Since releasing the Responses API and Agents SDK⁠ in March, we’ve seen developers and enterprises build end-to-end agentic workflows for deep research, customer support, and more. Klarna built a support agent⁠ that handles two-thirds of all tickets and Clay 10x’ed growth⁠ with a sales agent. AgentKit builds on the Responses API to help developers build agents more efficiently and reliably.

As agent workflows grow more complex, developers need clearer visibility into how they work. Agent Builder⁠(opens in a new window) provides a visual canvas for composing logic with drag-and-drop nodes, connecting tools, and configuring custom guardrails. It supports preview runs, inline eval configuration, and full versioning—ideal for fast iteration.

At Ramp, the team went from a blank canvas to a buyer agent in just a few hours:

Similarly, LY Corporation—a leading Japanese technology and internet services company—built a work assistant agent with Agent Builder in less than two hours.