agentscope-ai/agent-identity ? reverse-engineered prompt

Build me a Python project for agent identity, something that lets an AI agent log in with its own keypair and get a short lived token that other services can verify. I want a local reference identity provider for offline testing, plus one SDK for the agent side to register, request a token, cache it, and refresh it, and another SDK for the service side to verify the token against the provider public keys.

Please include a simple quickstart that shows the full flow from creating an agent identity, to minting a JWT, to checking it in a connected app. It should work cleanly with the local provider first, and be set up so it could also point at a live external provider later. Add clear docs and a runnable example, and make the whole thing feel like a real identity layer for agents rather than just a demo. If you need to, look up current docs online for any related Python libraries or best practices.