An experimental token standard for creators and developers alike.

ERC-404 is an experimental, mixed ERC20 / ERC721 implementation with native liquidity and fractionalization for semi-fungible tokens.

Ecosystem

Here's what ERC-404 can do.

Compare the unique capabilities of ERC-404's semi-fungible token standard.

FEATURE / COMPATIBILITY
ERC-20
ERC-721
ERC-404
FRACTIONALIZATION
NFT PROTOCOL INTEROPERABILITY
NATIVE LIQUIDITY
ERC20 PROTOCOL INTEROPERABILITY
NON-FUNGIBLE PROPERTIES
Basic
$180
Per year (save 20%)
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Business
$280
Per year (save 20%)
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Enterprise
$480
Per year (save 20%)
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10
25
Unlimited
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10
25
Unlimited
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10
25
Unlimited
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Frequently asked questions

ERC-404 is an experimental, mixed ERC20 / ERC721 implementation featuring native liquidity and fractionalization.

What are ERC404 tokens?

ERC404 tokens are hybrid, semi-fungible tokens that enable native liquidity and fractionalization for NFTs via mixed use of ERC20 and ERC721 functions. Tentative to it's eventual EIP, it is an experimental and open-sourced token standard that has not yet been recognized by the Ethereum Foundation as an official token standard.

Why use ERC404?

The two core innovations enabled by ERC404 are native liquidity for non-fungible tokens and fractionalization without the use of external protocols or "wrappers" that abstract non-fungible tokens from their collection of origin. This vastly improves upon the user experience for NFT collectors and market participants alike, and unlocks a new asset category that is best described as semi-fungible tokens or "SFTs".

What can ERC404 be used for?

We believe that ERC404 is a major innovation that enables various interactive mechanics and new on-chain protocols for both fungible and non-fungible tokens. It's hybrid nature allows for various applications that combine the affordances of ERC20 and ERC721 tokens, giving way to a plethora of new use cases across gaming, generative art, real world assets or "RWAs", and more.

Can I create my own ERC404 tokens?

ERC404 is entirely open-source and freely accessible for both developers and creators alike. We highly encourage the exploration of ERC404s various applications as a nascent token standard, and actively maintain the public repo as well as thorough documentation on the design, development, and implementation of the token standard. Developer incentives and grants for ecosystem partners are also in the works and will be announced via the official Pandora Twitter account.

Is ERC404 an official token standard?

Not quite yet. 404 is a common error message meaning "not found" in various applications and websites. It's a naming convention that was designed to make ERC404 easier to intuit as a new kind of token, with an experimental design that we knew would confuse many protocols and dApps on launch as a result of it's experimental nature and the introduction of mixed ERC721 and ERC20 functions.

Pandora Labs on GitHub

Get started and build your next project with ERC404.

Join the ecosystem.

It's been less than a month, but ERC404s are already everywhere. Explore some of the first protocols and ecosystem partners that have integrated ERC404 and the various possibilities unlocked by semi-fungible tokens.

Working on a project that you'd like to integrate within the ecosystem? We'd love to hear from you.