kubbi is a secure handoff layer for AI agents that creates temporary, encrypted claim links to pass sensitive payloads or multi-file bundles between agents or humans; a producer uploads files, sets TTL and retrieval limits, and the consumer claims the payload on their schedule with burn-after-read, metadata preview, and revoke controls to minimize exposure. kubbi integrates into AI workflows via MCP/A2A tool support, Python and TypeScript SDKs, and a REST API, and enforces AES-256 encryption with key rotation—making it ideal for one-time tokens, configs, secrets, and other transient data in automated agent pipelines.