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POST
/
{provider}
/
{path}
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!"}]
  }'

import requests

resp = requests.post(
    "https://api.arouter.ai/anthropic/v1/messages",
    headers={
        "Authorization": "Bearer lr_live_xxxx",
        "Content-Type": "application/json",
    },
    json={
        "model": "claude-sonnet-4.6",
        "max_tokens": 1024,
        "messages": [{"role": "user", "content": "Hello!"}],
    },
)
print(resp.json())

const response = await fetch("https://api.arouter.ai/google/v1beta/models/gemini-2.5-flash:generateContent", {
  method: "POST",
  headers: {
    Authorization: "Bearer lr_live_xxxx",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    contents: [
      { role: "user", parts: [{ text: "Hello!" }] }
    ],
  }),
});

console.log(await response.json());
ARouter’s provider proxy forwards requests directly to a supported provider’s native API while handling provider authentication for you. 
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!"}]
  }'

import requests

resp = requests.post(
    "https://api.arouter.ai/anthropic/v1/messages",
    headers={
        "Authorization": "Bearer lr_live_xxxx",
        "Content-Type": "application/json",
    },
    json={
        "model": "claude-sonnet-4.6",
        "max_tokens": 1024,
        "messages": [{"role": "user", "content": "Hello!"}],
    },
)
print(resp.json())

const response = await fetch("https://api.arouter.ai/google/v1beta/models/gemini-2.5-flash:generateContent", {
  method: "POST",
  headers: {
    Authorization: "Bearer lr_live_xxxx",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    contents: [
      { role: "user", parts: [{ text: "Hello!" }] }
    ],
  }),
});

console.log(await response.json());

​
Path Parameters

ParameterDescription
providerProvider slug such as openai, anthropic, google, deepseek, or groq
pathNative API path to forward after the provider prefix

​
Notes

  • Requests and responses are passed through in the provider’s native format.
  • ARouter injects the provider credential automatically. You only send your ARouter API key.
  • Usage is still metered against your ARouter account.
  • Use this endpoint when you need provider-native features that are not represented in the normalized ARouter request schema.
For a broader guide with provider-specific examples, see Provider Proxy.