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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.

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Endpoint

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

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When to Use the Provider Proxy

Use caseRecommended 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

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Supported Providers

ProviderSlugBase URL
OpenAIopenaihttps://api.openai.com
Anthropicanthropichttps://api.anthropic.com
Google Geminigooglehttps://generativelanguage.googleapis.com
DeepSeekdeepseekhttps://api.deepseek.com
xAIxaihttps://api.x.ai
Kimi (Moonshot)kimihttps://api.moonshot.cn
MiniMaxminimaxhttps://api.minimax.chat
Mistralmistralhttps://api.mistral.ai
Groqgroqhttps://api.groq.com
Coherecoherehttps://api.cohere.com
NVIDIAnvidiahttps://integrate.api.nvidia.com
Dashscope (Alibaba)dashscopehttps://dashscope.aliyuncs.com

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Examples

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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!"}]
  }'

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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!"}]
  }'

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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"

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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!"}]}
    ]
  }'

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Google Gemini — List Models

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

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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!"}]
  }'

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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.