Choose an API - NagaAI Documentation

Chat and agents

The three chat endpoints reach the same models. Pick the one your SDK or tool already speaks.

If your code uses	Call	Guide
`client.chat.completions` from the OpenAI SDK, or a tool that asks for an “OpenAI-compatible” base URL	`POST /v1/chat/completions`	Chat Completions
`client.responses` from the OpenAI SDK, Codex CLI, OpenAI Agents SDK	`POST /v1/responses`	Responses
The Anthropic SDK, Claude Code	`POST /v1/messages`	Messages

For new code, choose by the features you need:

Chat Completions is the format most third-party tools expect. NagaAI adds the model’s reasoning text to it as reasoning_content.
Responses returns typed output items and streams named events. NagaAI keeps no state between Responses calls, so you send the whole conversation each time.
Messages uses Anthropic content blocks and requires max_tokens.

Other tasks

Task	Call	Guide
Generate or edit images	`POST /v1/images/generations`, `POST /v1/images/edits`	Images
Text to speech	`POST /v1/audio/speech`	Audio
Speech to text, translation to English	`POST /v1/audio/transcriptions`, `POST /v1/audio/translations`	Audio
Vectors for search and retrieval	`POST /v1/embeddings`	Embeddings
Classify text and images for safety	`POST /v1/moderations`	Moderations

Field-by-field contracts for every endpoint are in the API reference.