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@ -4,28 +4,35 @@ description: Choose the revenue model during asset publishing
# Asset Pricing
Ocean Protocol offers two types of pricing options for asset monetization. The publisher can choose a pricing model which best suits their needs while publishing an asset. The pricing model selected cannot be changed once the asset is published.
Ocean Protocol offers you flexible and customizable pricing options to monetize your valuable data assets. You have two main pricing models to choose from: 
* Fixed pricing 
* Free pricing
These models are designed to cater to your specific needs and ensure a smooth experience for data consumers.
The price of an asset is determined by the number of Ocean tokens a buyer must pay to access the asset. When users pay the right amount of Ocean tokens, they get a _datatoken_ in their wallets, a tokenized representation of the access right stored on the blockchain. To read more about datatoken and data NFT click [here](datanft-and-datatoken/).
### Fixed pricing
With the fixed price model, publishers set the price for the data in OCEAN. Ocean Market creates a datatoken in the background with a value equal to the dataset price in OCEAN so that buyers do not have to know about the datatoken. Buyers pay the amount specified in OCEAN for access. The publisher can update the price of the dataset later anytime.
With the fixed pricing model, you have the power to set a specific price for your data assets in Ocean tokens (OCEAN). This means that buyers interested in accessing your data will need to pay the designated amount of OCEAN. To make things even easier, Ocean Market automatically creates a special token called a "datatoken" behind the scenes. 
A [FixedRateExchange](https://github.com/oceanprotocol/contracts/blob/v4main/contracts/pools/fixedRate/FixedRateExchange.sol) smart contract stores the information about the price of the assets published using this model.
This datatoken represents the access right to your data, so buyers don't have to worry about the technical details. If you ever want to adjust the price of your dataset, you have the flexibility to do so whenever you need. 
The image below shows how to set the fixed pricing of an asset in the Ocean's Marketplace. Here, the price of the asset is set to 10 Ocean tokens.
![Fixed asset pricing](../.gitbook/assets/market/fixed-asset-pricing.png)
The fixed pricing model relies on the [createNftWithErc20WithFixedRate](https://github.com/oceanprotocol/contracts/blob/main/contracts/ERC721Factory.sol#LL674C14-L674C45) smart contract, which securely stores the pricing information for assets published using this model.
### Free pricing
With the free pricing model, the buyers can access an asset without requiring them to pay for it except for the transaction fees.
On the other hand, the free pricing model gives data consumers access to your asset without requiring them to make a direct payment. Users can freely access your data, with the only cost being the transaction fees associated with the blockchain network. 
With this pricing model, datatokens are allocated to the [dispenser](https://github.com/oceanprotocol/contracts/blob/v4main/contracts/pools/dispenser/Dispenser.sol) smart contract, which dispenses data tokens to users for free whenever they are accessing an asset.
In this model, datatokens are allocated to a dispenser smart contract, which dispenses data tokens to users at no charge when they access your asset. This is perfect if you want to make your data widely available and encourage collaboration. It's particularly suitable for individuals and organizations working in the public domain or for assets that need to comply with open access licenses.
Free pricing is suitable for individuals and organizations working in the public domain and want their datasets to be freely available. Publishers can also choose this model if they publish assets with licenses that require them to make them freely available.
The fixed pricing model relies on the [createNftWithErc20WithDispenser](https://github.com/oceanprotocol/contracts/blob/main/contracts/ERC721Factory.sol#LL713C14-L713C45) smart contract, which securely stores the pricing information for assets published using this model.
The image below shows how to set free access to an asset in the Ocean's Marketplace.
![Free asset pricing](../.gitbook/assets/market/free-asset-pricing.png)
To make the most of these pricing models, you can rely on user-friendly libraries such as Ocean.js and Ocean.py, specifically developed for interacting with Ocean Protocol. With Ocean.js, you can use the [createFRE() ](ocean.js/publish.md)function to effortlessly deploy a data NFT (non-fungible token) and datatoken with a fixed-rate exchange pricing model. Similarly, in Ocean.py, the [create\_url\_asset()](ocean.py/publish-flow.md) function allows you to create an asset with fixed pricing. These libraries simplify the process of interacting with Ocean Protocol, managing pricing, and handling asset creation.
By taking advantage of Ocean Protocol's pricing options and leveraging the capabilities of [Ocean.js](ocean.js/) and [Ocean.py](ocean.py/) (or by using the [Market](../user-guides/using-ocean-market.md)), you can effectively monetize your data assets while ensuring transparent and seamless access for data consumers.