# Add Mode
## Mainnet
To add Mode Mainnet as a custom network to MetaMask:
1. Open the MetaMask browser extension.
2. Open the network selection dropdown menu by clicking the dropdown button at the top of the extension.
3. Click the **Add network** button.
4. Click **Add a network manually**.
5. In the **Add a network manually** dialog that appears, enter the following information:
You should now be able to connect to the Mode Mainnet by selecting it from the network selection dropdown menu.
## Testnet
#### MetaMask[](https://docs.base.org/using-base#metamask)
To add Mode Sepolia Testnet as a custom network to MetaMask:
1. Open the MetaMask browser extension.
2. Open the network selection dropdown menu by clicking the dropdown button at the top of the extension.
3. Click the **Add network** button.
4. Click **Add a network manually**.
5. In the **Add a network manually** dialog that appears, enter the following information:
| Name | Value |
| --------------- | --------------------------------------- |
| Network Name | Mode Sepolia |
| RPC Endpoint | |
| Chain ID | 919 |
| Currency Symbol | ETH |
| Block Explorer | |
6. Tap the Save button to save Mode Sepolia as a network.
You should now be able to connect to the Mode Sepolia testnet by selecting it from the network selection dropdown menu.
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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.mode.network/user-guides/using-mode-mainnet.md?ask=
```
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.