HandoffProbe
HandoffProbe is an open-source security testing tool specifically designed for AI agent handoffs and cross-protocol AI agent systems. It focuses on testing the security of transitions between A2A (Agent-to-Agent) and MCP (Model Context Protocol) integrations. As AI agents become more interconnected and delegate tasks across protocol boundaries, the need to identify and mitigate vulnerabilities at these handoff points becomes critical. HandoffProbe aims to provide developers and security teams with a way to audit these interactions and ensure that data, credentials, and control are transferred safely. The tool is publicly available on GitHub, making it free to use, inspect, and modify. It is likely intended for integration into security testing pipelines or as a standalone auditing utility. Since it targets fairly new protocols (A2A and MCP), it occupies a niche but growing area of AI security. The project appears to be in its early stages, with limited documentation and community resources at present. Still, its purpose addresses a real concern for organizations building multi-agent systems and seeking to verify the integrity of their architecture. HandoffProbe's development is aligned with the broader open-source movement to secure AI ecosystems. While detailed installation, usage, and configuration instructions are not yet extensive, the project's existence highlights a proactive approach to the security challenges introduced by agent-to-agent communication. For those working with AI agents, MCP servers, and A2A protocols, HandoffProbe offers a starting point for testing handoff security before such vulnerabilities can be exploited.
- Category
- Open Source
- Pricing
- Free
Problem solved
HandoffProbe solves the problem of insufficient security testing for AI agent handoffs between heterogeneous protocols such as A2A and MCP. With agents increasingly delegating tasks and passing data across protocol boundaries, vulnerabilities can be introduced at these transition points. This tool gives security-minded developers a way to probe and verify the safety and integrity of agent interactions.
Use cases
- Security testing of A2A to MCP agent handoffs
- Auditing cross-protocol agent communication for vulnerabilities
- Identifying unsafe data or context passing during agent transitions
- Verifying authentication and authorization at handoff boundaries
- Simulating attacker-controlled handoff scenarios
Audience
- Developers
- Researchers
- Enterprise
Pros
- Free and open-source
- Focused on emerging AI agent security niche
- Supports A2A and MCP protocols
- Can be integrated into security testing workflows
- Community-driven development
Cons
- Limited documentation currently available
- May lack mature feature set
- Narrow scope (agent handoffs only)
- Unknown maintenance and release cadence
- Requires familiarity with A2A and MCP protocols
Official website: https://github.com/Heaviside479/handoffprobe
Canonical LambdaBase page: https://www.lambdabase.com/tools/handoffprobe