Provider Proxy

ARouter’s provider proxy lets you forward requests directly to any supported provider’s native API, using your ARouter API key as authentication. You don’t need individual API keys for each provider.

Endpoint

POST /{provider}/{path}
GET  /{provider}/{path}

Where {provider} is the provider slug and {path} is the provider’s native API path.

When to Use the Provider Proxy

Use case	Recommended approach
Standard LLM chat completions	`/v1/chat/completions` with `provider/model` format
Provider-specific features (e.g., Anthropic Batches, Gemini cached content)	`/{provider}/{path}` proxy
Native streaming format	`/{provider}/{path}` proxy
Provider-specific parameters not in the ARouter schema	`/{provider}/{path}` proxy

Supported Providers

Provider	Slug	Base URL
OpenAI	`openai`	`https://api.openai.com`
Anthropic	`anthropic`	`https://api.anthropic.com`
Google Gemini	`google`	`https://generativelanguage.googleapis.com`
DeepSeek	`deepseek`	`https://api.deepseek.com`
xAI	`xai`	`https://api.x.ai`
Kimi (Moonshot)	`kimi`	`https://api.moonshot.cn`
MiniMax	`minimax`	`https://api.minimax.chat`
Mistral	`mistral`	`https://api.mistral.ai`
Groq	`groq`	`https://api.groq.com`
Cohere	`cohere`	`https://api.cohere.com`
NVIDIA	`nvidia`	`https://integrate.api.nvidia.com`
Dashscope (Alibaba)	`dashscope`	`https://dashscope.aliyuncs.com`

Examples

OpenAI — Chat Completions

curl https://api.arouter.ai/openai/v1/chat/completions \
  -H "Authorization: Bearer lr_live_xxxx" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-5.4",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Anthropic — Messages

curl https://api.arouter.ai/anthropic/v1/messages \
  -H "Authorization: Bearer lr_live_xxxx" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-sonnet-4.6",
    "max_tokens": 1024,
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Anthropic — Message Batches

# Create a batch
curl https://api.arouter.ai/anthropic/v1/messages/batches \
  -X POST \
  -H "Authorization: Bearer lr_live_xxxx" \
  -H "Content-Type: application/json" \
  -d '{
    "requests": [
      {
        "custom_id": "request-1",
        "params": {
          "model": "claude-sonnet-4.6",
          "max_tokens": 1024,
          "messages": [{"role": "user", "content": "Hello!"}]
        }
      }
    ]
  }'

# Check batch status
curl https://api.arouter.ai/anthropic/v1/messages/batches/msgbatch_xxx \
  -H "Authorization: Bearer lr_live_xxxx"

Google Gemini — Generate Content

curl "https://api.arouter.ai/google/v1beta/models/gemini-2.5-flash:generateContent" \
  -X POST \
  -H "Authorization: Bearer lr_live_xxxx" \
  -H "Content-Type: application/json" \
  -d '{
    "contents": [
      {"role": "user", "parts": [{"text": "Hello!"}]}
    ]
  }'

Google Gemini — List Models

curl "https://api.arouter.ai/google/v1beta/models" \
  -H "Authorization: Bearer lr_live_xxxx"

DeepSeek — Chat Completions

curl https://api.arouter.ai/deepseek/v1/chat/completions \
  -H "Authorization: Bearer lr_live_xxxx" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "deepseek-v3.2",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Notes

Authentication: ARouter injects the provider’s API key automatically. You only need your ARouter key.
Native format: Requests and responses are passed through as-is — ARouter does not transform them.
Usage tracking: Token usage is still recorded against your ARouter account.
Path passthrough: Everything after /{provider}/ is forwarded to the provider unchanged.

When using provider proxy for Anthropic, the anthropic-version header is injected automatically. You don’t need to include it.

Get Started

Core Concepts

Routing

Features

Guides

Privacy

Administration

Best Practices

Frameworks & Integrations

For Providers

Support

Endpoint

When to Use the Provider Proxy

Supported Providers

Examples

OpenAI — Chat Completions

Anthropic — Messages

Anthropic — Message Batches

Google Gemini — Generate Content

Google Gemini — List Models

DeepSeek — Chat Completions

Notes

​Endpoint

​When to Use the Provider Proxy

​Supported Providers

​Examples

​OpenAI — Chat Completions

​Anthropic — Messages

​Anthropic — Message Batches

​Google Gemini — Generate Content

​Google Gemini — List Models

​DeepSeek — Chat Completions

​Notes

Endpoint

When to Use the Provider Proxy

Supported Providers

Examples

OpenAI — Chat Completions

Anthropic — Messages

Anthropic — Message Batches

Google Gemini — Generate Content

Google Gemini — List Models

DeepSeek — Chat Completions

Notes