> For the complete documentation index, see [llms.txt](https://docs.lighter.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.lighter.xyz/trading/api.md).

# API

You can find the Lighter API Documentation here: <https://apidocs.lighter.xyz/docs/get-started>

You can join the Telegram API Channel for updates here: <https://t.me/lighter_api_updates>

### API Keys

Each account and sub-account on Lighter may interact with the exchange using Lighter API keys. These API keys are owned by the account and are used to sign requests when interacting with the exchange. Signed requests are verified by the exchange to confirm authorization by the API key holder and the associated account. Each account or sub-account may register API keys at indices 0–254. Indices 0–3 are reserved for Lighter's web and mobile apps, leaving 251 for your own use.

### Sub-Accounts&#x20;

To create a Lighter account, users must have an Ethereum wallet. Using this wallet, users register a main account by signing a message that associates their Ethereum address with Lighter. Assets can then be deposited by sending a transaction from the wallet to Lighter’s smart contracts.

In addition to the main account, users may create multiple sub-accounts linked to the same Ethereum wallet.

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