1. General
What is MSU Builder?- MSU Builder is a platform and program that enables creators and developers to build services, tools, and content within the MapleStory Universe (MSU) ecosystem, using Open APIs and other resources provided by MSU.
- Anyone interested in building on MSU can apply, including individual developers, teams, and entities.
- Builder and user accounts are separate. A single wallet can be linked to either a Builder or a user account, and switching between the two is not allowed.
- API access can only be requested through a Builder account.
2. Identity, Accounts & Wallets
Do I need KYC (for individuals) or KYB (for entities) verification?- Once you sign up on the MSU Builder platform and apply for API access, you will be notified that the KYC/KYB process will be handled via email. The MSU team will then guide you through the required verification steps.
- MSU uses a wallet-based identity model. All participants in the official Builder program must complete either KYC (for individuals/teams) or KYB (for entities).
- Currently, only Henesys (Avalanche L1) is supported, with wallet access (e.g., MetaMask) available via Web3Auth. Support for additional chains and wallets is under review.
- Builder accounts can access essential infrastructure services within MSU, but some services are restricted.
- Available services: MSU Marketplace, MSU Navigator, Swap&Warp
- Restricted services: MapleStory N, Smithy
- Builders may use multiple accounts or wallets as long as doing so does not violate MSU policies or create unfair advantages. Each account must be connected to a different wallet.
3. KYC/KYB
Why is KYC/KYB verification required?- KYC/KYB verification is required to ensure a safe and compliant Builder ecosystem. It helps prevent misuse, enables secure transactions, and allows access to advanced features such as monetization.
- KYC (Know Your Customer) is for individual users, while KYB (Know Your Business) is for business entities. The required documents and verification scope differ accordingly.
- Some features are available without verification. However, to access the full range of Builder features — including API usage, app launch, and monetization — you must complete verification.
- After signing up for an account and requesting API access, you will receive a verification link via email. You can then complete KYC or KYB verification through the provided link.
- Verification times may vary depending on the level and review process. In most cases, verification is completed within a few business days, but delays may occur.
- The verification link is sent after your API request is reviewed. This may take some time depending on internal processes.
- If your verification is rejected, you may be asked to submit updated or additional documents for re-verification.
- You can reapply after correcting the issues identified during the verification process. If you are unable to reapply, please contact us for further assistance.
- You will be notified via email once your verification is approved.
- Each level grants different access to features. Level 1 is mainly for testing, while Level 2 enables full access, including production use and monetization.
Feature Level 0 Level 1 Level 2 API Keys ❌ 1 per app 3 per app READ API ❌ ✅ ✅ Action API ❌ ❌ ✅ (only applicable) App Registration & Launch ❌ ❌ ✅ Reward Programs ❌ ❌ ✅ Revenue Claim ❌ ❌ ✅ MSU Marketplace ✅ ✅ ✅ Swap ✅ ✅ ✅ Warp (NXPC) $1,000/day $10,000/day $30,000/day Reactor ✅ ✅ ✅ MapleStory N ❌ ❌ ❌ 1st-party Synergy Apps (e.g. Smithy) ❌ ❌ ❌ NXPC / NESO Transfer ✅ (limit applies) ✅ (limit applies) ✅ (limit applies) NFT / FT Transfer ❌ ✅ ✅ - Level 0 is the default level upon wallet connection and account creation.
- Level 1 is intended for testing and prototyping.
- Level 2 enables production use and monetization of Synergy Apps.
- Warp and Transfer limits are applied as a combined limit.
- Revenue claim is subject to minimum thresholds and settlement policies as defined in the Builder Terms.
- You can upgrade by completing additional verification requirements.
- Features such as API usage, app launch, reward programs, and monetization are restricted until verification is completed.
- No, you only need to complete one type of verification depending on whether you are an individual or a business entity.
- Switching is possible, but you may need to complete KYB verification separately.
- Your data is handled securely and used only for verification and compliance purposes in accordance with applicable policies.
4. API & Development
How can I access and use MSU Open APIs?- After registering on the MSU Builder platform and applying for API access, you will be notified that the remaining steps will be handled via email. The MSU team will then provide detailed guidance through email.
- API usage is subject to rate limits, access scopes, and other restrictions that may vary by verification level. Builders must comply with the Builder Terms, Open API Terms, and any additional guidelines provided by MSU.
- API access may be limited, suspended, or revoked if a Builder violates policies, exceeds usage limits, or poses a risk to the ecosystem.
- Available endpoints include account, character, game meta, and item data (v1rc1). APIs are primarily read-only, with limited metadata write support. For full details, refer to the API documentation.
- Currently, only REST/HTTP APIs are provided.
- No, Webhooks or event streams are not currently provided. Builders should use polling where necessary.
- API keys are scoped per Builder level, with a default rate limit of 1 request/second and 1,000 requests/day. These limits can be increased after Level 2 verification is approved.
- API keys are typically issued within one week.
5. Tech Stack, Hosting & Infrastructure
Are there restrictions on backend or hosting?- There are no restrictions on programming languages, hosting providers, or databases.
- No specific architecture is enforced. Builders should follow industry best practices.
- Current availability is provided on a best-effort basis.
6. Editors & External Platforms
Does MSU Builder provide an editor?- MSU Builder does not provide or endorse any editor. Builders may use their own tools or engines.
- MSU and MapleStory Worlds are independent platforms. MSU Builder does not provide official integration.
7. Rewards & Monetization
Can Builders receive rewards or incentives?- Builders may receive rewards based on their participation in specific programs, such as the affiliate program or other incentive-based initiatives.
- Reward structures, calculation methods, and distribution schedules vary by program. Detailed criteria and processes are provided separately for each program..
- Builders must meet eligibility criteria and comply with all relevant policies. Rewards may be withheld, adjusted, or revoked in cases of policy violations or abnormal activity.
- Supported monetization models and requirements are defined in the Builder Terms.
8. Compliance, Moderation & Content Policy
What policies and content moderation rules must Builders comply with?- Builders must comply with all applicable policies, including the IP Guide, Open API Terms, Builder Terms, and any guidance shared through official channels such as the Builder Forum.
- All content must meet applicable legal, platform, moderation, and age rating standards. Explicit, violent, discriminatory, or otherwise inappropriate material is not permitted and may result in moderation actions.
- Violations may result in content removal, restriction of Builder privileges, or further action depending on the severity of the issue.
- Builders must comply with the IP Guide. The use of MapleStory Universe IP is permitted only within the scope defined by MSU policies and guidelines.
- Monetization is allowed only if it complies with MSU policies, including the IP Guide and any applicable program-specific rules.
- Builders may use original art, animations, audio, and UI assets.
- Use of MapleStory Universe IP requires attribution and may require prior approval. Commercial sale of UGC is prohibited, though ad revenue and donations via free-access platforms are permitted.
9. Support & Communication
Is there a developer community or a place to communicate with other Builders?- The Builder Forum is available for Builders to ask questions, share knowledge, and collaborate.
- Builders can ask questions, share issues, and exchange knowledge through the Builder Forum.
- The forum is the primary communication channel, where Builders can help each other and discuss MSU-related topics.
- Reference applications are not yet available.