Best AI Agent Authentication Platforms to Consider in 2026

AI agents are increasingly central to automating business processes, but their effectiveness relies heavily on robust authentication systems to interact securely with various external software platforms. AI agent authentication allows users to grant agents secure access to their data across software like calendars and CRMs, typically involving OAuth flows, API keys, or other authentication methods. Key platforms for this purpose include Nango, Arcade, and Auth0 for AI Agents, each offering distinct features. Nango boasts extensive API coverage and open-source flexibility, Arcade provides AI agent tool calling with automatic permission checks, and Auth0 offers secure token storage and integration with AI frameworks, though it currently supports limited APIs. The choice of an authentication platform is crucial for scalability, security, and meeting customer integration needs, with each option catering to different requirements in terms of API support and extensibility.