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Compare MCP servers

Compare scores, permissions, risks, and fit in one decision-focused table.

DimensionContextStream MCP ServerPersistent memory and semantic code search for AI coding assistantsContext7Upstash's official server providing up-to-date third-party library docs for AI coding assistants
FMRS73 / 100 · B80 / 100 · B
Reliability10 / 2014 / 20
Security and permissions15 / 2016 / 20
Maintenance15 / 2017 / 20
Documentation18 / 2015 / 20
Setup experience15 / 2018 / 20
Best for
  • Developers on long-running projects using Claude Code, Cursor, Windsurf, or similar tools
  • Teams needing cross-session memory and codebase understanding
  • Developers using fast-moving frameworks/libraries worried about the AI suggesting stale code
  • Scenarios wanting zero-config documentation lookup
Not for
  • Users unwilling to index code to a cloud service
  • One-off scripts that need no persistent context
  • 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)
Required permissions
  • Requires a ContextStream API key (secret env var)
  • Reads and indexes project code files
  • Optionally connects GitHub, Slack, and Notion integrations
  • Writes MCP configs, rules, and lifecycle hooks into editor settings
  • 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
Risks and side effects
  • Indexed code is stored in ContextStream's cloud (vendor states isolation per workspace)
  • A leaked API key could expose workspace data
  • Breaking changes with @modelcontextprotocol/sdk 1.28.0+
  • Hosted HTTP OAuth may be blocked on corporate networks
  • 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
Supported clientsClaude Code, Cursor, Windsurf, Cline, Roo Code, VS Code + GitHub Copilot, Kilo Code, Codex, OpenCode, Aider, Antigravity, Claude DesktopClaude Code, VS Code, Cursor, Cline, Amp
Tools172