Agent Gateway for A2A Agents: A Bifrost Setup Guide

Описание и применение

Бифрост v2.3.0 внедрил шлюз для агент‑к‑агенту, централизуя аутентификацию, контроль доступа и логирование, что упрощает аудит и управление.

Задача

Managing access, authentication, and logging for agent-to-agent (A2A) traffic was fragmented across individual agents, leading to duplicated credential handling and scattered logs.

Результат

Centralized authentication and logging for A2A agents, eliminating per‑agent credential duplication and enabling comprehensive audit trails.

Рабочий процесс

• 1. Ensure Bifrost v2.3.0 or later is running locally or via Docker.
• 2. Verify a reachable A2A agent that serves its agent card URL.
• 3. Create a virtual key for the calling application in Bifrost Governance.
• 4. Set the External Client URL in Bifrost Agents → Agent Settings to expose gateway endpoints.
• 5. Register the agent by its agent card URL in the dashboard or via config.json, specifying name, virtual_key_ids, and runtime_auth.
• 6. Enable forward_accepted_credential to pass caller credentials to the agent.
• 7. Test the gateway by sending an A2A request to /agents/a2a/<name>/ and observe logs in Agent Logs.
• 8. Review session traces, messages, tasks, and artifacts in the Agent Logs UI.

Доказательства

An agent gateway places one controlled endpoint between applications and A2A agents, so access checks and logs live in one place instead of inside each agent.

Источник

Bifrost v2.3.0 added Agent Gateway: register an agent by its agent card URL and callers reach it at /agents/a2a/<name>/ over JSON-RPC, REST, or gRPC.

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Two headers, x-bf-session-id (A2A context ID) and x-bf-agent-correlation-id (A2A task ID), link every model and tool call back to the agent task that made it.

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Without a gateway, each agent implements its own authentication, each caller holds a separate credential per agent, and the only record of a task lives in that agent's logs.

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