| FMRS | 52 / 100 · D | 80 / 100 · B | 79 / 100 · B |
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| Reliability | 8 / 20 | 14 / 20 | 12 / 20 |
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| Security and permissions | 9 / 20 | 16 / 20 | 16 / 20 |
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| Maintenance | 10 / 20 | 17 / 20 | 18 / 20 |
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| Documentation | 13 / 20 | 15 / 20 | 18 / 20 |
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| Setup experience | 12 / 20 | 18 / 20 | 15 / 20 |
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| Best for | - Developers writing Unreal Engine C++ with AI agents
- Teams wanting to cut token usage and avoid API hallucinations
- UE5 projects that must handle the latest deprecations and version differences
- Developers working in MCP-compatible tools such as Claude Code, Cursor, or Windsurf
| - Developers using fast-moving frameworks/libraries worried about the AI suggesting stale code
- Scenarios wanting zero-config documentation lookup
| - Developers auditing NPM dependencies within AI workflows
- Teams performing supply chain security assessments
- Users of Claude Desktop, Cursor, or VS Code
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| Not for | - Users needing third-party plugin or marketplace asset APIs (not indexed)
- Projects using engines other than Unreal Engine
- Users who want a graphical interface rather than agent-driven lookups
- Users requiring official Epic Games support or endorsement
| - Looking up internal/private codebase documentation (Context7 targets publicly published open-source libraries)
- Cases needing very high coverage of obscure, niche libraries (coverage depends on what Context7's platform has indexed)
| - Projects outside the NPM ecosystem (e.g., pure Python/Go)
- Environments without network access to deps.dev, OSV.dev, and the npm registry
- Scenarios requiring maintenance by an official upstream vendor
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| Required permissions | - Local file system access: to auto-detect the engine version from .uproject and to read/write the database cache in ~/.unreal-api-mcp/
- Network access: to download the version-specific database from GitHub on first run and to check for updates on startup
| - Usable without an API key (subject to a free-tier rate limit); CONTEXT7_API_KEY is an optional credential for higher quota
- Read-only documentation lookup — no code execution or local filesystem access involved
| - Network access to the NPM registry and external services (deps.dev, OSV.dev, OpenSSF, npms.io, GitHub)
- Read access to workspace lockfiles (pnpm-lock.yaml, package-lock., yarn.lock) for cache invalidation
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| Risks and side effects | - The first run needs internet access to download the database; restricted networks may fail
- If neither UNREAL_VERSION nor UNREAL_PROJECT_PATH is set, it may serve a version that differs from your actual project and return APIs for the wrong engine version
- Only engine and built-in plugin APIs are covered, so third-party queries return nothing and may mislead an agent into thinking an API does not exist
- Maintained by a third-party developer, not an official Epic Games project, and offers no official support
- Although licensed under MIT, commercial use requires additional permission
| - The free tier has limited quota — high-frequency use may hit rate limits
- Documentation content comes from Context7's platform index, so its accuracy and freshness depend on that platform's crawl cadence
| - Third-party READMEs and changelogs are untrusted external content; they are wrapped in tags with _meta flags but should still be handled cautiously
- Depends on availability and accuracy of external services
- Batch requests are capped at 25 packages to prevent registry enumeration; larger sets require batching
- Third-party open source project, not officially maintained by NPM or Anthropic
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| Supported clients | Claude Code, Cursor, Windsurf | Claude Code, VS Code, Cursor, Cline, Amp | Claude Desktop, VS Code, Cursor, Smithery.ai |
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| Tools | 5 | 2 | 19 |
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