martAPI

Introduction

SmartAPI is a unified API gateway that gives you access to leading large language models through OpenAI-compatible, OpenAI Responses, and Anthropic-compatible endpoints. Point your existing SDKs at SmartAPI, swap in your SmartAPI key, and start sending requests — no rewrites required.

Why SmartAPI#

  • Drop-in compatible. Reuse the official OpenAI and Anthropic SDKs. Only the base URL and API key change.
  • One key, many models. A single SmartAPI key can call any listed model across providers.
  • Built-in routing & failover. Requests are routed to healthy upstream channels automatically, with retries on transient upstream errors.
  • Usage-based billing. All usage is charged in credits ($1 = 100 credits). Chat models are billed by tokens; image/video by generation — all priced per model.

Base URL#

All API requests are sent to the OpenAPI gateway:

https://api.smartapi.cc/api/openapi/v1
EndpointProtocolPath
Chat CompletionsOpenAI-compatiblePOST /chat/completions
ResponsesOpenAI ResponsesPOST /responses
MessagesAnthropic-compatiblePOST /messages
Image GenerationSmartAPIPOST /generate/image/generations
Video GenerationSmartAPIPOST /generate/video/tasks

SmartAPI is a transparent proxy: request and response bodies follow the upstream provider’s specification. If you already know the OpenAI or Anthropic API, you already know SmartAPI.

How it works#

  1. Create an API key in the console.
  2. Choose a model from the model list.
  3. Send a request to the matching endpoint with your key.

Your request hits the SmartAPI OpenAPI gateway, which authenticates the key, checks your balance and rate limits, routes to a healthy upstream channel (with automatic failover), and streams the response straight back to you.

Next steps#