by a2aproject · Agent Tool · ★ 463
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A2A Protocol Inspector The A2A Inspector is a web-based tool designed to help developers inspect, debug, and validate servers that implement the A2A (Agent2Agent) protocol. It provides a user-friendly interface to interact with an A2A agent, view communication, and ensure specification compliance. The application is built with a FastAPI backend and a TypeScript frontend. Features Connect to a local A2A Agent: Specify the base URL of any agent server to connect (e.g., ). View Agent Card: Automatically fetches and displays the agent's card. Spec Compliance Checks: Performs basic validation on the agent card to ensure it adheres to the A2A specification. Live Chat: A chat interface to send and receive messages with the connected agent. Debug Console: A slide-out console shows the raw JSON-RPC 2.0 messages sent and received between the inspector and the agent server. Prerequisites Python 3.10+ uv Node.js and npm Project Structure This repository is organized into two main parts: : Contains the Python FastAPI server that handles WebSocket connections and communication with the A2A agent. : Contains the TypeScript and CSS source files for the web interface.
| Stars | 463 |
| Forks | 142 |
| Language | TypeScript |
| Category | Agent Tool |
| License | Apache-2.0 |
| Quality Score | 66.8938226411299/100 |
| Open Issues | 54 |
| Last Updated | 2026-08-08 |
| Created | 2025-06-10 |
| Platforms | node |
| Est. Tokens | ~15k |
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a2a-inspector is Validation Tools for A2A Agents. It is categorized as a Agent Tool with 463 GitHub stars.
a2a-inspector is primarily written in TypeScript.
You can find installation instructions and usage details in the a2a-inspector GitHub repository at github.com/a2aproject/a2a-inspector. The project has 463 stars and 142 forks, indicating an active community.
a2a-inspector is released under the Apache-2.0 license, making it free to use and modify according to the license terms.
The top alternatives to a2a-inspector on Agent Skills Hub include skills, awesome-android-agent-skills, claude-code-skill-factory. Each offers a different approach to the same problem space — compare them side-by-side by stars, quality score, and community activity.