protocols

An API endpoint that accepts a conversation history (array of messages with roles) and returns the model's next response. This is the primary interface for conversational AI, supporting multi-turn dia...

Also: Chat API, Messages API, Conversational API

An API endpoint that converts text into vector embeddings—dense numerical representations suitable for similarity search, clustering, and classification. Embedding APIs take text strings and return ar...

Also: Embeddings Endpoint, Text Embedding API

A vocabulary for annotating and validating JSON documents, widely used in LLM applications to define tool parameters, structured output formats, and API request/response shapes. JSON Schema provides a...

Also: JSON Schema Specification, Schema Definition

The REST API specification originally created by OpenAI for accessing their language models, which has become the de facto standard for LLM APIs. Many providers (Anthropic, Google, local servers) offe...

Also: OpenAI Compatible API, OpenAI API Format