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a2a-protocol-types
v0.6.0 ExperimentalAgent2Agent (A2A) protocol v1.0 — pure data types, serde only, no I/O
Apache-2.0 Edition 2021 MSRV 1.93
Quick Verdict
- ✓Actively maintained (updated 33d ago)
- !Pre-1.0: API may have breaking changes
- ✓Permissive license (Apache-2.0)
Security
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Downloads
7.2K
Dependents
54
Releases
9
Size
79KB
Deep Insights
📈
Strong growth momentum
5.7K downloads in the last 30 days (190/day), up 494% from the previous period.
⚠️
Notable yanked versions
11% of releases have been yanked. Check version history before pinning.
🌟
Used by top crates
Notable dependents include adk-server, a2a-protocol-server, a2a-protocol-client, a2a-protocol-sdk. When high-quality crates choose a2a-protocol-types, it's a strong quality signal.
Health Breakdown
Maintenance 17/25
Recency, release consistency, active ratio
Quality 9/25
Yanked ratio, deps, size, maturity, features
Community 10/20
Reverse deps, ownership, ecosystem
Popularity 5/15
Downloads, momentum, growth trend
Documentation 15/15
Docs, repo, license, metadata
Download Trend
Daily downloads · last 90 days
75/day avg+363%
Top Dependents
Most downloaded crates that depend on a2a-protocol-types
Version Adoption
v0.5.0
92%
v0.6.0
6%
v0.3.1
1%
v0.3.3
0%
v0.3.2
0%
Release Timeline
9 releases1 yankedsince 2026
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2026
9
LessMore|Yanked
Feature Flags
signing
README
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Maintainers
Dependencies
8
direct dependencies
Dependents
54
crates depend on a2a-protocol-types