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Compare MCP servers

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

DimensionAsk LLM Claude MCP ServerRead-only Claude second opinions for non-Claude MCP clients via Claude Code CLIContext7Upstash's official server providing up-to-date third-party library docs for AI coding assistants
FMRS62 / 100 · C80 / 100 · B
Reliability9 / 2014 / 20
Security and permissions13 / 2016 / 20
Maintenance13 / 2017 / 20
Documentation14 / 2015 / 20
Setup experience13 / 2018 / 20
Best for
  • Developers whose primary assistant is Codex, Cursor, or another non-Claude client and who want an independent Claude opinion
  • Read-only, auditable code-review flows (Read/Glob/Grep access only)
  • Users who want to keep context in one session and ask follow-up questions
  • Developers using fast-moving frameworks/libraries worried about the AI suggesting stale code
  • Scenarios wanting zero-config documentation lookup
Not for
  • Scenarios where Claude must edit or write to the codebase
  • Users who want one registration covering all providers (Codex, Grok, Gemini, and so on) — use the unified @ask-llm/mcp package from the same repository
  • Users unwilling to install and authenticate the Claude Code CLI
  • Teams needing official Anthropic support or enterprise guarantees
  • 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
  • Runs locally over stdio and invokes the installed, authenticated Claude Code CLI as a subprocess
  • Read-only workspace access limited to Read, Glob, and Grep
  • Reads the configured environment variables (model alias, fallback model, timeout, log level)
  • Sends prompts and relevant file contents to Claude
  • 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
  • Prompts and file contents leave the machine and are processed by Claude, so sensitive code or secrets need care
  • Automatically invokes the Claude Code CLI, which may consume subscription or API quota
  • The default opus model falls back to sonnet when overloaded, so results may come from a different model than expected
  • Third-party, unofficial project with no affiliation with or endorsement by Anthropic
  • Version 0.0.1, so interfaces and behavior may change
  • get-usage-stats is in-memory only; stats are lost when the process restarts
  • 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, Codex, Cursor, Claude DesktopClaude Code, VS Code, Cursor, Cline, Amp
Tools32