Agent Card仕様書が語りきれなかった実践の詳細。
v1.0仕様に準拠したA2Aディスカバリーのフィールドレベル実践ガイド。各ガイドから検証ツールへ直接アクセスできます。
一部の記事は日本語版を提供しています。未翻訳の記事は英語で表示されます。
注目のガイド
すべてのガイドと技術解説
Unified agent architectures: A2A and MCP in practice under the AAIF
Discover how the Linux Foundation AAIF unifies MCP and A2A into a dual-layer architecture, pairing local tool execution with cross-framework agent discovery.
A2A x402 extension: enabling pay-per-call monetisation for AI agents
Learn how A2A x402 brings HTTP 402 Payment Required to Agent Cards, enabling autonomous agents to declare pricing, meter usage, and settle calls in real time.
A2A vs MCP: two protocols solving two different problems
Compare A2A vs MCP: what each protocol connects, where they overlap, and why production AI agent systems often use both for tools and agent collaboration.
How to create an agent.json file for A2A v1.0
Learn how to create an agent.json file for A2A v1.0, including required Agent Card fields, the well-known URL, response headers, and common mistakes.
Publishing an Agent Card from ADK, LangGraph, CrewAI or Semantic Kernel
Learn how to publish an A2A Agent Card from Google ADK, LangGraph, CrewAI, or Semantic Kernel by mapping framework concepts to standard discovery fields.
Agent Card validation errors explained, one by one
Diagnose every A2A v1.0 Agent Card validation error and warning, understand what triggers it, and apply the exact fix in validator check order.
What A2A v1.0 changed in the Agent Card
Learn how A2A v1.0 changes Agent Cards, from supportedInterfaces and required skill tags to removed fields, with practical v0.x migration examples.