ERC-404: Bridging the Gap Between Fungible and Non-Fungible Tokens


In order to combine the features of fungible (ERC-20) and non-fungible (ERC-721) tokens into a hybrid form, the ERC-404 token standard is an experimental Ethereum token standard that enables both unique and divisible asset representations on the blockchain. This article delves deeply into ERC-404 tokens, including their functionality, potential, and the best ERC-404 projects to be aware of.

The development of cryptocurrencies and blockchain technology has been greatly aided by Ethereum, the second-largest blockchain by market capitalization. Its adaptability, made possible by programmable code and smart contracts, is a crucial component of its success as it permits the development of a wide range of applications and decentralized financial (DeFi) products.

Stay in the know on crypto by frequently visiting Crypto News Today

These tokens, each with distinct functions and goals, are created according to token standards. The ERC-404 token standard is one of the newest innovations that is generating excitement because it promises a special combination of fungibility and non-fungibility.

What Does the ERC-404 Token Standard Mean for Ethereum?

ERC-404 is an experimental token standard that combines the characteristics of ERC-20 tokens (fungible, divisible like money) and ERC-721 tokens (non-fungible, unique like NFTs). It was developed by the anonymous creators “ctrl” and “Acme.” It presents the idea of “semi-fungible” tokens, which let people hold a portion of a single NFT. This opens up exciting opportunities for new DeFi applications, enhanced liquidity for NFTs, and fractional ownership of valuable digital assets.


The objective of this hybrid functionality is to furnish digital assets on the Ethereum blockchain with adaptability, inherent liquidity, and programmable scarcity. Fractional ownership of NFTs is made easier by the unofficial and experimental ERC-404 standard, which creates new opportunities for trading and experimentation in the NFT space. It offers the possibility for novel applications and utility in digital asset management and trading by enabling a special fusion of fungibility and non-fungibility within a single token standard.

CryptoCaster Quick Check:

The Functioning of ERC-404 Tokens

Smart contracts are used by ERC-404 tokens to control how underlying NFTs are divided and owned. A distinct fraction of the NFT is represented by each ERC-404 token, and the total supply of tokens equals the number of fractions that are available. Tokens can be purchased individually or in bulk, with the option to “burn” them for the full NFT. Here is a closer look at the operation of ERC-404 tokens:

  • ERC-404 tokens are an ERC-20 and ERC-721 hybrid that can be used as fungible or non-fungible tokens. They accomplish this by tying each issued token—which is fungible—to a non-fungible token (NFT), which enables a combination of the traits of the two kinds of tokens.
  • Fractional Ownership of NFTs: The ability of ERC-404 tokens to allow for fractional ownership of NFTs is one of their main characteristics. This is achieved by enabling the NFT to be split into smaller, tradeable portions by linking it to a fungible token. In the NFT market, this mechanism improves accessibility and liquidity.
  • Minting and Burning on Demand: The trading of a fractional token that represents a portion of an NFT triggers the dynamic minting or burning of the corresponding NFT. When a fraction of the token is transacted, the associated NFT gets burned, whereas the addition of fractions to form a complete token leads to the automatic creation of a new NFT. This mechanism facilitates effortless changes and transfers of NFT ownership and features, in line with transactions of the base fungible tokens.

Possible Applications of ERC-404 Tokens

Fractional ownership is one way that ERC-404 tokens can greatly increase NFT liquidity. This solves a common issue in the traditional NFT market by making it simpler for buyers and sellers to trade portions of an NFT without requiring a ready counterparty to buy the entire asset. The special combination of fungibility and non-fungibility creates new opportunities for NFT initiatives and uses, such as but not restricted to:

  • Art & Collectibles: Fractional ownership can make expensive artwork and rare collectibles more accessible to the general public.
  • Real estate: Fractional ownership and simpler access to investments are made possible by the tokenization of real estate assets.
  • Gaming & Metaverse: It is possible to divide and trade virtual land or in-game assets more effectively.
  • Decentralized Funding: Startups or projects can offer their fractionalized shares to the public for investment.

Top ERC-404 Projects

As a result of the ERC-404 token standard, which combines the features of ERC-20 and ERC-721 tokens, a number of noteworthy projects within the Ethereum ecosystem have emerged. With their creative applications of the ERC-404 standard, Pandora (PANDORA), DeFrogs (DEFROGS), and Monkees (MONKEES) are a few of these that are dominating the market.

Pandora (PANDORA)

PANDORA price chart | Source: CoinGecko 

The first project based on the ERC-404 standard, Pandora, demonstrates the standard’s potential by tying each token that is issued to a new NFT, allowing for the innovative fractionalization and trading of NFTs. As a result of the ability to buy and sell portions of NFTs as tokens, this system potentially resolves the liquidity problems that have historically been associated with NFTs. This increases accessibility and liquidity in the NFT market.

Less than a week after its debut, PANDORA reached a record high of over $32,000, largely due to the ERC-404 trend. The chart above shows that even though it has dropped since the time of writing, it is still much higher than the $1,500 level it began trading at.


DEFROGS price chart | Source: CoinGecko 

After Pandora’s success, another project that made use of the ERC-404 standard was called DeFrogs. It includes a collection of 10,000 Profile Picture NFTs (Frog PFPs), where minting an NFT is equivalent to purchasing a DeFrogs token. The project gains from the liquidity provision of the ERC-404 standard, which enables users to exchange tokens and NFTs with ease.

Although DEFROGS hasn’t experienced price swings as severe as PANDORA, it has nevertheless increased to a peak of more than $3,500 before declining. DEFROGS is currently worth approximately $1,255.

Monkees (MONKEES)

A more recent player in the ERC-404 market, Monkees provides a selection of PFPs featuring monkeys. Despite only recently launching, Monkees has experienced significant growth by utilizing the ERC-404 standard to enable NFT ownership and trading.

The ERC-404 standard is also utilized by other projects, such as Punks404 (PUNK) and EtherRock404 (ROCK), though their market capitalization and trading volume differ.

What’s Behind the Excitement for the ERC-404 Standard?

The blockchain and NFT (Non-Fungible Token) spaces have advanced significantly with the introduction of the ERC-404 standard, which has attracted a lot of attention from the general public as well as the cryptocurrency community. Some of the most important problems facing the NFT market are addressed by this standard, including:

  • Resolving NFT liquidity issues: The indivisible and illiquid nature of traditional NFTs prevents their widespread adoption. In order to address this, ERC-404 allows fractional ownership, which improves trade accessibility and ease of use for high-value NFTs.
  • Opening up new DeFi possibilities: By allowing the integration of fractionalized NFTs into DeFi protocols, ERC-404 opens the door for innovative financial uses of NFTs, such as yield farming and lending.
  • Early-stage potential: Investors and early adopters looking for opportunities in cutting-edge and potentially disruptive technologies are drawn to ERC-404 due to its novelty and experimental nature.

Recent ERC-404 projects, such as “Pandora,” saw notable price increases, which fueled the market’s exaggerated expectations regarding the standard’s potential.

Obstacles and Factors to Consider When Implementing the ERC-404 Token Standard

Todate, the ERC-404 standard has not been audited and has not gone through the customary Ethereum Request for Comments (ERC) and Ethereum Improvement Proposal (EIP) procedures. Concerns concerning possible weaknesses and inefficiencies as well as the dangers of incorporating unaudited and possibly defective systems into Ethereum ecosystem projects are raised by this lack of formal vetting.

In addition, combining fungible and non-fungible features into a single token standard creates special technical difficulties that must be carefully implemented and tested to guarantee functionality and security. There are other issues with ERC-404 tokens that you should be aware of.

  • Concerns about Liquidity: Although one of the goals of ERC-404 is to increase NFT liquidity by allowing fractional ownership, a number of factors, such as user adoption, platform support, and general market conditions, will affect how liquid these tokens actually are on the market. Liquidity issues may arise for early projects until the standard is more extensively used.
  • Limited Adoption: Compared to more established standards like ERC-20 and ERC-721, ERC-404 is still in its infancy, with very little project and user adoption.
  • Technical Difficulties: The technology needs to be further developed and refined due to its technical complexity and potential security risks. The combination of fungible and non-fungible features in tokens is handled differently by ERC-404, so integrating these tokens with wallets and platforms that aren’t yet set up to handle them will likely be difficult.
  • Speculative Investments: Because ERC-404 tokens are new and experimental, investing in projects involving them is very speculative. There is a greater chance of bubbles and subsequent crashes because the market’s current enthusiasm may be motivated more by speculative and novel ideas than by underlying value.
  • Regulatory Uncertainty: Given that governments around the world are still debating how to regulate cryptocurrencies and NFTs, the distinctive features of ERC-404 tokens may draw regulatory attention. Regulations that are changing may have an effect on how widely used and useful ERC-404 tokens are.

Prospects for ERC-404 Tokens Within the Ethereum Framework

An important development in the Ethereum ecosystem is the appearance of ERC-404, which indicates a move toward more creative and adaptable token standards. With improved functionality, liquidity, and utility for Ethereum-based tokens, the standard may open the door to a new era of digital asset management and trading as it develops and maybe goes through formal vetting procedures.

The ERC-404 token standard, though still in its infancy, has the potential to completely transform the way we use digital assets on Ethereum. Its capacity to close the fungibility gap makes new DeFi applications, more liquidity, and creative use cases possible.CRYPTOCASTER® - DECENTRALIZED FREEDOM!


e hope you enjoyed this article. Before you move on, we invite you to consider supporting CryptoCaster’s journalism.

Billionaire owners like Elon Musk, Larry Fink (BlackRock), and Jamie Dimon (JP Morgan Chase) often have a strong influence on the hidden agendas surrounding the paradigm shift brought about by cryptocurrency and emerging Web3 technologies. CryptoCaster stands apart. We have no billionaire owner or shareholders to please. Our journalism is dedicated to serving the public interest in crypto development and institutional disruptions, not profit motives.

We avoid the pitfall of much U.S. and global media, which often resorts to false equivalence in the name of neutrality and retail consumer protection. While fairness and transparency guide everything we do, we recognize that there is a right and wrong stance in the fight against fiat global banking interests and the monetary reconstruction driven by the emerging crypto ecology.

When we report on issues like the FTX, Binance, and Ripple crises, we’re not afraid to name names and uncover the truth. As a crypto sentinel, we offer a fresh, outsider perspective on global monetary disruption—something often missing from the insular American and European media bubble.

CryptoCaster’s paywall-free journalism is accessible worldwide thanks to our unique reader-supported model. This is made possible by readers like you. Your support keeps us independent, free from outside influence, and accessible to everyone, regardless of their ability to pay for news and information.

We are grateful for the ongoing monetary support from our readers. If you haven’t yet considered supporting CryptoCaster, please consider contributing just once from $1 or more in Bitcoin (satoshi) or Ether, or even better, support us monthly with a bit more. Scroll further down this page to find CryptoCaster’s wallet addresses.

Thank you.

Kristin Steinbeck
Editor, CryptoCaster

Please Read Essential Disclaimer Information Here.
© 2024 Crypto Caster provides information. does not provide investment advice. Do your research before taking a market position on the purchase of cryptocurrency and other asset classes. Past performance of any asset is not indicative of future results. All rights reserved.

Contribute to CryptoCaster℠ Via Metamask or favorite wallet. Send Coin/Token to Addresses Provided Below.
Thank you!
BTC – bc1qgdnd752esyl4jv6nhz3ypuzwa6wav9wuzaeg9g
ETH – 0x7D8D76E60bFF59c5295Aa1b39D651f6735D6413D
MATIC – 0x7D8D76E60bFF59c5295Aa1b39D651f6735D6413D
LITECOIN – ltc1qxsgp5fykl0007hnwgl93zr9vngwd2jxwlddvqt


You may also like