You can use the following RPC URLs for Sui testnet: https://rpc-ws-testnet-w2.suiscan.xyz, https://fullnode.testnet.sui.io, https://sui-api.rpcpool.com, https://sui-testnet-fullnode.quantnode.tech, https://sui-testnet.public.blastapi.io, https://rpc.ankr.com/sui_testnet, http://testnet.suiet.app, https://sui-testnet-endpoint.blockvision.org.

You can use the following RPC URLs for Sui testnet: https://rpc-ws-testnet-w2.suiscan.xyz, https://fullnode.testnet.sui.io, https://sui-api.rpcpool.com, https://sui-testnet-fullnode.quantnode.tech, https://sui-testnet.public.blastapi.io, https://rpc.ankr.com/sui_testnet, http://testnet.suiet.app, https://sui-testnet-endpoint.blockvision.org.

You can switch to other public RPC endpoints when the Martian (Mars Protocol) testnet RPC is down. You might use the official backup RPC endpoint at https://testnet-rpc.marsprotocol.io:443, maintained by Mars contributors and listed in the publicly maintained Cosmos chain registry  . That gives you a reliable fallback connection.

You could also consider hosting your own Mars node via Marsd or using community‑maintained RPC services if the public one fails  . Running a local node gives you full control and avoids relying on external services.

If you want more options, check the Cosmos chain registry or Mars Protocol docs for alternative public endpoints or validators offering RPC access.

To sum up: if one RPC endpoint goes offline, just update your configuration to use https://testnet‑rpc.marsprotocol.io:443 or run your own node with Marsd for continued access.

When Martian testnet RPCs are down, consider these alternative testnet RPCs ¹ ²:

• MegaETH Testnet RPC: (link unavailable)
• Recall Testnet RPCs:
  • Recall EVM RPC: (link unavailable)
  • Object API: (link unavailable)
  • CometBFT RPC: (link unavailable)
  • Parent EVM RPC: (link unavailable)

You can also explore other testnet RPCs on platforms like ³ ⁴:

• ChainList: Provides a list of EVM networks, including MegaETH Testnet, with their respective RPC URLs and chain settings.
• RPC.info: Offers a comprehensive list of blockchain RPCs for various chains, including testnets.

Keep in mind that the availability and performance of these RPCs may vary. Always check the official documentation and support channels for the specific testnet you're working with for the most up-to-date information on RPCs and any potential issues.

When the Martian testnet RPC is down, you can switch to other public RPC endpoints. Options include:

1. The official backup RPC endpoint: (link unavailable)
2. Hosting your own Mars node using Marsd
3. Community-maintained RPC services
4. Alternative public endpoints or validators listed in the Cosmos chain registry or Mars Protocol docs

If one endpoint fails, update your config to use the backup or run your own node for uninterrupted access.