Decision Workspace
fdkey vs botcha vs mnem-mcp
Side-by-side comparison of Rust crates
48
fdkey
experimentalv0.1.1
FDKEY verification primitives for MCP servers and HTTP backends — gate AI-agent access behind LLM-only puzzles.
40
botcha
experimentalv0.0.0
Rust SDK for Botcha — the reverse CAPTCHA for AI agents. Coming soon.
56
mnem-mcp
experimentalv0.1.7
Model Context Protocol server for mnem - the AI-native, local-first memory substrate for agents.
Core Metrics
| fdkey | botcha | mnem-mcp | |
|---|---|---|---|
| Health Score | 48 | 40 | 56 |
| Total Downloads | 45 | 16 | 70 |
| 30d Downloads | 0 | 0 | 0 |
| Dependents | 0 | 0 | 3 |
| Releases | 3 | 1 | 4 |
| Last Updated | 15d ago | 72d ago | 4d ago |
| Age | 23d | 2m | 28d |
Health Breakdown
fdkey
Maintenance
13
Quality
12
Community
6
Popularity
2
Documentation
15
botcha
Maintenance
9
Quality
15
Community
5
Popularity
1
Documentation
10
mnem-mcp
Maintenance
16
Quality
15
Community
8
Popularity
2
Documentation
15
Technical Details
| fdkey | botcha | mnem-mcp | |
|---|---|---|---|
| Version | 0.1.1 | 0.0.0 | 0.1.7 |
| Stable (≥1.0) | ✗ No | ✗ No | ✗ No |
| License | MIT | MIT | Apache-2.0 |
| Dependencies | 11 | 0 | 13 |
| Crate Size | 34KB | 986B | 88KB |
| Features | 0 | 0 | 6 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2021 | 2021 | 2024 |
| MSRV | 1.75 | — | 1.95 |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •mnem-mcp leads with a health score of 56/100, but none of the options score above 80.