> For the complete documentation index, see [llms.txt](https://docs.creditcoin.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.creditcoin.org/creditcoin-usc/usc-chains-environments.md).

# USC Chains - Environments

### CC3 Mainnet <a href="#cc3-testnet" id="cc3-testnet"></a>

<table data-header-hidden><thead><tr><th width="215"></th><th></th></tr></thead><tbody><tr><td>USC Dashboard</td><td><a href="https://dashboard.cc3-mainnet-usc.creditcoin.network/">https://dashboard.cc3-mainnet-usc.creditcoin.network/</a></td></tr><tr><td>Proof Builder API</td><td><a href="https://proofbuilder.cc3-mainnet-usc.creditcoin.network/">https://proofbuilder.cc3-mainnet-usc.creditcoin.network/</a><br><br>To view a swagger, please use testnet version.</td></tr><tr><td>Decoder contract</td><td>0x9D094C9f22B10FCf842c2fC6A0981630A4F94B5C</td></tr><tr><td>ChainInfo Precompile</td><td>0x0000000000000000000000000000000000000fd3</td></tr><tr><td>BlockProver Precompile</td><td>0x0000000000000000000000000000000000000FD2</td></tr><tr><td>SDK</td><td><a href="https://www.npmjs.com/package/@gluwa/usc-sdk">https://www.npmjs.com/package/@gluwa/usc-sdk</a></td></tr></tbody></table>

| **Supported Mainnet Chains** | **Chainkey** | **Genesis Block** |
| ---------------------------- | ------------ | ----------------- |
| Ethereum Mainnet             | 1            | 0                 |

### CC3 Testnet <a href="#cc3-testnet" id="cc3-testnet"></a>

<table data-header-hidden><thead><tr><th width="215"></th><th></th></tr></thead><tbody><tr><td>USC Dashboard</td><td><a href="https://dashboard.cc3-testnet.creditcoin.network/">https://dashboard.cc3-testnet.creditcoin.network/</a></td></tr><tr><td>Proof builder API</td><td><a href="https://proof-gen-api.cc3-testnet.creditcoin.network/">https://proof-gen-api.cc3-testnet.creditcoin.network/</a></td></tr><tr><td>Decoder contract</td><td>0x731c345d79Fb8BbDC541f9DF3b6317585F849F9f</td></tr><tr><td>ChainInfo Precompile</td><td>0x0000000000000000000000000000000000000fd3</td></tr><tr><td>BlcokProver Precompile</td><td>0x0000000000000000000000000000000000000FD2</td></tr><tr><td>SDK</td><td><a href="https://www.npmjs.com/package/@gluwa/usc-sdk">https://www.npmjs.com/package/@gluwa/usc-sdk</a></td></tr></tbody></table>

| **Supported Testnet Chains** | **Chainkey** | **Genesis Block** |
| ---------------------------- | ------------ | ----------------- |
| Ethereum Sepolia             | 1            | 0                 |
| Ethereum Mainnet             | 3            | 0                 |