Decision Workspace
agent-uri vs qhermes-a2a vs adk-server
Side-by-side comparison of Rust crates
39
agent-uri
experimentalv0.4.0
Parser and validator for agent:// URI scheme
34
qhermes-a2a
experimentalv26.0.0
QHermes 26 — A2A identity and authorization layer (Agent Cards, credential chains, KEM session handshake)
61
adk-server
experimentalv0.9.1
HTTP server and A2A protocol for Rust Agent Development Kit (ADK-Rust) agents
Core Metrics
| agent-uri | qhermes-a2a | adk-server | |
|---|---|---|---|
| Health Score | 39 | 34 | 61 |
| Total Downloads | 143 | 13 | 3.6K |
| 30d Downloads | 0 | 0 | 0 |
| Dependents | 2 | 0 | 66 |
| Releases | 1 | 1 | 26 |
| Last Updated | 110d ago | 68d ago | 2d ago |
| Age | 3m | 2m | 5m |
Health Breakdown
agent-uri
Maintenance
7
Quality
15
Community
7
Popularity
3
Documentation
7
qhermes-a2a
Maintenance
9
Quality
10
Community
6
Popularity
1
Documentation
8
adk-server
Maintenance
20
Quality
11
Community
11
Popularity
4
Documentation
15
Technical Details
| agent-uri | qhermes-a2a | adk-server | |
|---|---|---|---|
| Version | 0.4.0 | 26.0.0 | 0.9.1 |
| Stable (≥1.0) | ✗ No | ✓ Yes | ✗ No |
| License | MIT OR Apache-2.0 | LicenseRef-Copertino-1.0 | Apache-2.0 |
| Dependencies | 6 | 4 | 40 |
| Crate Size | 48KB | 12KB | 1.5MB |
| Features | 3 | 0 | 5 |
| Yanked % | 0.0% | 100.0% | 0.0% |
| Edition | 2024 | 2021 | 2024 |
| MSRV | — | — | 1.85.0 |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •adk-server leads with a health score of 61/100, but none of the options score above 80.
- •agent-uri, adk-server are pre-1.0 — API may change.