> 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/api/readme.md).

# API Reference

Lighter and Lighter on Robinhood Chain expose the **same REST API, WebSocket API and transaction format**. Pick the base URL and chain ID that match the exchange you are integrating; the server selector in each endpoint's **Test it** panel lists all four.

| Exchange                           | REST base URL                         | WebSocket                                  | Chain ID |
| ---------------------------------- | ------------------------------------- | ------------------------------------------ | -------- |
| Lighter mainnet                    | `https://mainnet.zklighter.elliot.ai` | `wss://mainnet.zklighter.elliot.ai/stream` | `304`    |
| Lighter testnet                    | `https://testnet.zklighter.elliot.ai` | `wss://testnet.zklighter.elliot.ai/stream` | `300`    |
| Lighter on Robinhood Chain mainnet | `https://api.rh.lighter.xyz`          | `wss://api.rh.lighter.xyz/stream`          | `466324` |
| Lighter on Robinhood Chain testnet | `https://api.rh-testnet.lighter.xyz`  | –                                          | `300`    |

Endpoints marked **Lighter on Robinhood Chain only** (points, referral points) exist only on the RH servers. Endpoints marked **Lighter only** (binary options) exist only on the Lighter servers.

{% hint style="info" %}
Lighter RH is a **separate exchange**: accounts, balances, API keys, nonces and account indexes don't carry over, and a transaction signed for one is rejected by the other. See [Lighter on Robinhood Chain](https://docs.lighter.xyz/developers/robinhood-chain/overview).
{% endhint %}

## Sections

* **REST API** – every endpoint under `/api/v1/`, grouped by resource.
* [**WebSocket**](/api/websocket.md) – streaming market and account data, and sending transactions over WebSocket.
* [**Explorer API**](https://docs.lighter.xyz/api/explorer-api) – blocks, batches, account logs and market logs.

New to the API? Start with [Get Started](https://docs.lighter.xyz/developers) and [Signing Transactions](https://docs.lighter.xyz/developers/integration-guides/signing-transactions).


---

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