B4 Index vs Context7
A side-by-side look at the B4 Index and Context7 MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose B4 Index for developer tools work; choose Context7 for developer tools. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose Context7 when
- You need dedicated capabilities in the Developer Tools domain.
- Its auth model fits you: API key required.
- You want tools like
resolve-library-id, query-docs.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | B B4 Index | |
|---|---|---|
| Category | Developer Tools | Developer Tools |
| Quality signal | 37/100 · Fair | 55/100 · Good |
| Install command | Not confirmed yet | Not confirmed yet |
| Transport | — | — |
| Auth | Not declared | API key required |
| Pricing | Not declared | Free |
| Required env vars | None listed | None listed |
| Verified owner | Community listing | Community listing |
| GitHub stars | — | 63,506 |
| Directory activity | 1 views 0 installs 0 upvotes | 14 views 0 installs 0 upvotes |
| Tools | Not listed | 2 |
| Full listing | View B4 Index | View Context7 |
Tools & capabilities
B4 Index tools
No tool names declared yet. Check the project README from the listing page.
Context7 tools 2
resolve-library-idResolves a general library name into a Context7-compatible library ID.query-docsRetrieves documentation for a library using a Context7-compatible library ID.
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
B4 Index
No confirmed install command for B4 Index yet — follow the setup steps linked from its listing page rather than a guessed package name.
Context7
No confirmed install command for Context7 yet — follow the setup steps linked from its listing page rather than a guessed package name.