| FMRS | 73 / 100 · B | 80 / 100 · B | 79 / 100 · B |
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| Reliability | 10 / 20 | 14 / 20 | 12 / 20 |
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| Security and permissions | 15 / 20 | 16 / 20 | 16 / 20 |
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| Maintenance | 17 / 20 | 17 / 20 | 18 / 20 |
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| Documentation | 18 / 20 | 15 / 20 | 18 / 20 |
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| Setup experience | 13 / 20 | 18 / 20 | 15 / 20 |
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| Best for | - Engineers building or maintaining an MCP server who need to verify protocol behavior
- Teams that want automated regression checks of an MCP server in CI
- Advanced users debugging low-level request/response details, such as custom headers or error codes
| - 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 | - End users who just want to chat with an AI assistant and don't care about the underlying protocol
- Teams wanting a hosted, zero-setup inspection service (it must be run locally or self-hosted)
- Anyone looking for an MCP server that provides business-facing tools to an AI client — Inspector is itself a client/testing tool, not a callable tool server
| - 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 | - Runs Node.js and may spawn a target MCP server as a subprocess when using stdio transport
- Makes outbound network connections to reach MCP servers over streamable-HTTP
- In Web mode, binds a local port (default 6274) and runs a backend capable of spawning processes
- Reads and writes local configuration files (e.g. `--config`/`--catalog` JSON)
| - 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 Web backend can spawn processes; setting `DANGEROUSLY_BIND_ALL_INTERFACES=true` exposes it to the local network, so pair it with an auth token
- Setting `DANGEROUSLY_OMIT_AUTH=true` disables authentication and should only be used in fully trusted environments
- When pointed at an untrusted or malicious MCP server, its responses are proxied and displayed as-is, so the trustworthiness of the server under inspection matters
| - 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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