> ## Documentation Index
> Fetch the complete documentation index at: https://docs.biconomy.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Supported chains

> The list of chains that have Biconomy stack deployed with supported versions

## 🚀 MEE Contracts and versions

The Modular Execution Environment (MEE) is Biconomy's Smart Account and Execution infrastructure (which is compliant with and built on ERC 4337) that enables gasless transactions and modular execution flows. Below is a comprehensive list of supported chains and their corresponding MEE versions. On the Biconomy Dashboard, set up a project on the Supertransaction tab, get an API key and you will have full access to all chains with just one API key.

For detailed information about contract addresses and audit reports for each version, please check our [contracts and audits page](https://docs.biconomy.io/contracts-and-audits).

<Tabs>
  <Tab title="Mainnets">
    | Network            | MEE Versions                             |
    | ------------------ | ---------------------------------------- |
    | Ethereum Mainnet   | 2.2.2, 2.2.1, 2.1.0, 2.0.0, 1.1.0, 1.0.0 |
    | Base Mainnet       | 2.2.2, 2.2.1, 2.1.0, 2.0.0, 1.1.0, 1.0.0 |
    | Polygon Mainnet    | 2.2.2, 2.2.1, 2.1.0, 2.0.0, 1.1.0, 1.0.0 |
    | Arbitrum Mainnet   | 2.2.2, 2.2.1, 2.1.0, 2.0.0, 1.1.0, 1.0.0 |
    | OP Mainnet         | 2.2.2, 2.2.1, 2.1.0, 2.0.0, 1.1.0, 1.0.0 |
    | BSC Mainnet        | 2.2.2, 2.2.1, 2.1.0, 2.0.0, 1.1.0, 1.0.0 |
    | Sonic Mainnet      | 2.2.2, 2.2.1, 2.1.0, 2.0.0, 1.1.0, 1.0.0 |
    | Scroll Mainnet     | 2.2.1, 2.1.0, 2.0.0, 1.1.0, 1.0.0        |
    | Gnosis Mainnet     | 2.2.2, 2.2.1, 2.1.0, 2.0.0, 1.1.0, 1.0.0 |
    | Avalanche Mainnet  | 2.2.2, 2.2.1, 2.1.0, 2.0.0, 1.1.0        |
    | Apechain           | 2.2.2, 2.2.1, 2.1.0, 2.0.0, 1.1.0        |
    | Hyper EVM          | 2.2.2, 2.2.1, 2.1.0, 2.0.0, 1.1.0        |
    | Sei Mainnet        | 2.2.1, 2.1.0, 2.0.0, 1.1.0               |
    | Unichain Mainnet   | 2.2.2, 2.2.1, 2.1.0, 1.1.0               |
    | Katana Mainnet     | 2.2.2, 2.2.1, 2.1.0, 1.1.0               |
    | Lisk Mainnet       | 2.2.1, 2.1.0, 1.1.0                      |
    | Worldchain Mainnet | 2.2.2, 2.2.1, 2.1.0, 1.1.0               |
    | Monad Mainnet      | 2.2.2, 2.2.1, 2.1.0                      |
    | Plasma Mainnet     | 2.2.2, 2.2.1, 2.1.0                      |
    | Chiliz Mainnet     | 2.2.2, 2.2.1, 2.1.0, 2.0.0, 1.1.0, 1.0.0 |
  </Tab>

  <Tab title="Testnets">
    | Network                 | MEE Versions                             |
    | ----------------------- | ---------------------------------------- |
    | Ethereum Sepolia        | 2.2.2, 2.2.1, 2.1.0, 2.0.0, 1.1.0, 1.0.0 |
    | Base Sepolia            | 2.2.2, 2.2.1, 2.1.0, 2.0.0, 1.1.0, 1.0.0 |
    | Polygon Amoy Testnet    | 2.2.2, 2.2.1, 2.1.0, 2.0.0, 1.1.0, 1.0.0 |
    | Arbitrum Sepolia        | 2.2.2, 2.2.1, 2.1.0, 2.0.0, 1.1.0, 1.0.0 |
    | OP Sepolia Testnet      | 2.2.2, 2.2.1, 2.1.0, 2.0.0, 1.1.0, 1.0.0 |
    | BSC Testnet             | 2.2.2, 2.2.1, 2.1.0, 2.0.0, 1.1.0, 1.0.0 |
    | Scroll Sepolia Testnet  | 2.2.1, 2.1.0, 2.0.0, 1.1.0, 1.0.0        |
    | Gnosis Chiado Testnet   | 2.2.2, 2.2.1, 2.1.0, 2.0.0, 1.1.0, 1.0.0 |
    | Avalanche Fuji Testnet  | 2.2.2, 2.2.1, 2.1.0, 2.0.0, 1.1.0        |
    | Apechain Curtis Testnet | 2.2.1, 2.1.0, 2.0.0, 1.1.0               |
    | Core DAO Testnet        | 2.2.1, 2.1.0, 2.0.0, 1.1.0               |
    | Sei Testnet             | 2.2.1, 2.1.0, 2.0.0, 1.1.0               |
    | Neura Testnet           | 2.2.1, 2.1.0, 1.1.0                      |
    | Unichain Testnet        | 2.2.2, 2.2.1, 2.1.0, 1.1.0               |
    | Worldchain Testnet      | 2.2.2, 2.2.1, 2.1.0, 1.1.0               |
    | Sonic Testnet           | 2.2.2, 2.2.1, 2.1.0                      |
    | Monad Testnet           | 2.2.2, 2.2.1, 2.1.0                      |
    | Plasma Testnet          | 2.2.2, 2.2.1, 2.1.0                      |
    | Arc Testnet             | 2.2.1, 2.1.0                             |
    | Sophon Zk Testnet       | 2.2.1, 2.1.0                             |
    | Fluent Testnet          | 2.1.0, 1.1.0                             |
    | Chiliz Spicy Testnet    | 2.2.2, 2.2.1, 1.1.0                      |
  </Tab>
</Tabs>

***

## 🔧 ERC-4337 Infra Support

<Accordion title="EntryPoint v0.7.0 – Nexus Smart Account (v1.0.2)">
  <Warning>
    We are not supporting new chains with this infrastructure. Any new chains we support will utilise our newer and advanced MEE stack, and thus the newer chain support are added to the above MEE Contracts and Services list.

    If you are a new developer, or starting a new project to find the chains we support, do not reference this list.
  </Warning>

  <Info>
    Why did we move to MEE in favour of ERC 4337? You can learn more [here](https://docs.biconomy.io/new/learn-about-biconomy/mee-vs-4337).
  </Info>

  <Tabs>
    <Tab title="Full Support">
      All features supported: Bundler, Sponsorship PM, Token PM, Contracts, and Nexus v1.0.2

      | Network                     | Bundler | Sponsorship PM | Token PM | Contracts | Nexus |
      | --------------------------- | :-----: | :------------: | :------: | :-------: | :---: |
      | Ethereum Mainnet            |    ✅    |        ✅       |     ✅    |     ✅     |   ✅   |
      | Ethereum Sepolia            |    ✅    |        ✅       |     ✅    |     ✅     |   ✅   |
      | Base Mainnet                |    ✅    |        ✅       |     ✅    |     ✅     |   ✅   |
      | Base Sepolia                |    ✅    |        ✅       |     ✅    |     ✅     |   ✅   |
      | OP Mainnet                  |    ✅    |        ✅       |     ✅    |     ✅     |   ✅   |
      | OP Sepolia Testnet          |    ✅    |        ✅       |     ✅    |     ✅     |   ✅   |
      | Scroll Mainnet              |    ✅    |        ✅       |     ✅    |     ✅     |   ✅   |
      | Scroll Sepolia Testnet      |    ✅    |        ✅       |     ✅    |     ✅     |   ✅   |
      | Arbitrum Mainnet            |    ✅    |        ✅       |     ✅    |     ✅     |   ✅   |
      | Arbitrum Sepolia Testnet    |    ✅    |        ✅       |     ✅    |     ✅     |   ✅   |
      | Binance Smart Chain Mainnet |    ✅    |        ✅       |     ✅    |     ✅     |   ✅   |
      | Binance Smart Chain Testnet |    ✅    |        ✅       |     ✅    |     ✅     |   ✅   |
      | Polygon Mainnet             |    ✅    |        ✅       |     ✅    |     ✅     |   ✅   |
      | Gnosis Mainnet              |    ✅    |        ✅       |     ✅    |     ✅     |   ✅   |
      | Sonic Mainnet               |    ✅    |        ✅       |     ✅    |     ✅     |   ✅   |
      | Blast Mainnet               |    ✅    |        ✅       |     ✅    |     ✅     |   ✅   |
    </Tab>

    <Tab title="Partial Support">
      Bundler + Sponsorship PM supported (Token PM not available)

      | Network               | Bundler | Sponsorship PM | Token PM | Contracts | Nexus |
      | --------------------- | :-----: | :------------: | :------: | :-------: | :---: |
      | Polygon Amoy Testnet  |    ✅    |        ✅       |     ❌    |     ✅     |   ✅   |
      | Gnosis Chiado Testnet |    ✅    |        ✅       |     ❌    |     ✅     |   ✅   |
      | Sonic Blaze Testnet   |    ✅    |        ✅       |     ❌    |     ✅     |   ✅   |
      | Blast Sepolia         |    ✅    |        ✅       |     ❌    |     ✅     |   ✅   |
      | Monad Testnet         |    ✅    |        ✅       |     ❌    |     ✅     |   ✅   |
      | Soneium Mainnet       |    ✅    |        ✅       |     ❌    |     ✅     |   ✅   |
      | Soneium Testnet       |    ✅    |        ✅       |     ❌    |     ✅     |   ✅   |
    </Tab>

    <Tab title="Coming Soon">
      | Network      | Bundler | Sponsorship PM | Token PM | Contracts | Nexus |
      | ------------ | :-----: | :------------: | :------: | :-------: | :---: |
      | IOTA Mainnet |    ⏳    |        ⏳       |     ⏳    |     ✅     |   ✅   |
    </Tab>
  </Tabs>

  ### Sponsorship Paymaster Contracts

  | Chains       | Contract Address                                                                                                             |
  | ------------ | ---------------------------------------------------------------------------------------------------------------------------- |
  | Base & OP    | [`0x0000006087310897e0BFfcb3f0Ed3704f7146852`](https://contractscan.xyz/contract/0x0000006087310897e0BFfcb3f0Ed3704f7146852) |
  | Other chains | [`0x00000072a5F551D6E80b2f6ad4fB256A27841Bbc`](https://contractscan.xyz/contract/0x00000072a5F551D6E80b2f6ad4fB256A27841Bbc) |
</Accordion>

***

<Accordion title="EntryPoint v0.6.0 – V2 Smart Accounts (Legacy)">
  | Network            | Testnet | Mainnet |
  | ------------------ | :-----: | :-----: |
  | Ethereum           |    ✅    |    ✅    |
  | Polygon            |    ✅    |    ✅    |
  | BSC                |    ✅    |    ✅    |
  | Polygon zkEVM      |    ✅    |    ✅    |
  | Arbitrum One       |    ✅    |    ✅    |
  | Arbitrum Nova      |    ✅    |    ✅    |
  | Optimism (Sepolia) |    ✅    |    ✅    |
  | Avalanche          |    ✅    |    ✅    |
  | Base               |    ✅    |    ✅    |
  | Linea              |    ✅    |    ✅    |
  | Chiliz             |    ✅    |    ✅    |
  | Astar              |    ✅    |    ✅    |
  | opBNB              |    ✅    |    ✅    |
  | Manta              |    ✅    |    ✅    |
  | Core               |    ✅    |    ✅    |
  | Combo              |    ✅    |    ✅    |
  | Mantle (Sepolia)   |    ✅    |    ✅    |
  | Blast              |    ✅    |    ✅    |
  | Zeroone            |    ✅    |    ✅    |
  | Scroll             |    ✅    |    ✅    |
  | Zetachain          |    ✅    |    ✅    |
  | Gnosis             |    ✅    |    ✅    |
  | X Layer            |    ✅    |    ✅    |
  | Tangle             |    ✅    |    ✅    |
  | Taiko              |         |    ✅    |
  | Morph              |    ✅    |    ✅    |
  | Sei (Devnet)       |    ✅    |    ✅    |
  | Boba               |    ✅    |    ✅    |
  | 5irechain          |    ✅    |    ✅    |
  | Metal L2           |    ✅    |    ✅    |
  | Lisk               |    ✅    |    ✅    |
</Accordion>