Glossary

OpenAPI

OAS

Also called: OpenAPI Specification

A machine-readable specification for describing HTTP APIs, enabling AI systems and applications to discover and integrate callable API operations.

Explore more about Tool Integration

Related terms

API Execution

The process of invoking an external API to perform an action, retrieve data, or interact with a service as part of an AI agent's workflow.

API Client

A software library or component that simplifies communication with an API by handling requests, authentication, responses, and error handling.

Tool Invocation

The act of executing an external tool or function call with specified parameters as directed by an AI agent.

Function Calling

A capability that enables an AI model to identify when an external function or tool should be invoked, generate the required structured arguments, and incorporate the returned results into its workflow or response.

Signal, not noise.

Focused newsletter for builders and knowledge workers tracking how AI is changing real work. We surface what matters in practice, not every headline. Curated for practitioners, not spectators.

Subscribe to our newsletter