| FMRS | 42 / 100 · D | 80 / 100 · B | 79 / 100 · B |
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| Reliability | 6 / 20 | 14 / 20 | 12 / 20 |
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| Security and permissions | 10 / 20 | 16 / 20 | 16 / 20 |
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| Maintenance | 8 / 20 | 17 / 20 | 18 / 20 |
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| Documentation | 10 / 20 | 15 / 20 | 18 / 20 |
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| Setup experience | 8 / 20 | 18 / 20 | 15 / 20 |
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| Best for | - Developers using MCP-compatible clients like Cursor, VS Code, Claude Desktop.
- Teams that want to manage CircleCI pipelines seamlessly within their IDE.
- Developers needing quick diagnostics for build failures and test issues.
| - 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 the latest features and security updates, as the package is deprecated and unmaintained.
- Users seeking a hosted solution; CircleCI's hosted MCP server is recommended.
- Users needing public remote access unless deploying a self-managed remote server with extra security.
| - 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 | - Requires a CircleCI Personal API token (CIRCLECI_TOKEN) with read access to projects.
- In remote mode, requires configuring allowed hosts (MCP_ALLOWED_HOSTS) and authentication.
- File-related tools may read/write files; set MCP_FILE_OUTPUT_ROOTS to restrict root directories.
| - 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 | - Token exposure: if the personal or shared token leaks, unauthorized operations may occur.
- Deprecation risk: the server is no longer maintained, potentially with security or compatibility issues.
- Remote mode risk: if authentication is disabled (REQUIRE_REQUEST_TOKEN=false), anyone reaching the port can act on the server.
| - 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 | Cursor, VS Code, Claude Desktop, Claude Code, Windsurf, Amazon Q Developer | Claude Code, VS Code, Cursor, Cline, Amp | Claude Desktop, VS Code, Cursor |
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| Tools | 13 | 2 | 19 |
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