Decision Workspace
fastmcp-protocol vs vexil-lang vs turbomcp-wire
Side-by-side comparison of Rust crates
52
fastmcp-protocol
experimentalv0.2.0
MCP protocol types and JSON-RPC implementation
57
vexil-lang
experimentalv0.2.4
Compiler library for the Vexil schema definition language — lexer, parser, IR, and type checker
56
turbomcp-wire
experimentalv3.0.10
Wire format codec abstraction for TurboMCP - JSON-RPC encoding/decoding
Core Metrics
| fastmcp-protocol | vexil-lang | turbomcp-wire | |
|---|---|---|---|
| Health Score | 52 | 57 | 56 |
| Total Downloads | 399 | 132 | 295 |
| 30d Downloads | 275 | 135 | 166 |
| Dependents | 12 | 19 | 19 |
| Releases | 2 | 6 | 19 |
| Last Updated | 40d ago | today | 1d ago |
| Age | 1m | 1d | 2m |
Health Breakdown
fastmcp-protocol
Maintenance
12
Quality
13
Community
9
Popularity
3
Documentation
15
vexil-lang
Maintenance
19
Quality
13
Community
10
Popularity
3
Documentation
12
turbomcp-wire
Maintenance
13
Quality
18
Community
10
Popularity
3
Documentation
12
Technical Details
| fastmcp-protocol | vexil-lang | turbomcp-wire | |
|---|---|---|---|
| Version | 0.2.0 | 0.2.4 | 3.0.10 |
| Stable (≥1.0) | ✗ No | ✗ No | ✓ Yes |
| License | MIT | MIT OR Apache-2.0 | MIT |
| Dependencies | 5 | 4 | 8 |
| Crate Size | 49KB | 62KB | 13KB |
| Features | 0 | 0 | 6 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2024 | 2021 | 2024 |
| MSRV | 1.85 | 1.94 | 1.89.0 |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •vexil-lang leads with a health score of 57/100, but none of the options score above 80.
- •fastmcp-protocol has the most downloads (399), suggesting wider adoption.
- •fastmcp-protocol, vexil-lang are pre-1.0 — API may change.