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Compare MCP servers

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

DimensionGrowthBook MCP ServerOfficial GrowthBook MCP server: skill loader + authenticated API passthroughContext7Upstash's official server providing up-to-date third-party library docs for AI coding assistantsNPM Sentinel MCP ServerAI-powered NPM package analysis MCP server
FMRS60 / 100 · C80 / 100 · B79 / 100 · B
Reliability9 / 2014 / 2012 / 20
Security and permissions9 / 2016 / 2016 / 20
Maintenance13 / 2017 / 2018 / 20
Documentation16 / 2015 / 2018 / 20
Setup experience13 / 2018 / 2015 / 20
Best for
  • Teams already using GrowthBook who want agents to manage flags and experiments
  • MCP users who want an authenticated, auditable API passthrough
  • Operators of self-hosted instances
  • 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
Not for
  • Users without GrowthBook
  • Read-only browsing without a GrowthBook API key
  • Environments that cannot tolerate agent-driven mutating API calls
  • 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
Required permissions
  • GB_API_KEY: a GrowthBook API key or personal access token (required, secret)
  • GB_API_URL: API base URL (optional, defaults to https://api.growthbook.io)
  • GB_HTTP_HEADER_*: extra request headers (e.g. Cloudflare Access tokens)
  • 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
Risks and side effects
  • growthbook_call_api is a generic passthrough; POST/PUT/PATCH/DELETE can mutate data, and the confirm-with-user rule is soft guidance, not a hard gate
  • The API key is a sensitive credential that can act on the whole account if leaked
  • HTTP mode should run on a trusted network or loopback; multi-tenant or public deployments should be fronted by your own gateway/auth
  • 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
Supported clientsClaude Code, VS Code, Cursor, Cline, AmpClaude Desktop, VS Code, Cursor, Smithery.ai
Tools3219