Decision Workspace
mcp-guard-core vs mcp-guard vs mcp-shield
Side-by-side comparison of Rust crates
44
mcp-guard-core
experimentalv1.0.0
Core library for mcp-guard - A lightweight, high-performance security gateway for MCP servers
45
mcp-guard
experimentalv1.0.0
A lightweight, high-performance security gateway for MCP servers
39
mcp-shield
experimentalv0.7.0
Security proxy for MCP (Model Context Protocol) — auth, rate limiting, payload filtering, and audit logging between AI agents and MCP servers
Core Metrics
| mcp-guard-core | mcp-guard | mcp-shield | |
|---|---|---|---|
| Health Score | 44 | 45 | 39 |
| Total Downloads | 98 | 21 | 21 |
| 30d Downloads | 0 | 0 | 0 |
| Dependents | 1 | 0 | 0 |
| Releases | 1 | 1 | 1 |
| Last Updated | 141d ago | 141d ago | 57d ago |
| Age | 4m | 4m | 1m |
Health Breakdown
mcp-guard-core
Maintenance
6
Quality
14
Community
7
Popularity
2
Documentation
15
mcp-guard
Maintenance
6
Quality
16
Community
6
Popularity
2
Documentation
15
mcp-shield
Maintenance
10
Quality
11
Community
6
Popularity
2
Documentation
10
Technical Details
| mcp-guard-core | mcp-guard | mcp-shield | |
|---|---|---|---|
| Version | 1.0.0 | 1.0.0 | 0.7.0 |
| Stable (≥1.0) | ✓ Yes | ✓ Yes | ✗ No |
| License | AGPL-3.0 | AGPL-3.0 | Apache-2.0 |
| Dependencies | 51 | 15 | 24 |
| Crate Size | 148KB | 50KB | 81KB |
| Features | 3 | 1 | 0 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2021 | 2021 | 2024 |
| MSRV | 1.75 | 1.75 | — |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •mcp-guard leads with a health score of 45/100, but none of the options score above 80.
- •mcp-guard-core has the most downloads (98), suggesting wider adoption.
- •mcp-shield is pre-1.0 — API may change.