Context7
UpstashServes version-specific documentation for thousands of libraries, so an agent stops writing code against an API that changed two releases ago
Context7 vs Mastra Docs MCP
Serves version-specific documentation for thousands of libraries, so an agent stops writing code against an API that changed two releases ago On the other side: serves current mastra documentation, changelogs, and examples to the agent, which is the difference between working code and plausible code when a framework ships weekly
Installnpx -y @upstash/context7-mcpnpx -y @mastra/mcp-docs-server
SourceCommunityOfficial
Deciding factorThe agent touches many libraries and keeps citing outdated APIs.versus: You standardised on one framework and want its current API surface.
Bottom line
Mastra if you write Mastra; Context7 for everything else.
The short answer
Context7 serves version-specific docs for thousands of libraries; Mastra's server serves one framework very well. Broad coverage catches more versions but returns a feed rather than a curated answer. If you write Mastra, the narrow one wins; if you write everything, the broad one does.
Facts
| Option | Install | Source | Link |
|---|---|---|---|
| Context7 | npx -y @upstash/context7-mcp | Community | Repository ↗ |
| Mastra Docs MCP | npx -y @mastra/mcp-docs-server | Official | Repository ↗ |
Pick Context7 if
The agent touches many libraries and keeps citing outdated APIs.
Pick Mastra Docs MCP if
You standardised on one framework and want its current API surface.
What would change our mind
A project going archived, or a maintainer changing the install path, flips this comparison faster than any feature release. Both entries are re-checked weekly, and the date above tells you how much to trust the details.
Read the full entries
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