Best File Storage for AI Agents

AWS S3 is highly agent-ready with excellent programmatic access, flexible authentication, and safety features, making it ideal for autonomous file storage and retrieval operations. The primary limitation is discoverability—agents cannot self-discover the API surface and must rely on pre-trained knowledge of S3 operations.

Backblaze B2 is well-suited for agent use with strong REST API access, flexible scoped authentication, and good SDK coverage across popular languages. However, missing OpenAPI specs and event-driven capabilities limit discoverability and real-time responsiveness compared to modern API-first services.

Uploadcare offers solid programmatic access through SDKs and API keys with good language coverage, making it suitable for agent-driven file handling workflows. However, the lack of OpenAPI specs, MCP support, and limited event reactivity prevent it from being a top-tier choice for complex agent orchestration.

UploadThing is a file upload service with available SDKs but lacks critical agent integration signals like OpenAPI specs, MCP servers, or CLI access. While likely functional for uploads through direct SDK use, its discoverability and programmatic surface area for autonomous agents are significantly constrained.

Wasabi has published llms.txt and offers SDKs/CLI, showing minimal AI-readiness intent, but lacks the fundamental infrastructure (API spec, documented endpoints, auth patterns) needed for reliable agent integration. The tool would require significant reverse-engineering or manual documentation work before agents could autonomously interact with it.