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# Tạo message (Anthropic)

POST https://api.tramlabs.io/v1/messages
Content-Type: application/json

Tương thích với [Anthropic Messages API](https://docs.anthropic.com/en/api/messages). Dùng cho Claude Code, Claude Desktop.


Reference: https://docs.tramlabs.io/api/endpoints/rerank/messages/create-message

## Authentication

- `Authorization` header (bearer token, required) — API key làm bearer token. Tạo API key tại [Console](https://console.tramlabs.io/keys).

## Request

### Headers

- `anthropic-version` (string, optional, default: 2023-06-01) — Phiên bản Anthropic API

### Body (application/json)

This endpoint expects a MessageRequest.

- `model` (string, required) — Model ID
- `messages` (list of MessageRequestMessagesItems, required) — Danh sách messages
- `max_tokens` (integer, required) — Số token tối đa
- `system` (string, optional) — System prompt
- `stream` (boolean, optional, default: false) — Bật streaming (SSE)
- `temperature` (double, optional) — Sampling temperature
- `tools` (list of MessageRequestToolsItems, optional) — Danh sách tools

## Response

### 200

Thành công

- `id` (string, optional)
- `type` (string, optional)
- `role` (string, optional)
- `content` (list of MessageResponseContentItems, optional)
- `model` (string, optional)
- `stop_reason` (string, optional)
- `usage` (MessageResponseUsage, optional)

## Errors

### 400 Bad Request Error

Request không hợp lệ

- `error` (ErrorResponseError, optional)

### 401 Unauthorized Error

API key không hợp lệ hoặc thiếu

- `error` (ErrorResponseError, optional)

### 403 Forbidden Error

Vượt budget hoặc model không được phép

- `error` (ErrorResponseError, optional)

### 429 Too Many Requests Error

Rate limit exceeded

- `error` (ErrorResponseError, optional)

## Types

### MessageRequestMessagesItems

- `role` (enum, required)
  - Allowed values: `user`, `assistant`
- `content` (string, required)

### MessageRequestToolsItems

### MessageResponseContentItems

- `type` (string, optional)
- `text` (string, optional)

### MessageResponseUsage

- `input_tokens` (integer, optional)
- `output_tokens` (integer, optional)

### ErrorResponseError

- `message` (string, optional)
- `type` (string, optional)
- `code` (string, optional)

## Examples

**Request**

```json
{
  "model": "claude-sonnet-4.6",
  "messages": [
    {
      "role": "user",
      "content": "Hello, Claude!"
    }
  ],
  "max_tokens": 1024
}
```

**SDK Code**

```python
import requests

url = "https://api.tramlabs.io/v1/messages"

payload = {
    "model": "claude-sonnet-4.6",
    "messages": [
        {
            "role": "user",
            "content": "Hello, Claude!"
        }
    ],
    "max_tokens": 1024
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.json())
```

```javascript
const url = 'https://api.tramlabs.io/v1/messages';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: '{"model":"claude-sonnet-4.6","messages":[{"role":"user","content":"Hello, Claude!"}],"max_tokens":1024}'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.tramlabs.io/v1/messages"

	payload := strings.NewReader("{\n  \"model\": \"claude-sonnet-4.6\",\n  \"messages\": [\n    {\n      \"role\": \"user\",\n      \"content\": \"Hello, Claude!\"\n    }\n  ],\n  \"max_tokens\": 1024\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby
require 'uri'
require 'net/http'

url = URI("https://api.tramlabs.io/v1/messages")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"model\": \"claude-sonnet-4.6\",\n  \"messages\": [\n    {\n      \"role\": \"user\",\n      \"content\": \"Hello, Claude!\"\n    }\n  ],\n  \"max_tokens\": 1024\n}"

response = http.request(request)
puts response.read_body
```

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://api.tramlabs.io/v1/messages")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"model\": \"claude-sonnet-4.6\",\n  \"messages\": [\n    {\n      \"role\": \"user\",\n      \"content\": \"Hello, Claude!\"\n    }\n  ],\n  \"max_tokens\": 1024\n}")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.tramlabs.io/v1/messages', [
  'body' => '{
  "model": "claude-sonnet-4.6",
  "messages": [
    {
      "role": "user",
      "content": "Hello, Claude!"
    }
  ],
  "max_tokens": 1024
}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
  ],
]);

echo $response->getBody();
```

```csharp
using RestSharp;

var client = new RestClient("https://api.tramlabs.io/v1/messages");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"model\": \"claude-sonnet-4.6\",\n  \"messages\": [\n    {\n      \"role\": \"user\",\n      \"content\": \"Hello, Claude!\"\n    }\n  ],\n  \"max_tokens\": 1024\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = [
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
]
let parameters = [
  "model": "claude-sonnet-4.6",
  "messages": [
    [
      "role": "user",
      "content": "Hello, Claude!"
    ]
  ],
  "max_tokens": 1024
] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://api.tramlabs.io/v1/messages")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```