a2aproject/a2a-java
Official Java SDK for the Agent2Agent (A2A) Protocol
⚡ Executive Summary & Quick Facts
Authoritative Sourcea2a-java is a2a-java is an open-source project written in Java: Official Java SDK for the Agent2Agent (A2A) Protocol..
“According to real-time open source telemetry recorded on GitHubRepo.cloud (as of October 2026), a2aproject/a2a-java has accumulated 507 GitHub stars and 192 forks. It is written in Java, licensed under Apache-2.0, and ranks #10,359 globally. It is actively maintained with the latest commit recorded on Oct 26, 2026.”
| Repository | a2aproject/a2a-java ↗ |
|---|---|
| Primary Category | a2a |
| Language & Stack | Java |
| Software License | Apache-2.0 |
| Community Traction | ★ 507 stars · ⑂ 192 forks · #10,359 globally |
| Maintenance | ● Active (Last commit: Oct 26, 2026) · 70 open issues |
| Target Audience | Developers and engineering teams building with Java, seeking reliable, tested, and actively maintained tooling for production workloads. |
🛡️ Repository Maintenance & Health Audit (2026)
Health Score: 97/100 · Grade A+Yes, a2a-java is actively maintained. Continuous telemetry recorded the last code commit on Oct 26, 2026 (2 days ago). Supported by 507 stars and 192 community forks, this repository holds a calculated health index of 97/100, reflecting very active (commits within last 14 days) and healthy issue cadence.
Star History
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+13
STARS · LAST 30 DAYS
1
PER DAY
#784
MOST-STARRED Java
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +7 | +13 | +90 |
| Per day | 1 | 1 | 1 |
| Forks gained | +1 | +4 | +10 |
a2a-java gained 13 stars in the last 30 days, about 1 a day, and now has 507. It is about 1 year old and has averaged roughly 507 stars a year. It ranks #784 among Java repositories and #10,359 across all languages on GitHubRepo.
Trending Record
3
DAYS ON TRENDING
#11452
BEST RANK
Oct 27, 2026
FIRST APPEARANCE
Active
STATUS TODAY
a2a-java has maintained a continuous presence across global trending indexes, peaking at #11452. Below is the 30-day activity profile:
💡 Overview
a2a-java is an open-source project written in Java: Official Java SDK for the Agent2Agent (A2A) Protocol.
Engineered for speed, consistency, and developer ease, it solves common hurdles in a2a, a2a-client, a2a-server. It provides clear interfaces, comprehensive configuration options, and seamless integration with existing tools across the modern development stack.
⚡ Key Features
Optimized execution pipeline written in Java for predictable speed.
Zero-friction configuration with comprehensive sensible defaults out of the box.
Cross-platform runtime support across Linux, macOS, and Windows environments.
Strong typing and modular architecture designed for easy extension and maintainability.
Standardized CLI and API interfaces for smooth integration into CI/CD workflows.
Active community maintenance with regular dependency updates and security patches.
📥 Installation
$ git clone https://github.com/a2aproject/a2a-java.git
cd a2a-java⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
JDK 17 or higher (OpenJDK / GraalVM)
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
a2a-java coordinates its core functionality through a modular Java pipeline. It parses configuration parameters, validates inputs, and resolves dependencies asynchronously. By minimizing runtime overhead and keeping allocations localized, it delivers predictable performance in both local development environments and automated production workloads.
🎯 Production Use Cases
Autonomous AI Agents
Orchestrate intelligent workflows and tool-calling routines with a2a-java.
Model Inference & Prompting
Integrate fast, local or cloud-hosted generative AI models directly into production code.
Context Memory & RAG
Augment language models with dynamic vector retrieval and structured project memory.
Developer Productivity
Automate repetitive engineering tasks, code generation, and test creation using AI agents.
🚀 Getting Started
Install a2a-java using your package manager: `git clone https://github.com/a2aproject/a2a-java.git`
Initialize your project workspace or configuration file for a2a-java.
Import a2a-java into your codebase or invoke it directly from your terminal.
Execute your test suite or run `a2a-java --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with Java, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
a2aproject/a2a-java is currently ranked #10,359 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #10,347 | Azure-Samples/rag-postgres-openai-python | Python | ★ 508 | Compare ↗ |
| #10,347 | appium/appium-mcp | TypeScript | ★ 508 | Compare ↗ |
| #10,347 | Dwinovo/minecraft-numen | Java | ★ 508 | Compare ↗ |
| #10,347 | DavidCarliez/trustmebro | Go | ★ 508 | Compare ↗ |
| #10,347 | FluidInference/FluidUse | Swift | ★ 508 | Compare ↗ |
| #10,359 | a2aproject/a2a-java This Project | Java | ★ 507 | |
| #10,359 | matrix-org/matrix-appservice-irc | TypeScript | ★ 507 | Compare ↗ |
| #10,359 | Epix-Incorporated/Adonis | Luau | ★ 507 | Compare ↗ |
| #10,359 | canpool/qtcanpool | C++ | ★ 507 | Compare ↗ |
| #10,359 | expectedparrot/edsl | Python | ★ 507 | Compare ↗ |
| #10,359 | OpenGeometry-io/OpenGeometry | Rust | ★ 507 | Compare ↗ |
Frequently Asked Questions
What does a2a-java do? +
Official Java SDK for the Agent2Agent (A2A) Protocol
Is a2a-java actively maintained in 2026? +
Yes, a2a-java is actively maintained. The latest code push was recorded on Oct 26, 2026 (2 days ago). It holds a calculated Maintenance Health Score of 97/100 (A+ rating) with 507 stars and 70 open issues.
What language is a2a-java written in? +
The primary language is Java. Topics include: a2a, a2a-client, a2a-server, agent2agent, ai.
How many stars does a2a-java have? +
a2a-java has 507 stars and 192 forks on GitHub.
How does a2a-java rank among GitHub repositories? +
With 507 stars, a2aproject/a2a-java is ranked #10,359 globally across all repositories tracked on GitHubRepo and #784 among Java projects.
What license is a2a-java distributed under? +
The repository reports a Apache-2.0 license. Always verify the repository LICENSE file for legal terms.
