| FMRS | 60 / 100 · C | 80 / 100 · B | 79 / 100 · B |
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| Reliability | 8 / 20 | 14 / 20 | 12 / 20 |
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| Security and permissions | 12 / 20 | 16 / 20 | 16 / 20 |
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| Maintenance | 12 / 20 | 17 / 20 | 18 / 20 |
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| Documentation | 15 / 20 | 15 / 20 | 18 / 20 |
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| Setup experience | 13 / 20 | 18 / 20 | 15 / 20 |
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| Best for | - MCP server developers who need rich interactive UI inside tool call results
- Teams already using hosts that support the MCP Apps extension (Claude, ChatGPT, VS Code, Goose, Postman)
- Developers who want official spec-compliant starter templates across multiple front-end frameworks (React, Vue, Svelte, Preact, Solid, vanilla JS)
| - 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 looking for a single ready-to-use MCP server/tool — this repo is a protocol spec, SDK, and example collection, not one server
- Setups where the client host doesn't support the MCP Apps extension (README states host support varies)
- Anyone needing a production-supported, officially maintained host implementation — README explicitly says there's no supported host in the repo beyond the reference basic-host example
| - 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 | - The spec/SDK itself carries no inherent permissions; specific permissions depend on which example server is used (e.g., the system-monitor example reads local OS metrics, the video-resource example serves binary media resources)
- README does not provide a complete permissions manifest for any single server
| - 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 | - UI content runs as server-supplied HTML inside a sandboxed iframe on the host — the actual isolation and trust boundary depend on the specific host implementation, not on this repo
- The spec has both a stable 2026-01-26 version and an actively developed draft version, so interfaces may change as the spec evolves
- License labeling is inconsistent — the README badge shows Apache 2.0 while the repo's catalog metadata records NOASSERTION — verify actual license terms before use
| - 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, VS Code, Cursor, Cline, Amp | Claude Desktop, VS Code, Cursor, Smithery.ai |
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| Tools | 0 | 2 | 19 |
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