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A2A Protocol
A standardized open protocol enabling seamless communication and collaboration between AI agents across different platforms and frameworks.
- Authority
- 50 reach 5 · trust 5 · quality 25 · freshness 15
- Tier
- listed
- llms.txt
- https://a2aprotocol.ai/llms.txt
- llms-full.txt
- https://a2aprotocol.ai/llms-full.txt
- Sections
- 4
- Links
- 18
- Size
- 2743 bytes
- Popularity rank
- #853732
- Country
- — Publisher location unknown; CDN address excluded
- Country evidence
- No published address evidence collected yet
- Categories
- AI and machine learning
- For agents
- Documentation: developer or product docs worth reading, nothing to call
- First seen
- 2026-10-25T18:04:58.596Z
- Last checked
- 2026-10-26T04:37:45.017Z
- Badge
Their llms.txt
The beginning of the file, from our validated copy saved 2026-10-26T04:37:35.689Z. Cached copy · Source on a2aprotocol.ai
# A2A Protocol
> A standardized open protocol enabling seamless communication and collaboration between AI agents across different platforms and frameworks.
The A2A Protocol is Google's Agent2Agent communication standard that solves interoperability challenges in the AI ecosystem. It allows specialized AI agents to work together regardless of their underlying implementation, supporting everything from quick tasks to long-running research with real-time feedback.
## Core Content
- [About A2A](https://a2aprotocol.ai/#about): Universal standard for agent interoperability with enterprise-grade security
- [Features](https://a2aprotocol.ai/#features): Open standard, multi-modal support, agent collaboration, and real-time updates
- [How It Works](https://a2aprotocol.ai/#how-it-works): Capability discovery, task management, and structured communication flows
- [For Developers](https://a2aprotocol.ai/#developers): Code samples, documentation, and implementation guides
## Online Tools
- [Test Agent Card](https://a2aprotocol.ai/a2a-protocol-validator): Online tool to validate if a domain supports the A2A protocol and visualize agent card information. Enter any URL to check for A2A protocol support and parse the agent.json file.
## Technical Resources
- [Documentation](https://a2aprotocol.ai/docs): Complete A2A protocol documentation
- [Python Guide](https://a2aprotocol.ai/docs/guide/python-a2a.html): Python implementation guide
- [TypeScript Guide](https://a2aprotocol.ai/docs/guide/a2a-typescript-guide.html): TypeScript implementation guide
- [A2A vs MCP](https://a2aprotocol.ai/docs/guide/a2a-vs-mcp.html): Detailed comparison with Model Context Protocol
- [Awesome A2A](https://a2aprotocol.ai/docs/guide/awesome-a2a.html): Curated list of A2A resources
- [Understanding A2A](https://a2aprotocol.ai/docs/guide/understanding-a2a-protocol.html): In-depth protocol explanation
- [Sample Methods](https://a2aprotocol.ai/docs/guide/a2a-sample-methods-and-json-responses.html): Comprehensive examples
- [Specification](https://github.com/google/A2A/tree/main/specification/json): Complete A2A protocol specifications
- [Code Samples](https://github.com/google/A2A/tree/main/samples): Implementation examples in various languages
- [Tutorials](https://a2aprotocol.ai/blog): Guides on TypeScript, Python, and JSON implementation
## Educational Resources
- [A2A vs MCP](https://a2aprotocol.ai/blog/a2a-vs-mcp): Understanding how A2A complements the Model Context Protocol
- [Sample Methods](https://a2aprotocol.ai/blog/a2a-sample-methods-and-json-responses): Comprehensive examples of protocol methods and responses
- [Community](https://github.com/google/A2A/discussions): Join discussions and contribute to protocol development
Related sites
Similar publisher descriptions and documentation. Similarity does not imply affiliation or equivalent capabilities.
| Domain | Title | Category | Country | Authority | llms.txt | llms-full.txt | Save |
|---|---|---|---|---|---|---|---|
| a2a-protocol.org | A2A (Agent2Agent) Protocol | documentation AI and machine learning AI agents and MCP +2 | US | 61 | ✓ | ✓ | |
| ag-ui.com | Agent User Interaction Protocol | documentation Developer tools AI agents and MCP +1 | — | 51 | ✓ | ✓ | |
| aimoo.com | Aimoo A2A | interface AI and machine learning AI agents and MCP +1 | — | 61 | ✓ | ✓ | |
| ap2-protocol.org | AP2 - Agent Payments Protocol Documentation | documentation Finance and payments AI and machine learning +2 | — | 55 | ✓ | ✓ | |
| agent-native.com | Agent-Native | interface AI and machine learning Open source projects +2 | — | 56 | ✓ | ✓ | |
| agents-txt.com | agents.txt Standard | documentation AI and machine learning AI agents and MCP +1 | — | 46 | ✓ | ✓ | |
| agentidentityprotocol.io | Agent Identity Protocol | documentation AI and machine learning AI agents and MCP +1 | — | 45 | ✓ | ✓ | |
| aiengineeringfromscratch.com | AI Engineering from Scratch | documentation AI and machine learning Education | US | 48 | ✓ |
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