Add A2A Client plugin v0.1.0

[flyryan]

Plugin Information

• Plugin Author: ryan_duff
• Plugin Title: A2A Client
• Repository URL: https://github.com/flyryan/dify-a2a-plugin

Submission Type

• New Plugin
• Update to Existing Plugin

Description

First implementation of the Agent-to-Agent (A2A) protocol for Dify, enabling cross-platform agent collaboration and task delegation. This plugin provides 5 tools for both synchronous and asynchronous communication with external A2A-compliant agents.

Why this plugin is needed:

• Implements open A2A Protocol v0.3.0 standard for agent-to-agent collaboration
• Complements Dify's existing MCP support (which focuses on tool/data access) by enabling agent delegation
• Allows Dify agents to delegate specialized tasks to domain-expert agents on any A2A-compatible platform
• Supports both sync (message/send) and async (message/stream + tasks/get) communication patterns
• Provides universal agent-to-agent connectivity using JSON-RPC 2.0 standard

Key features:

• 5 comprehensive tools: list agents, get capabilities, call agent (sync), submit task (async), get task status
• Multiple authentication methods: Bearer, API Key, Basic Auth, None
• Secure credential storage via Dify's secret-input
• Full bilingual support (English + Chinese)
• Comprehensive error handling and 60s+ timeout support

Compliance Checklist

• I have reviewed the Dify Marketplace Publication Guidelines
• I have accepted the Plugin Developer Agreement
• I confirm my plugin works properly on both Dify Community Edition and Cloud
• I have completed testing of my plugin

Documentation Standards

• My README contains setup instructions
• My README contains usage details
• My README contains required APIs and credentials information
• My README contains connection requirements
• My README contains a link to the source repository

Privacy Requirements

• Does your plugin collect personal data? YES
  • Data collected: Agent API credentials (API keys, tokens), agent base URLs, agent names, agent descriptions
  • Purpose: To authenticate with and route requests to remote A2A-compatible agents
  • Storage: Securely stored in Dify's encrypted credential system
  • Third-party sharing: User instructions/messages sent to explicitly configured external agent endpoints only
• I confirm that I have prepared and included a privacy policy in my plugin package based on the Plugin Privacy Protection Guidelines
  • Privacy policy URL: https://github.com/flyryan/dify-a2a-plugin/blob/main/PRIVACY.md

Additional Information

• Testing: Unit tests included with mocked dependencies
• Production readiness: Plugin has been tested in local Dify Community Edition deployment
• Support: GitHub Issues (https://github.com/flyryan/dify-a2a-plugin/issues) + Email (ry@nduff.com)
• License: Apache License 2.0

[flyryan]

Hi everyone. Any update on this? We've been using this plugin in production successfully for weeks. It would be great to be able to use it without disabling plugin signing. Let me know if there is anything I can do to help!