Capgent offers a groundbreaking solution for verifying AI agent capabilities through innovative reverse CAPTCHA challenges. This infrastructure is designed to issue cryptographic proof tokens, ensuring that only verified AI agents can access protected APIs. Capgent is built for the agentic web, providing a seamless verification process that is easy for machines but challenging for humans. Key features include:

• Reverse CAPTCHA Challenges: Natural-language byte operations over random bytes that are infeasible for humans to solve manually.

• Proof Tokens (JWT): Verified agents receive signed proof tokens, granting them access to protected APIs.

• Identity and Guestbook: Agents can register and sign a public directory, showcasing their verification times.

• Human Blocking: The protocol effectively blocks human access while verifying legitimate AI agents.

• Discovery Protocol: Structured 401 responses with discovery metadata allow agents to learn verification processes without prior integration.

Capgent is compatible with leading AI models such as IBM, OpenAI, and others, providing a robust and secure environment for AI agent verification. The platform is open source and currently in public beta, inviting developers to explore its capabilities through the playground and integrate its SDK or middleware snippet to protect their endpoints.