> For the complete documentation index, see [llms.txt](https://docs.projectserum.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.projectserum.com/serum-ecosystem/build-on-serum/add-a-market-on-serum-serum-academy.md).

# Listing and Adding Markets

## Listing and Adding Custom Markets

Anyone can now list SPL tokens or Wrapped ERC20 Tokens on Serum.

### List New Market

{% hint style="danger" %}
This will create a new market and will require SOL to do it, if you want to add a market to a GUI that hasn't listed it you need to **Add Custom Market**
{% endhint %}

This will create a new market for a pair of tokens. Anyone can list any SPL or (wrapper on) ERC20 token on [Serum](https://dex.cyclos.io/#/list-new-market). 

![](/files/-Mkboom4D5rZsuINpu4c)

* **Base Token Mint Address:** The base token is the token being traded. For example, the base token of a BTC/USDT market is BTC.
* **Quote Token Mint Address:** The quote token is the token used to price trades. For example, the quote token of a BTC/USDT market is USDT.
* **Minimum Order Size:** Smallest allowed order size. For a BTC/USDT market, this would be in units of BTC, a.k.a. the Lot size.
* **Tick Size:** Smallest amount by which prices can move. For a BTC/USDT market, this would be in units of USDT, a.k.a. the price increment.

{% hint style="warning" %}
Creating a market should cost around 4 SOL. At the moment there is no way to close the market and recover the funds, make absolutely sure you want to create a market.
{% endhint %}

1. Obtain your SPL tokens; you can convert them between ERC20 and SPL via [Wormhole](https://wormholebridge.com/#/) or [Sollet Bridge](https://docs.projectserum.com/guides/getting-started/wallet-support/sol-wallet-serum-academy/converting-erc20-to-spl-tokens).
2. Go to a [GUI that allows you to list market](https://dex.cyclos.io/#/list-new-market)s.
3. Enter the desired parameters and submit. Check your wallet for messages
4. Copy the New market address

The Nodes are handling the details (including [cranking](https://docs.google.com/document/d/1isGJES4jzQutI0GtQGuqtrBUqeHxl_xJNXdtOv4SdII/edit)). You will only have to bring your own liquidity.

{% hint style="danger" %}
The Token Address or **Mint Address** is the **contract address** of a token i.e. the **token identifier**. Do not send tokens to this address. You can look for the mint addresses on your wallet or an explorer.
{% endhint %}

{% hint style="info" %}
Your market won't automatically appear on GUIs that are not listed, you must add it as a **Custom Market** first. 
{% endhint %}

### Add Custom Market

Direct links to the market won't work if it hasn't been listed officially by the GUI, if you want to use it you must

* Click the **+ button** on the homepage of the DEX, normally next to the trading pair
* Enter the New Market Address (Market ID) 
* Choose the market Label and Base Label of the token
* Click Add

![](/files/-Mkc3lFN2eD_bms5MKX3)

{% hint style="info" %}
**Warning: unknown token** is the expected message when you enter the market ID, \
Do not use if it mentions being a deprecated market.
{% endhint %}