A bridging skill that implements the A2A Protocol RC v1.0 to enable seamless communication and task management between OpenClaw agents.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install firm-a2a-bridge
2. Manual Installation
Copy the skill folder to one of these locations
~/.openclaw/skills/ <project>/skills/ Priority: Workspace > Local > Bundled
3. Prompt Installation
Copy this prompt to OpenClaw to install it automatically.
Help me install firm-a2a-bridge using Clawhub. If Clawhub is not installed, install it first (npm i -g clawhub).
Prefer to download?
Get the raw skill files in a ZIP archive.
What is Firm A2A Bridge?
The Firm A2A Bridge is a foundational infrastructure component designed to implement the Agent-to-Agent (A2A) Protocol RC v1.0 within the OpenClaw ecosystem. This skill acts as a standardized communication layer, allowing autonomous agents to discover one another, exchange identity cards, and manage the full lifecycle of delegated tasks. By bridging the gap between isolated agents, it enables a cohesive multi-agent environment where resources and capabilities are shared through a structured MCP interface.
By integrating this bridge into your Openclaw Skills environment, developers can ensure their agents are compliant with modern interoperability standards. The skill specifically addresses critical functional gaps such as automated Agent Card generation, secure task transmission, and real-time status tracking via Server-Sent Events (SSE). It provides the necessary tools to transform independent scripts into a network of collaborating agents capable of handling complex, distributed workflows.
Firm A2A Bridge Use Cases
- Automating the discovery of remote and local agents using standardized Agent Cards.
- Orchestrating complex multi-agent workflows where tasks are delegated and tracked across different agent identities.
- Setting up real-time monitoring for long-running processes via SSE subscriptions.
- Configuring secure webhook-based push notifications for asynchronous task updates.
- Generating and validating .well-known/agent-card.json files to declare agent capabilities to the network.
How Firm A2A Bridge Works
- The bridge parses SOUL.md files to extract identity, skills, and security schemas to generate a standardized Agent Card.
- Agents use the discovery tool to probe endpoints or local directories for active Peer Agent Cards.
- Tasks are submitted via a standardized lifecycle, moving from submitted to working and finally to a terminal state (completed/failed).
- The bridge manages real-time communication through either polling, SSE subscriptions, or push notification webhooks.
- Security protocols validate all file paths and enforce SSRF protection to prevent unauthorized internal network access during agent communication.
Firm A2A Bridge Setup
To integrate this bridge into your Openclaw Skills directory, ensure you have the required dependencies installed and run the smoke tests:
pip install mcp-openclaw-extensions>=3.0.0
# Place the skill in your local registry
python -m pytest tests/test_smoke.py -k "TestA2aBridge" -v
Firm A2A Bridge Data Schema & Taxonomy
The skill organizes data around the A2A RC v1.0 specification:
| Component | Description |
|---|---|
| Agent Card | A JSON file (agent-card.json) containing metadata, skills, and security requirements. |
| Task Registry | Tracks task_id, context_id, and status (submitted, working, completed, failed). |
| Webhook Config | Stores webhook_url and masked auth_token for push notifications. |
| SSE Stream | Real-time event data for TaskStatusUpdateEvent and TaskArtifactUpdateEvent. |
Firm A2A Bridge Advanced Features
- Cryptographic signing of Agent Cards using JCS and JWS for verified identity provenance.
- Advanced SSRF protection that automatically blocks loopback and local IP ranges for all outbound task requests.
- Support for context-based task grouping, allowing multiple agents to collaborate on a single project ID within Openclaw Skills.
- Automated extraction of MIME types and input/output modes directly from SOUL.md frontmatter.
- Comprehensive task cancellation logic that prevents state conflicts in multi-agent environments.
SKILL.md
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