A2A Protocol Technical Update — 2026/03/20
Version Status
- Latest Version: v1.0.0
- Release Date: 2025 (Linux Foundation)
- Official Website: https://a2a-protocol.org
Technical Highlights
1. Version 1.0 Official Release
A2A Protocol announces the release of Version 1.0, becoming the first open standard for agent-to-agent communication. The protocol is now governed by the Linux Foundation after being donated by Google in June 2025.
2. Stricter Protocol Specifications
A2A v1.0 has moved from early draft-era conventions to a more formal release-candidate model. The protocol is now stricter and more explicit across JSON-RPC, gRPC, and REST mappings. The protobuf model (a2a.proto) is the canonical definition source.
3. Multi-Language SDK Support
The community is now focused on delivering multi-language v1.0 SDK support to help developers build conformant solutions with ease.
4. Enhanced Security & Opaque Communication
Agents can interact without sharing internal memory, tools, or proprietary logic, ensuring security and preserving intellectual property.
Ecosystem Updates
Major Partners
The A2A Protocol has garnered support from 50+ technology partners, including:
- Enterprise Giants: Salesforce, SAP, ServiceNow, Workday, UKG
- Cloud & AI Leaders: Google, Microsoft, Cisco
- Developer Frameworks: LangChain, Cohere, Intuit
Integration Ecosystem
- IBM ACP: Incorporated into the A2A Protocol
- Cisco agntcy: Leverages A2A and MCP
- Microsoft Copilot: Agentic integration with SAP, ServiceNow, Salesforce
Source: a2a-protocol.org
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