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Context7 vs Microsoft Learn MCP Server
Context7 exposes 2 tools and adds about 1,188 tokens to every model turn. Microsoft Learn exposes 3 tools and adds about 1,016. Measured by connecting to each server and counting its tool list, not from the README.
 Context7upstash |  Microsoft Learnmicrosoftdocs | |
|---|---|---|
| Context tax | ~1,188 tok/turn | ~1,016 tok/turn(leaner) |
| Tools | 2 | 3 |
| Cost per 1,000 turns (Claude Sonnet 5.5, uncached) | $2.38 | $2.03 |
| Security score | 100/100 | 100/100 |
| Cold start | — | — |
| Runs | Local or hosted | Local or hosted |
| Needs keys | CONTEXT7_API_KEY | None declared |
| Freshness | Active | Maintained |
| GitHub stars | 63k | 2.0k |
| License | MIT | CC-BY-4.0 |
| Official MCP registry | Yes | Yes |
Install in Claude Code
Context7
claude mcp add context7 -e CONTEXT7_API_KEY='<context7-api-key>' -- npx -y @upstash/context7-mcp
Microsoft Learn
claude mcp add microsoftdocs -- npx -y @microsoft/learn-cli
Tools
By name, from each server's live tool list. The same name can still behave differently.
Only in Context7 · 2
- resolve-library-id
- query-docs
In both · 0
- none
Only in Microsoft Learn · 3
- microsoft_docs_search
- microsoft_code_sample_search
- microsoft_docs_fetch
Questions
- Which uses fewer tokens, Context7 or Microsoft Learn?
- Microsoft Learn: its tool definitions take about 1,016 tokens per turn against 1,188 for Context7 (1.2× more). Tool definitions are resent on every model turn.
- Do Context7 and Microsoft Learn have the same tools?
- No tool names overlap: Context7 has 2 tools and Microsoft Learn has 3.
- Are Context7 and Microsoft Learn hosted or local?
- Context7: local or hosted. Microsoft Learn: local or hosted.
Token counts use the o200k tokenizer on each server's tool definitions as an agent receives them; clients that load tools lazily pay less. Prices are Claude Sonnet 5.5 input at $2/MTok. Want to check one yourself? Run npx mcpskillhub test <package> — how it works.