As the need for cryptographic signing of requests by bots and agents increases, website operators face challenges in discovering public keys for verification, particularly for lesser-known entities. This issue, known as discovery, is shared by platforms like Amazon Bedrock AgentCore, which aims to facilitate individual agent signatures rather than a monolithic approach. Cloudflare proposes a registry of bots and agents to simplify key discovery, akin to existing IP and robots.txt lists. This registry would allow operators to configure traffic permissions while fostering an open curation ecosystem. The Web Bot Auth protocol, proposed in May, has seen multiple implementations and aims to shift from brittle identification methods to more reliable cryptographic authentication. To support this, a registry format with a list of URLs for agent keys and a signature-agent card format providing metadata like operator contact and expected crawl rate are proposed. Cloudflare plans to provide one of the first registry instances, encouraging contributions and references from other operators.