Decision Workspace
ucp-agent vs jamjet-engram vs mcp-memory
Side-by-side comparison of Rust crates
49
ucp-agent
experimentalv0.1.18
Agent graph traversal system for UCP knowledge graphs
49
jamjet-engram
experimentalv0.5.0
Engram — durable memory layer for AI agents. Temporal knowledge graph, semantic search, and MCP-native tools.
44
mcp-memory
experimentalv5.2.1
MCP server giving LLM agents persistent memory: a SQLite knowledge graph with FTS5 search, tree-sitter code indexing (10 languages) with semantic code search, and optional vector + hybrid search (usearch HNSW or IVF-Flat) with batch upsert, more-like-this, recommendations, and MMR diversification
Core Metrics
| ucp-agent | jamjet-engram | mcp-memory | |
|---|---|---|---|
| Health Score | 49 | 49 | 44 |
| Total Downloads | 219 | 112 | 444 |
| 30d Downloads | 0 | 0 | 0 |
| Dependents | 7 | 3 | 0 |
| Releases | 7 | 3 | 26 |
| Last Updated | 116d ago | 92d ago | 3d ago |
| Age | 5m | 3m | 27d |
Health Breakdown
ucp-agent
Maintenance
14
Quality
12
Community
8
Popularity
3
Documentation
12
jamjet-engram
Maintenance
14
Quality
12
Community
8
Popularity
2
Documentation
13
mcp-memory
Maintenance
13
Quality
13
Community
5
Popularity
3
Documentation
10
Technical Details
| ucp-agent | jamjet-engram | mcp-memory | |
|---|---|---|---|
| Version | 0.1.18 | 0.5.0 | 5.2.1 |
| Stable (≥1.0) | ✗ No | ✗ No | ✓ Yes |
| License | MIT | Apache-2.0 | Apache-2.0 |
| Dependencies | 15 | 11 | 39 |
| Crate Size | 38KB | 80KB | 206KB |
| Features | 0 | 0 | 2 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2021 | 2021 | 2024 |
| MSRV | 1.75 | — | — |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •ucp-agent leads with a health score of 49/100, but none of the options score above 80.
- •mcp-memory has the most downloads (444), suggesting wider adoption.
- •ucp-agent, jamjet-engram are pre-1.0 — API may change.