Comparison
agent-protocol vs langgraph4j
Verdict
Pick agent-protocol if agent-protocol provides a standardized interface for interacting with various AI agents regardless of their underlying tech stack, aiming to ease development, deployment, and benchmarking; pick langgraph4j if langGraph4j is a Java library for developing AI-agentic architectures that integrates seamlessly with Langchain4j and Spring AI.
Markdown twin · agent-protocol alternatives · langgraph4j alternatives
GraphCanon updated Sep 20, 2026
10views this month
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Trust & integrity
| Signal | agent-protocol | langgraph4j |
|---|---|---|
| Maintenance | Dormant (515d since push) As of Sep 5, 2026 · github_public_v1 | Very active (1d since push) As of Sep 17, 2026 · github_public_v1 |
| Provenance | Not a fork · Organization account As of Sep 5, 2026 · github_public_v1 | Not a fork · Organization account As of Sep 17, 2026 · github_public_v1 |
| OSV dependency advisories | Published findings As of Jul 11, 2026 · osv@v1 | No lockfile (source not queried) As of Jul 15, 2026 · osv@v1 |
| deps.dev advisories | Not queried deps.dev@v1 | Not queried deps.dev@v1 |
| OpenSSF Scorecard | Not queried openssf-scorecard@v1 | Not queried openssf-scorecard@v1 |
Tagline
- agent-protocol
- Common interface for AI agents
- langgraph4j
- A library for developing AI Agentic Architectures in Java
Stars
- agent-protocol
- 1.5k
- langgraph4j
- 2.0k
Forks
- agent-protocol
- 186
- langgraph4j
- 280
Open issues
- agent-protocol
- 49
- langgraph4j
- 25
Language
- agent-protocol
- Python
- langgraph4j
- Java
Adopt for
- agent-protocol
- agent-protocol provides a standardized interface for interacting with various AI agents regardless of their underlying tech stack, aiming to ease development, deployment, and benchmarking.
- langgraph4j
- LangGraph4j is a Java library for developing AI-agentic architectures that integrates seamlessly with Langchain4j and Spring AI.
Persona
- agent-protocol
- -
- langgraph4j
- -
Runtime
- agent-protocol
- -
- langgraph4j
- -
License
- agent-protocol
- MIT
- langgraph4j
- MIT License
Last pushed
- agent-protocol
- Apr 8, 2025
- langgraph4j
- Sep 15, 2026
Categories
- agent-protocol
- AI Agents
- langgraph4j
- AI Agents
Trust and health
Maintenance
- agent-protocol
- Dormant (18%)
- langgraph4j
- Very active (96%)
Days since push
- agent-protocol
- 515d
- langgraph4j
- 1d
Open issues (now)
- agent-protocol
- 49
- langgraph4j
- 25
Stars delta
- agent-protocol
- -4 (30d)
- langgraph4j
- +98 (30d)
Open issues delta
- agent-protocol
- -1 (30d)
- langgraph4j
- +1 (30d)
OSV dependency advisories
- agent-protocol
- Published findings
- langgraph4j
- No lockfile (source not queried)
Full report
- agent-protocol
- Trust report
- langgraph4j
- Trust report
Choose agent-protocol if…
- agent-protocol is primarily Python; langgraph4j is Java.
- Tags unique to agent-protocol: ai-agent, api, auto-gpt, gpt-4.
- When you want to ensure interoperability between different AI agents irrespective of the frameworks used by them.
When NOT to use agent-protocol
- If you are developing an isolated system with no intention to communicate or integrate with other AI agents outside this scope.
- When working in environments where specific, proprietary interfaces provide significantly better performance or features than adhering to a generic protocol could offer.
Choose langgraph4j if…
- langgraph4j is primarily Java; agent-protocol is Python.
- Pricing: Available at no cost; commercial support and enterprise options may incur additional charges..
- Requirements: Min 1 GB RAM.
- Tags unique to langgraph4j: ai, langchain4j, spring-ai, workflow.
- When you are building an application in the Java ecosystem that requires integration with both Langchain4j and Spring AI.
When NOT to use langgraph4j
- Avoid using it if your project strictly limits external dependency versions and necessitates an older version of Java (prior to 17), as LangGraph4j demands at least Java 17.
- If you require the absolute latest features before official release, direct snapshot use might pose instability risks that could disrupt development cycles or production environments.
Explore
Sources
Every stat on this page traces to a dated GitHub sync, license file, enrichment field, or trust scan.
- GitHub stars (agi-inc/agent-protocol) · observed Sep 20, 2026
- GitHub forks (agi-inc/agent-protocol) · observed Sep 20, 2026
- Last push (agi-inc/agent-protocol) · observed Apr 8, 2025
- License file (MIT) · observed Sep 20, 2026
- Decision facts (enrichment) · observed Jul 16, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
- GitHub stars (langgraph4j/langgraph4j) · observed Sep 20, 2026
- GitHub forks (langgraph4j/langgraph4j) · observed Sep 20, 2026
- Last push (langgraph4j/langgraph4j) · observed Sep 15, 2026
- License file (MIT) · observed Sep 20, 2026
- Decision facts (enrichment) · observed Jul 17, 2026
- Trust scan (lockfile / OSV) · observed Jul 15, 2026
GitHub stars on cards: agent-protocol 1.5k · langgraph4j 2.0k (synced Sep 20, 2026).
Common questions
- What is the difference between agent-protocol and langgraph4j?
- agent-protocol: Common interface for AI agents. langgraph4j: A library for developing AI Agentic Architectures in Java. See the comparison table for live GitHub stats and shared categories.
- When should I choose agent-protocol over langgraph4j?
- Choose agent-protocol over langgraph4j when agent-protocol is primarily Python; langgraph4j is Java; Tags unique to agent-protocol: ai-agent, api, auto-gpt, gpt-4; When you want to ensure interoperability between different AI agents irrespective of the frameworks used by them.
- When should I choose langgraph4j over agent-protocol?
- Choose langgraph4j over agent-protocol when langgraph4j is primarily Java; agent-protocol is Python; Pricing: Available at no cost; commercial support and enterprise options may incur additional charges.; Requirements: Min 1 GB RAM; Tags unique to langgraph4j: ai, langchain4j, spring-ai, workflow; When you are building an application in the Java ecosystem that requires integration with both Langchain4j and Spring AI.
- When should I avoid agent-protocol?
- If you are developing an isolated system with no intention to communicate or integrate with other AI agents outside this scope. When working in environments where specific, proprietary interfaces provide significantly better performance or features than adhering to a generic protocol could offer.
- When should I avoid langgraph4j?
- Avoid using it if your project strictly limits external dependency versions and necessitates an older version of Java (prior to 17), as LangGraph4j demands at least Java 17. If you require the absolute latest features before official release, direct snapshot use might pose instability risks that could disrupt development cycles or production environments.
- Is agent-protocol or langgraph4j more popular on GitHub?
- langgraph4j has more GitHub stars (2,006 vs 1,454). Stars measure visibility, not whether either tool fits your constraints.
- Are agent-protocol and langgraph4j open source?
- Yes - both are open-source projects on GitHub (agent-protocol: MIT, langgraph4j: MIT).
- Where can I find alternatives to agent-protocol or langgraph4j?
- GraphCanon lists graph-backed alternatives at agent-protocol alternatives and langgraph4j alternatives (agent-protocol markdown twin, langgraph4j markdown twin), ranked by typed relationship edges rather than popularity votes.
- Is there a machine-readable version of this comparison?
- Yes. The markdown twin at this comparison mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers.
- Which is better maintained, agent-protocol or langgraph4j?
- agent-protocol: Dormant. langgraph4j: Very active. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance.
- Where are the full trust reports for agent-protocol and langgraph4j?
- GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: agent-protocol trust report; langgraph4j trust report.