },
+                   {
+                    "group": "JSON RPC Connections",
+                    "pages": [
+                      "hedera/tutorials/more-tutorials/json-rpc-connections",
+                      "hedera/tutorials/more-tutorials/json-rpc-connections/hashio",
+                      "hedera/tutorials/more-tutorials/json-rpc-connections/validation-cloud"
+                    ]
                   }
                 ]
               },

hedera/getting-started-evm-developers/deploy-a-smart-contract-with-hardhat.mdx

@@ -462,10 +462,10 @@ The plugin uploads the source code and metadata to Sourcify and you should recei
   <Card title="Editor: Krystal, Senior DX Engineer">
     [Github](https://github.com/theekrystallee) | [X](https://x.com/theekrystallee)
   </Card>
-  <Card title="Editor: Logan, Software Engineer II" arrow>
+  <Card title="Editor: Logan, Senior Software Engineer" arrow>
     [GitHub](https://github.com/quiet-node) | [LinkedIn](https://www.linkedin.com/in/logann131/)
   </Card>
-  <Card title="Editor: Jake, DevRel Engineer" arrow>
+  <Card title="Editor: Jake, Senior DevRel Engineer" arrow>
     [GitHub](https://github.com/jaycoolh) | [X](https://x.com/jaycoolh)
   </Card>
    <Card title="Editor: Michiel, DevRel Engineer" arrow>

hedera/tutorials/more-tutorials/json-rpc-connections.mdx

@@ -1,34 +1,70 @@
 ---
 title: "How to Connect to Hedera Networks Over RPC"
+description: "Compare the available JSON-RPC providers for Hedera and pick the right endpoint for your project."
+mode: "wide"
 ---
 
-There are four options to establish a connection to Hedera Networks. Validation Cloud, Arkhia, and Hashio are all managed JSON-RPC providers; the Hedera JSON-RPC Relay is for running your own local JSON-RPC instance. Hashio is a Hedera community service offered by [Hashgraph](https://www.hashgraph.com/) that has limited capabilities.
+The [JSON-RPC Relay](https://github.com/hiero-ledger/hiero-json-rpc-relay) is the open-source service that bridges EVM-style JSON-RPC clients (MetaMask, ethers.js, web3.js, Hardhat, Foundry, viem, etc.) to the Hedera network. You have three ways to access it: use the free public instance ([Hashio](/hedera/tutorials/more-tutorials/json-rpc-connections/hashio)), use a managed third-party provider, or run your own instance.
 
-**➡** [**Hashio**](/hedera/tutorials/more-tutorials/json-rpc-connections/hashio)
+## Choose a connection option
 
-**➡** [**Hiero JSON-RPC Relay**](https://github.com/hiero-ledger/hiero-json-rpc-relay)
+<CardGroup cols={2}>
+  <Card title="Hashio" icon="bolt" href="/hedera/tutorials/more-tutorials/json-rpc-connections/hashio">
+    Free public Hiero JSON-RPC Relay instance hosted by Hashgraph. No sign-up required. Best for prototyping and tutorials. Rate-limited.
+  </Card>
 
-**➡** [**Validation Cloud**](/hedera/tutorials/more-tutorials/json-rpc-connections/validation-cloud)
+  <Card title="Validation Cloud" icon="cloud" href="/hedera/tutorials/more-tutorials/json-rpc-connections/validation-cloud">
+    Freemium managed JSON-RPC and Mirror Node service. Requires an account but no credit card. Scales for production workloads.
+  </Card>
 
-**➡** [**QuickNode**](https://www.quicknode.com/docs/hedera) **(docs)**
+  <Card title="QuickNode" icon="rocket" href="https://www.quicknode.com/docs/hedera">
+    Commercial JSON-RPC provider with global edge infrastructure and SLAs. Best for high-throughput production apps.
+  </Card>
 
-<Columns cols={2}>
+  <Card title="Self-host the Relay" icon="server" href="https://github.com/hiero-ledger/hiero-json-rpc-relay">
+    Run your own instance of the open-source Hiero JSON-RPC Relay for full control over rate limits, caching, and infrastructure.
+  </Card>
+</CardGroup>
+
+## Network support
+
+| Option                          | Mainnet | Testnet | Previewnet | Sign-up |
+| ------------------------------- | :-----: | :-----: | :--------: | :-----: |
+| **Hashio** (public Hiero Relay) |    ✅    |    ✅   |    ✅     |   ❌    |
+| **Validation Cloud**            |    ✅    |    ✅   |    ❌     |   ✅    |
+| **QuickNode**                   |    ✅    |    ✅   |    ❌     |   ✅    |
+| **Self-hosted Relay**           |    ✅    |    ✅   |    ✅     |    —    |
+
+## Network reference
+
+| Network        | Chain ID (decimal) | Chain ID (hex) | Hashio endpoint                                                        |
+| -------------- | :----------------: | :------------: | ---------------------------------------------------------------------- |
+| **Mainnet**    | `295`                | `0x127`        | [`https://mainnet.hashio.io/api`](https://mainnet.hashio.io/api)       |
+| **Testnet**    | `296`                | `0x128`        | [`https://testnet.hashio.io/api`](https://testnet.hashio.io/api)       |
+| **Previewnet** | `297`                | `0x129`        | [`https://previewnet.hashio.io/api`](https://previewnet.hashio.io/api) |
+
+<Warning>
+  **Hashio is for development and testing purposes only.** Production use cases are strongly encouraged to use [commercial-grade JSON-RPC relays](/hedera/core-concepts/smart-contracts/json-rpc-relay#community-hosted-json-rpc-relays) or host their own instance of the [Hiero JSON-RPC Relay](https://github.com/hiero-ledger/hiero-json-rpc-relay).
+</Warning>
+
+## Additional resources
+
+* [JSON-RPC Relay overview](/hedera/core-concepts/smart-contracts/json-rpc-relay)
+* [Community-hosted JSON-RPC relays](/hedera/core-concepts/smart-contracts/json-rpc-relay#community-hosted-json-rpc-relays)
+* [Add Hedera to MetaMask](/hedera/getting-started-evm-developers/add-hedera-to-metamask)
+* [How to connect MetaMask to Hedera](/hedera/tutorials/smart-contracts/how-to-connect-metamask-to-hedera)
+* [Hiero JSON-RPC Relay on GitHub](https://github.com/hiero-ledger/hiero-json-rpc-relay)
+
+---
 
+<Columns cols={2}>
   <Card title="Writer: Brendan, DevRel Engineer">
     [GitHub](https://github.com/bguiz) | [Blog](https://blog.bguiz.com/)
   </Card>
   <Card title="Writer: Aaron, Validation Cloud">
     [GitHub](https://github.com/aaron-cottrell-vc)
   </Card>
   <Card title="Editor: Krystal, Senior DX Engineer">
-    [GitHub](https://github.com/theekrystallee) | [X](https://X.com/theekrystallee)
+    [GitHub](https://github.com/theekrystallee) | [X](https://X.com/theekrystallee) | [LinkedIn](https://linkedin.com/in/theekrystallee)
   </Card>
 </Columns>
-
-<Warning>
-  **Please note**: Hashio is For development and testing purposes only.
-  Production use cases are strongly encouraged to use* [*commercial-grade
-  JSON-RPC relays*](hedera/core-concepts/smart-contracts/json-rpc-relay) *or
-  host their own instance of the* [*Hiero JSON-RPC
-  Relay*](https://github.com/hiero-ledger/hiero-json-rpc-relay)*.*
-</Warning>

hedera/tutorials/more-tutorials/json-rpc-connections/hashio.mdx

@@ -2,27 +2,60 @@
 title: "Configuring Hashio RPC endpoints"
 ---
 
-How to configure a JSON-RPC endpoint that enables communication between
-EVM-compatible developer tools using Hashio
+How to configure a JSON-RPC endpoint that enables communication between EVM-compatible developer tools using Hashio.
 
-[Hashio](https://www.hashgraph.com/hashio/)
-is a public RPC endpoint hosted by Swirlds Labs. As a *public* endpoint, it:
+Hashio is a public RPC endpoint hosted by [Hashgraph](https://www.hashgraph.com/) that runs an instance of the [Hiero JSON-RPC Relay](https://github.com/hiero-ledger/hiero-json-rpc-relay). 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.
+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:
+To connect to the Hedera networks via Hashio, simply use one of these URLs when initializing the wallet or web3 provider instance:
 
 <CodeGroup>
+  ```text Mainnet
+  https://mainnet.hashio.io/api
+  ```
+
+  ```text Testnet
+  https://testnet.hashio.io/api
+  ```
+
+  ```text Previewnet
+  https://previewnet.hashio.io/api
+  ```
 </CodeGroup>
 
+The corresponding chain IDs are:
 
-**Please note**: Hashio is
-For development and testing purposes only. Production use cases are strongly encouraged to use [commercial-grade JSON-RPC relays](/hedera/core-concepts/smart-contracts/json-rpc-relay#community-hosted-json-rpc-relays) or host their own instance of the [Hedera JSON-RPC Relay](https://github.com/hashgraph/hedera-json-rpc-relay?tab=readme-ov-file#hedera-json-rpc-relay).
+| Network        | Chain ID (decimal)   | Chain ID (hex) |
+| -------------- | :------------------: | :------------: |
+| **Mainnet**    | `295`                | `0x127`        |
+| **Testnet**    | `296`                | `0x128`        |
+| **Previewnet** | `297`                | `0x129`        |
 
 No further settings or configurations are needed!
+
+<Warning>
+  **Please note**: Hashio is for development and testing purposes only. Production use cases are strongly encouraged to use [commercial-grade JSON-RPC relays](/hedera/core-concepts/smart-contracts/json-rpc-relay#community-hosted-json-rpc-relays) or host their own instance of the [Hiero JSON-RPC Relay](https://github.com/hiero-ledger/hiero-json-rpc-relay).
+</Warning>
+
+## Additional resources
+
+* [Hiero JSON-RPC Relay repository](https://github.com/hiero-ledger/hiero-json-rpc-relay)
+* [JSON-RPC Relay overview](/hedera/core-concepts/smart-contracts/json-rpc-relay)
+* [How to connect MetaMask to Hedera](/hedera/tutorials/smart-contracts/how-to-connect-metamask-to-hedera)
+* [Add Hedera to MetaMask](/hedera/getting-started-evm-developers/add-hedera-to-metamask)
+
+---
+
+<Columns cols={2}>
+  <Card title="Editor: Krystal, Senior DX Engineer">
+    [GitHub](https://github.com/theekrystallee) | [X](https://X.com/theekrystallee) | [LinkedIn](https://linkedin.com/in/theekrystallee)
+  </Card>
+  <Card title="Editor: Logan, Senior Software Engineer" arrow>
+    [GitHub](https://github.com/quiet-node) | [LinkedIn](https://www.linkedin.com/in/logann131/)
+  </Card>
+</Columns>

hedera/tutorials/more-tutorials/json-rpc-connections/validation-cloud.mdx

@@ -17,8 +17,23 @@ To connect to Hedera networks via Validation Cloud, simply use this URL when ini
 provider instance:
 
 <CodeGroup>
+  ```text Mainnet
+  https://mainnet.hedera.validationcloud.io/v1/<YOUR_API_KEY>
+  ```
+
+  ```text Testnet
+  https://testnet.hedera.validationcloud.io/v1/<YOUR_API_KEY>
+  ```
 </CodeGroup>
 
+The corresponding chain IDs are:
+
+| Network        | Chain ID (decimal) | Chain ID (hex) |
+| -------------- | :----------------: | :------------: |
+| **Mainnet**    | `295`              | `0x127`        |
+| **Testnet**    | `296`              | `0x128`        |
+
+
 <Info>
   **Note:** Validation Cloud provides RPC endpoints for Hedera Mainnet and Hedera Testnet but not for Hedera Previewnet.
 </Info>
@@ -48,6 +63,20 @@ with a Validation Cloud API Endpoint Key, and that requires the following prereq
 
 Now you're ready to connect to an RPC endpoint or query a Mirror Node via Validation Cloud!
 
-You can also watch this short video showing the process end-to-end, with examples of making Hedera JSON-RPC and Mirror Node requests with Validation Cloud:
+## Additional resources
+
+* [Validation Cloud documentation](https://docs.validationcloud.io/v1)
+* [Hedera JSON-RPC Relay API reference](https://docs.validationcloud.io/v1/hedera/json-rpc-relay-api)
+* [Hedera REST Mirror Node API reference](https://docs.validationcloud.io/v1/hedera/rest-mirror-node-api)
+* [Validation Cloud Node API dashboard](https://app.validationcloud.io/)
+
+---
 
-<iframe width="768" height="432" src="https://www.loom.com/share/22cb87ee589248e58c95bbba6edc1667?sid=a93b0c6d-58a9-40de-a230-509b4d2198a3" title="Hedera Ecosystem - get up and running with Validation Cloud" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
+<Columns cols={2}>
+  <Card title="Editor: Krystal, Senior DX Engineer">
+    [GitHub](https://github.com/theekrystallee) | [X](https://X.com/theekrystallee) | [LinkedIn](https://linkedin.com/in/theekrystallee)
+  </Card>
+  <Card title="Editor: Logan, Senior Software EngineerI" arrow>
+    [GitHub](https://github.com/quiet-node) | [LinkedIn](https://www.linkedin.com/in/logann131/)
+  </Card>
+</Columns>

hedera/tutorials/smart-contracts/how-to-verify-a-smart-contract-on-hashscan.mdx

@@ -169,7 +169,7 @@ While the bundled metadata approach above is more robust than uploading individu
     [GitHub](https://github.com/ed-marquez) |
     [LinkedIn](https://www.linkedin.com/in/ed-marquez/)
   </Card>
-  <Card title="Editor: Logan, Software Engineer II">
+  <Card title="Editor: Logan, Senior Software Engineer">
     [GitHub](https://github.com/quiet-node) |
     [LinkedIn](https://www.linkedin.com/in/logann131/)
   </Card>

hedera/tutorials/smart-contracts/hts-x-evm-part-1-how-to-mint-nfts.mdx

@@ -777,7 +777,7 @@ Check out our GitHub repo to find the full contract and Hardhat test scripts, al
 - [Full Contract and Tests Repository](https://github.com/hedera-dev/hedera-code-snippets/tree/main/hts-evm-mint-nfts)
 
 <Columns cols={2}>
-  <Card title="Writer: Jake, DevRel Engineer" arrow>
+  <Card title="Writer: Jake, Senior DevRel Engineer" arrow>
     [GitHub](https://github.com/jaycoolh) | [X](https://x.com/jaycoolh)
   </Card>
   <Card title="Editor: Michiel, DevRel Engineer" arrow>

hedera/tutorials/smart-contracts/hts-x-evm-part-2-kyc-and-update.mdx

@@ -891,7 +891,7 @@ Check out our GitHub repo to find the full contract and Hardhat test scripts, al
 - [Full Contract and Tests Repository](https://github.com/hedera-dev/hedera-code-snippets/tree/main/hts-evm-mint-nfts)
 
 <Columns cols={2}>
-  <Card title="Writer: Jake, DevRel Engineer" arrow>
+  <Card title="Writer: Jake, Senior DevRel Engineer" arrow>
     [GitHub](https://github.com/jaycoolh) | [X](https://x.com/jaycoolh)
   </Card>
   <Card title="Editor: Michiel, DevRel Engineer" arrow>

hedera/tutorials/smart-contracts/hts-x-evm-part-3-how-to-pause-freeze-wipe-and-delete-nfts.mdx

@@ -983,7 +983,7 @@ Check out our GitHub repo to find the full contract and Hardhat test scripts, al
 - [Full Contract and Tests Repository](https://github.com/hedera-dev/hedera-code-snippets/tree/main/hts-evm-mint-nfts)
 
 <Columns cols={2}>
-  <Card title="Writer: Jake, DevRel Engineer" arrow>
+  <Card title="Writer: Jake, Senior DevRel Engineer" arrow>
     [GitHub](https://github.com/jaycoolh) | [X](https://x.com/jaycoolh)
   </Card>
   <Card title="Editor: Michiel, DevRel Engineer" arrow>