| FMRS | 51 / 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 | 7 / 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 | 13 / 20 | 18 / 20 | 15 / 20 |
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| Best for | - Developers and teams who want to integrate existing REST APIs described by OpenAPI into the MCP ecosystem.
- Scenarios where you need quick conversion of APIs to MCP tools with dynamic tool generation.
| - 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 | - APIs without OpenAPI specifications (would need manual generation or conversion).
- Use cases requiring fine-grained control over each tool's behavior (this server is generic and spec-driven).
- APIs with complex authentication flows (e.g., OAuth) unless handled manually via custom headers and EXTRA_HEADERS.
| - 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 | - Access to the OpenAPI spec URL (HTTP or local file).
- API keys or tokens for the target API (via API_KEY or custom headers).
- Read/write permissions to the target API depending on exposed tools.
| - 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 | - Exposing many tools may consume tokens or degrade performance; use TOOL_WHITELIST to limit.
- Credentials are passed via environment variables; ensure secure configuration.
- Remote spec downloads can be slow or fail, causing startup issues (mitigated by caching).
- Some clients have incomplete prompts/resources support; features may be limited.
| - 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 Desktop, Codex, Gemini, Qwen, Kilocode, OpenCode, Vibe, Letta | Claude Code, VS Code, Cursor, Cline, Amp | Claude Desktop, VS Code, Cursor |
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| Tools | 0 | 2 | 19 |
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