Unified Mode

cURL (Unified Mode)

Raw HTTP examples for the unified endpoint

The unified endpoint is POST /v1/chat/completions. It accepts an OpenAI-compatible request body and returns an OpenAI-compatible response, regardless of which provider handles the request.

Basic request

$curl -X POST https://api.trygateway.ai/v1/chat/completions \
>  -H "Authorization: Bearer sk-proxy-YOUR_KEY_HERE" \
>  -H "Content-Type: application/json" \
>  -d '{
>    "model": "openai/gpt-4o",
>    "messages": [
>      {"role": "user", "content": "Hello!"}
>    ]
>  }'

Calling Anthropic

$curl -X POST https://api.trygateway.ai/v1/chat/completions \
>  -H "Authorization: Bearer sk-proxy-YOUR_KEY_HERE" \
>  -H "Content-Type: application/json" \
>  -d '{
>    "model": "anthropic/claude-sonnet-4-6",
>    "messages": [
>      {"role": "system", "content": "You are a helpful assistant."},
>      {"role": "user", "content": "What is quantum computing?"}
>    ],
>    "max_tokens": 512
>  }'

Calling Gemini

$curl -X POST https://api.trygateway.ai/v1/chat/completions \
>  -H "Authorization: Bearer sk-proxy-YOUR_KEY_HERE" \
>  -H "Content-Type: application/json" \
>  -d '{
>    "model": "google/gemini-2.5-flash",
>    "messages": [
>      {"role": "user", "content": "Write a haiku about APIs."}
>    ]
>  }'

Streaming

Add "stream": true to get Server-Sent Events:

$curl -X POST https://api.trygateway.ai/v1/chat/completions \
>  -H "Authorization: Bearer sk-proxy-YOUR_KEY_HERE" \
>  -H "Content-Type: application/json" \
>  -N \
>  -d '{
>    "model": "anthropic/claude-sonnet-4-6",
>    "messages": [
>      {"role": "user", "content": "Write a short story."}
>    ],
>    "stream": true
>  }'

The response is a stream of data: lines in OpenAI’s SSE format:

data: {"id":"chatcmpl-...","object":"chat.completion.chunk","choices":[{"index":0,"delta":{"content":"Once"},"finish_reason":null}]}
data: {"id":"chatcmpl-...","object":"chat.completion.chunk","choices":[{"index":0,"delta":{"content":" upon"},"finish_reason":null}]}
...
data: [DONE]

Tool calling

$curl -X POST https://api.trygateway.ai/v1/chat/completions \
>  -H "Authorization: Bearer sk-proxy-YOUR_KEY_HERE" \
>  -H "Content-Type: application/json" \
>  -d '{
>    "model": "openai/gpt-4o",
>    "messages": [
>      {"role": "user", "content": "What is the weather in Tokyo?"}
>    ],
>    "tools": [
>      {
>        "type": "function",
>        "function": {
>          "name": "get_weather",
>          "description": "Get weather for a city",
>          "parameters": {
>            "type": "object",
>            "properties": {
>              "city": {"type": "string"}
>            },
>            "required": ["city"]
>          }
>        }
>      }
>    ],
>    "tool_choice": "auto"
>  }'

Response format

All responses follow the OpenAI chat completion format:

1{
2  "id": "chatcmpl-abc123",
3  "object": "chat.completion",
4  "model": "anthropic/claude-sonnet-4-6",
5  "choices": [
6    {
7      "index": 0,
8      "message": {
9        "role": "assistant",
10        "content": "Hello! How can I help you today?"
11      },
12      "finish_reason": "stop"
13    }
14  ],
15  "usage": {
16    "prompt_tokens": 12,
17    "completion_tokens": 9,
18    "total_tokens": 21
19  }
20}

For Anthropic and Gemini, the model field in the response includes the provider prefix (e.g., anthropic/claude-sonnet-4-6). For OpenAI, the response uses the provider’s own model identifier (e.g., gpt-4o).