API Reference

nexusflow access is organized into three compatible protocols plus one async task API. OpenAI Chat, Anthropic Messages, and Responses API requests all flow through the same model routing, billing, and monitoring pipeline.

Three-Protocol Compatibility

OpenAI Chat, Anthropic Messages, and Responses API share one set of keys, billing, and monitoring.

Streaming Responses

Chat endpoints support SSE streaming, ideal for real-time interaction and low-latency experiences.

Async Tasks

Image and video use a unified task API, ideal for high-latency and high-concurrency scenarios.

Pre-Launch Validation

Combined with rate limits, error codes, and the monitoring page to help you spot traffic risks before production.

Compatible Protocols

OpenAI Chat

/v1/chat/completions

Anthropic Messages

/v1/messages

Reuse the Anthropic SDK and Messages format.

Responses API

/v1/responses

Built-in web search and code interpreter, simplifying multi-turn context management.

Public Gateway Protocol Scope

AvailableOpenAI Chat / Anthropic Messages / Responses APIText, reasoning, vision, coding, and specialized models are called per supported_protocols.

AvailableOpenAI Embeddings / Image Generations / NexusFlow TasksEmbedding, image, and video models use the corresponding endpoints by capability.

This page lists only the public APIs you can currently call directly at https://nexusflow.hk.

Basics

Base URL

https://nexusflow.hk

Authentication

Authorization: Bearer sk-air-xxx

Request Format

Content-Type: application/json

Response Format

JSON / Server-Sent Events / Task Status

Recommended Integration

Chat

Use `/v1/chat/completions` by default, compatible with the OpenAI SDK.

Protocol

If you already have an Anthropic client or need the Responses API format, use the corresponding compatible endpoint.

Tasks

Image and video models prefer `/v1/tasks` and `/v1/tasks/:id`; images also support OpenAI-style `/v1/images/generations`.

API Endpoints

POST/v1/chat/completionsChat Completions endpoint with multi-turn conversations, streaming, and function calling

POST/v1/messagesAnthropic Messages compatible endpoint, ideal for reusing the Anthropic SDK

POST/v1/responsesResponses API with built-in tools (web search, code interpreter, etc.) and multi-turn context management

GET/v1/modelsRetrieve the list of available models and their information

POST/v1/embeddingsEmbedding endpoint that converts text into vector representations

POST/v1/tasksAsync task endpoint (unified submission for image / video)

GET/v1/tasks/:idQuery async task status