> For the complete documentation index, see [llms.txt](https://snowball-mns.gitbook.io/snowball/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://snowball-mns.gitbook.io/snowball/modular-naming-service-mns/what-is-mns.md).

# What is MNS?

[**Modular Naming Service**](https://snowball-mns.gitbook.io/snowball/modular-naming-service-mns/www.modular.name) is a chain-agnostic decentralized identity system built for the modular future of Web3.

<figure><img src="/files/b0K4KJxbWcQDMyQqfWd4" alt=""><figcaption></figcaption></figure>

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The Modular Naming Service allows users to mint, manage, and trade digital identities across rollups and L1s with support for sub-identities, AI-driven reputation scoring, and marketplace integrations. Built as the identity layer for the rapidly growing rollup ecosystem, MNS simplifies Web3 UX by offering human-readable names, unified cross-chain profiles, and privacy-preserving data control.

**Key Features:**

* **Cross-Chain Identity Minting:**\
  Claim unique, human-readable identities that resolve across Ethereum, Movement, Aptos, and other supported chains.
* **Sub-Identities:**\
  Create hierarchical naming structures (e.g., `@alex/dev`, `@alex/nft`), ideal for personal and organizational use.
* **Identity Marketplace:**\
  List and trade identities in a native marketplace with NFT-based ownership and royalty mechanics.
* **ENS Integration:**\
  Users can reclaim ENS identities in MNS, retaining on-chain ownership verification.
* **Reputation Scoring System:**\
  Gain a Reputation Score based on wallet activity, social behavior, DeFi usage, DAO voting, and KOL influence. Scores enable smart airdrops, platform trust ranking, and user segmentation.
* **Modular Identity Records:**\
  Attach wallet addresses, metadata, social links, and custom TXT records to identities.
* **Primary Identity & Reverse Resolution:**\
  Set a primary identity for explorer visibility and dApp resolution. Includes support for reverse lookup.
* **Gamification & Referral:**\
  Integrated quests, leaderboards, and referral rewards system (Flakes + cashback). KOLs can earn up to 50% commissions.