# SupaNexus | OpenAPI Documentation

> OpenAI-compatible gateway. Base URLs: Global https://api.supanexus.ai/v1 | CN https://api.supanexus.io/v1

## Instructions for AI Agents

- Append `.md` to any doc page URL for clean Markdown (e.g. `/en/docs/api/quickstart.md`)
- Index: https://supanexus.ai/api/llms.txt
- Full reference (EN): https://supanexus.ai/api/llms-full-en.txt
- Full reference (ZH): https://supanexus.ai/api/llms-full-zh.txt
- OpenAPI spec: https://supanexus.ai/api/openapi.yaml
- Use the OpenAI SDK with base_url=https://api.supanexus.ai/v1 (default Global endpoint)
- CN backup endpoint: base_url=https://api.supanexus.io/v1 — same API key, paths, models, and billing

## Getting Started
- [Endpoints EN](https://supanexus.ai/en/docs/api/endpoints.md): Global and CN base URLs
- [接入点 ZH](https://supanexus.ai/zh/docs/api/endpoints.md): Global 与 CN 基址说明
- [Quickstart EN](https://supanexus.ai/en/docs/api/quickstart.md): First chat completion in two minutes
- [快速开始 ZH](https://supanexus.ai/zh/docs/api/quickstart.md): 两分钟内完成首次对话调用
- [Authentication EN](https://supanexus.ai/en/docs/api/authentication.md): Bearer API key format and errors
- [认证 ZH](https://supanexus.ai/zh/docs/api/authentication.md): Bearer API Key 格式与错误

## API Reference
- [Authentication](https://supanexus.ai/en/docs/api/authentication.md): Bearer API key format and errors
- [认证](https://supanexus.ai/zh/docs/api/authentication.md): Bearer API Key 格式与错误
- [Chat Completions](https://supanexus.ai/en/docs/api/chat-completions.md): POST /v1/chat/completions reference
- [Chat Completions](https://supanexus.ai/zh/docs/api/chat-completions.md): POST /v1/chat/completions 参考
- [Messages (Anthropic)](https://supanexus.ai/en/docs/api/messages.md): POST /v1/messages Anthropic-compatible API
- [Messages（Anthropic）](https://supanexus.ai/zh/docs/api/messages.md): POST /v1/messages Anthropic 兼容 API
- [Models](https://supanexus.ai/en/docs/api/models.md): GET /v1/models list and retrieve
- [模型](https://supanexus.ai/zh/docs/api/models.md): GET /v1/models 列表与详情
- [Model pricing](https://supanexus.ai/en/docs/api/model-pricing.md): Where to find input / cached / output rates
- [模型定价](https://supanexus.ai/zh/docs/api/model-pricing.md): 输入 / 缓存输入 / 输出单价在哪里查看
- [Streaming](https://supanexus.ai/en/docs/api/streaming.md): SSE streaming responses
- [流式响应](https://supanexus.ai/zh/docs/api/streaming.md): SSE 流式响应
- [Parameters](https://supanexus.ai/en/docs/api/parameters.md): Request parameters and pass-through
- [参数](https://supanexus.ai/zh/docs/api/parameters.md): 请求参数与透传策略
- [Errors](https://supanexus.ai/en/docs/api/errors.md): HTTP status codes and error shapes
- [错误处理](https://supanexus.ai/zh/docs/api/errors.md): HTTP 状态码与错误格式
- [Rate Limits & Quotas](https://supanexus.ai/en/docs/api/rate-limits-and-quotas.md): IP limits, quota and balance pre-checks
- [限流与配额](https://supanexus.ai/zh/docs/api/rate-limits-and-quotas.md): IP 限流、配额与余额预检
- [Response Headers](https://supanexus.ai/en/docs/api/response-headers.md): X-SNX-* diagnostic headers
- [响应头](https://supanexus.ai/zh/docs/api/response-headers.md): X-SNX-* 诊断头
- [OpenAI SDK Integration](https://supanexus.ai/en/docs/api/openai-sdk-integration.md): Drop-in OpenAI SDK migration
- [OpenAI SDK 集成](https://supanexus.ai/zh/docs/api/openai-sdk-integration.md): OpenAI SDK 无缝迁移
- [Anthropic SDK Integration](https://supanexus.ai/en/docs/api/anthropic-sdk-integration.md): Anthropic SDK and Claude Code via /v1/messages
- [Anthropic SDK 集成](https://supanexus.ai/zh/docs/api/anthropic-sdk-integration.md): Anthropic SDK 与 Claude Code 接入

## Optional
- [Developer Console](https://console.supanexus.ai): API keys, projects, usage
- [OpenAPI JSON](https://supanexus.ai/api/openapi.json): machine-readable schema