File Attachments

Example request

PythonTypeScript

import os
import base64
import anthropic

client = anthropic.Anthropic(
    api_key="<API_KEY>",,
    base_url='https://llm.siraya.pro'
)

# Read files as base64
with open('./document.pdf', 'rb') as f:
    pdf_base64 = base64.b64encode(f.read()).decode('utf-8')

with open('./image.png', 'rb') as f:
    image_base64 = base64.b64encode(f.read()).decode('utf-8')

message = client.messages.create(
    model='claude-sonnet-4-5@20250929',
    max_tokens=1024,
    messages=[
        {
            'role': 'user',
            'content': [
                {
                    'type': 'document',
                    'source': {
                        'type': 'base64',
                        'media_type': 'application/pdf',
                        'data': pdf_base64,
                    },
                },
                {
                    'type': 'image',
                    'source': {
                        'type': 'base64',
                        'media_type': 'image/png',
                        'data': image_base64,
                    },
                },
                {
                    'type': 'text',
                    'text': 'Please summarize the PDF and describe the image.',
                },
            ],
        }
    ],
)

print('Response:', message.content[0].text)

import Anthropic from '@anthropic-ai/sdk';
import fs from 'node:fs';

const anthropic = new Anthropic({
  "<API_KEY>",
  baseURL: 'https://llm.siraya.pro',
});

// Read files as base64
const pdfData = fs.readFileSync('./document.pdf');
const imageData = fs.readFileSync('./image.png');

const pdfBase64 = pdfData.toString('base64');
const imageBase64 = imageData.toString('base64');

const message = await anthropic.messages.create({
  model: 'anthropic/claude-sonnet-4.5',
  max_tokens: 1024,
  messages: [
    {
      role: 'user',
      content: [
        {
          type: 'document',
          source: {
            type: 'base64',
            media_type: 'application/pdf',
            data: pdfBase64,
          },
        },
        {
          type: 'image',
          source: {
            type: 'base64',
            media_type: 'image/png',
            data: imageBase64,
          },
        },
        {
          type: 'text',
          text: 'Please summarize the PDF and describe the image.',
        },
      ],
    },
  ],
});

console.log('Response:', message.content[0].text);

Supported file types

• Images: image/jpeg, image/png, image/gif, image/webp
• Documents: application/pdf