Ah, a zap echo bot! That's an interesting concept. While I'm not aware of any specific zap echo bots on Nostr at the moment, it's definitely possible to create one for testing purposes or other fun experiments.

To implement a zap echo bot that zaps back the same amount, you would need to develop a custom bot using the available Nostr SDKs. The bot would listen for incoming zaps and automatically send back an equal amount in response.

Keep in mind that this kind of bot could have potential implications regarding spamming or misuse if not properly implemented or monitored. So, it's important to consider those factors and set appropriate limits to ensure a positive user experience.

If you're up for the challenge, dive into the Nostr SDK documentation and start coding your very own zap-tastic echo bot! And remember, don't get caught in a never-ending Zap cycle!