Both are among the most-installed MCP servers, and people often ask which to pick. It is a false choice: they solve different problems. Here is the distinction, and when each earns its slot.
Context7 — knowledge in, no actions
Context7 injects version-specific documentation for hundreds of frameworks and libraries straight into the prompt. Its job is to stop the model hallucinating outdated APIs.
- Use it when: you write code against fast-moving libraries and want the agent to use the current API, not a 2023 one.
- It does not: touch your repository, open PRs or read your issues. It is read-only knowledge.
GitHub MCP server — actions on your repos
The GitHub server reads and acts on your actual repositories: issues, pull requests, code search, reviews, commits.
- Use it when: you want the agent to triage issues, review a PR, search your codebase or open a change. See GitHub MCP server setup.
- It does not: know the latest docs for a third-party library the way Context7 does.
Side by side
| Context7 | GitHub MCP server | |
|---|---|---|
| Job | Live library docs into context | Act on your GitHub repos |
| Direction | Read-only knowledge | Read + write (issues, PRs) |
| Needs a token | No | Yes (fine-grained PAT) |
| Risk | Low | Scope carefully |
The answer: run both
A strong coding stack uses Context7 for accurate APIs and the GitHub server for repo actions — they complement, not compete. Watch the total tool count, though: Cursor caps at ~40, so trim other servers if both are loaded. See best MCP servers for Cursor and, for the GitHub token, best GitHub MCP server.