Preprocess Document for LLM Classification

# Step 1: Convert document to markdown
MARKDOWN=$(curl -s -X POST https://api.iterationlayer.com/document-to-markdown/v1/convert \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "file": {
      "type": "url",
      "name": "incoming-document.pdf",
      "url": "https://example.com/uploads/incoming-document.pdf"
    }
  }' | jq -r '.data.markdown')

# Step 2: Classify with an LLM
curl -s https://api.anthropic.com/v1/messages \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "Content-Type: application/json" \
  -d "{
    \"model\": \"claude-sonnet-4-20250514\",
    \"max_tokens\": 256,
    \"messages\": [{
      \"role\": \"user\",
      \"content\": \"Classify this document as one of: invoice, contract, receipt, report, other. Return only the category.\n\n$MARKDOWN\"
    }]
  }"

{
  "success": true,
  "data": {
    "name": "incoming-document.pdf",
    "mime_type": "application/pdf",
    "markdown": "# Invoice\n\n**Invoice Number:** INV-2026-047\n**Date:** 2026-03-20\n\n**From:**\nNordic Design Studio AB\nStorgatan 15\n11123 Stockholm, Sweden\n\n| Service | Hours | Rate | Amount |\n|---|---|---|---|\n| UX Research | 24 | €120.00 | €2,880.00 |\n| Interface Design | 40 | €140.00 | €5,600.00 |\n\n**Total:** €8,480.00"
  }
}

import { IterationLayer } from "iterationlayer";
import Anthropic from "@anthropic-ai/sdk";

const il = new IterationLayer({ apiKey: "YOUR_API_KEY" });
const anthropic = new Anthropic();

const { markdown } = await il.convertToMarkdown({
  file: {
    type: "url",
    name: "incoming-document.pdf",
    url: "https://example.com/uploads/incoming-document.pdf",
  },
});

const response = await anthropic.messages.create({
  model: "claude-sonnet-4-20250514",
  max_tokens: 256,
  messages: [
    {
      role: "user",
      content: `Classify this document as one of: invoice, contract, receipt, report, other. Return only the category.\n\n${markdown}`,
    },
  ],
});

{
  "success": true,
  "data": {
    "name": "incoming-document.pdf",
    "mime_type": "application/pdf",
    "markdown": "# Invoice\n\n**Invoice Number:** INV-2026-047\n**Date:** 2026-03-20\n\n**From:**\nNordic Design Studio AB\nStorgatan 15\n11123 Stockholm, Sweden\n\n| Service | Hours | Rate | Amount |\n|---|---|---|---|\n| UX Research | 24 | €120.00 | €2,880.00 |\n| Interface Design | 40 | €140.00 | €5,600.00 |\n\n**Total:** €8,480.00"
  }
}

import anthropic
from iterationlayer import IterationLayer

il = IterationLayer(api_key="YOUR_API_KEY")
claude = anthropic.Anthropic()

result = il.convert_to_markdown(
    file={
        "type": "url",
        "name": "incoming-document.pdf",
        "url": "https://example.com/uploads/incoming-document.pdf",
    }
)

response = claude.messages.create(
    model="claude-sonnet-4-20250514",
    max_tokens=256,
    messages=[
        {
            "role": "user",
            "content": f"Classify this document as one of: invoice, contract, receipt, report, other. Return only the category.\n\n{result['markdown']}",
        }
    ],
)

{
  "success": true,
  "data": {
    "name": "incoming-document.pdf",
    "mime_type": "application/pdf",
    "markdown": "# Invoice\n\n**Invoice Number:** INV-2026-047\n**Date:** 2026-03-20\n\n**From:**\nNordic Design Studio AB\nStorgatan 15\n11123 Stockholm, Sweden\n\n| Service | Hours | Rate | Amount |\n|---|---|---|---|\n| UX Research | 24 | €120.00 | €2,880.00 |\n| Interface Design | 40 | €140.00 | €5,600.00 |\n\n**Total:** €8,480.00"
  }
}

import (
    "context"
    "fmt"
    "os"

    il "github.com/iterationlayer/sdk-go"
    "github.com/anthropics/anthropic-sdk-go"
)

ilClient := il.NewClient("YOUR_API_KEY")
claude := anthropic.NewClient()

result, err := ilClient.ConvertToMarkdown(il.ConvertRequest{
    File: il.NewFileFromURL(
        "incoming-document.pdf",
        "https://example.com/uploads/incoming-document.pdf",
    ),
})

response, err := claude.Messages.New(context.Background(), anthropic.MessageNewParams{
    Model:     "claude-sonnet-4-20250514",
    MaxTokens: 256,
    Messages: []anthropic.MessageParam{
        anthropic.NewUserMessage(
            anthropic.NewTextBlock(
                fmt.Sprintf("Classify this document as one of: invoice, contract, receipt, report, other. Return only the category.\n\n%s", result.Markdown),
            ),
        ),
    },
})

{
  "success": true,
  "data": {
    "name": "incoming-document.pdf",
    "mime_type": "application/pdf",
    "markdown": "# Invoice\n\n**Invoice Number:** INV-2026-047\n**Date:** 2026-03-20\n\n**From:**\nNordic Design Studio AB\nStorgatan 15\n11123 Stockholm, Sweden\n\n| Service | Hours | Rate | Amount |\n|---|---|---|---|\n| UX Research | 24 | €120.00 | €2,880.00 |\n| Interface Design | 40 | €140.00 | €5,600.00 |\n\n**Total:** €8,480.00"
  }
}