> For the complete documentation index, see [llms.txt](https://metasky.gitbook.io/mews/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://metasky.gitbook.io/mews/metasky-api-collection/blockchains-and-networks.md).

# Blockchains and Networks

Depending on which environment your application is connecting, your blockchain transactions will be directed to a specific blockchain network. Please find below an overview of the different associated blockchain networks we currently support.

<table data-header-hidden><thead><tr><th width="234"></th><th></th><th></th></tr></thead><tbody><tr><td><mark style="color:red;"><strong>BLOCKCHAIN</strong></mark></td><td><mark style="color:red;"><strong>CHAIN_ID</strong></mark></td><td><mark style="color:red;"><strong>NETWORK NAME</strong></mark></td></tr><tr><td>ETHEREUM</td><td>1</td><td>ETHEREUM</td></tr><tr><td>ETHEREUM</td><td>11155111</td><td>SEPOLIA</td></tr><tr><td>ETHEREUM</td><td>137</td><td>POLYGON</td></tr><tr><td>ETHEREUM</td><td>80001</td><td>POLYGON MUMBAI</td></tr><tr><td>NEAR</td><td>mainnet</td><td>NEAR</td></tr><tr><td>NEAR</td><td>testnet</td><td>NEAR TESTNET</td></tr></tbody></table>

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