Text classification
Classify support tickets, feedback, emails, and any text content into custom categories with a single API call.
Classification API
Classify documents, text, and images with one API
OpenClassifier is a REST API for classifying content into your custom labels. Send PDFs, text, or images — get back predictions with confidence scores. Automate invoice sorting, contract analysis, and document workflows.
Classify any content type
One API for documents, text, and images. Define your labels, send your content, get predictions.
Image classification
Categorize photos, screenshots, scanned documents, and visual content. Batch multiple images in one request.
Document classification
Process entire PDFs automatically. Extract text from invoices, contracts, reports, and receipts — classify each page or the whole document.
Simple to integrate
A straightforward REST API for text, images, and PDFs. Send a POST request, get JSON back. Works with any language or framework.
- 1Define your labels for the classification task.
- 2Send your content via POST request.
- 3Get the predicted label and confidence score.
Text classification
Route support tickets to the right team automatically.
import requests
response = requests.post(
"https://api.openclassifier.ai/classify/text",
headers={"Authorization": "Bearer YOUR_API_KEY"},
json={
"content": "I want to return this damaged item",
"labels": ["shipping", "returns", "billing"]
}
)
print(response.json()["results"]["label"])
# Output: returnsDocument classification
Classify invoices, contracts, and reports automatically.
import requests
# Classify a PDF document
response = requests.post(
"https://api.openclassifier.ai/classify/pdf",
headers={"Authorization": "Bearer YOUR_API_KEY"},
json={
"input": {"url": "https://example.com/invoice.pdf"},
"labels": ["invoice", "contract", "receipt", "report"],
"mode": "document" # or "per_page"
}
)
result = response.json()
print(result["documentLabel"]["label"])
# Output: invoice
print(result["documentLabel"]["confidence"])
# Output: 0.94Multi-label classification
Get intent, sentiment, and urgency in one call.
const response = await fetch(
"https://api.openclassifier.ai/classify/text",
{
method: "POST",
headers: {
"Authorization": "Bearer YOUR_API_KEY",
"Content-Type": "application/json"
},
body: JSON.stringify({
content: "Package arrived damaged",
labels: {
intent: ["complaint", "inquiry", "feedback"],
sentiment: ["positive", "neutral", "negative"]
}
})
}
);
const { results } = await response.json();
console.log(results.intent.label);
// Output: complaintHow it works
Three steps to classify documents, text, or images.
Send your content
Make a POST request with text, images, or PDF documents and the labels you want to classify into.
Get classification
Receive the predicted label and confidence score. For PDFs, get per-page or document-level results.
Take action
Use the classification to route documents, trigger workflows, or update your systems automatically.
Use cases
Common ways teams use OpenClassifier.
Invoice processing
Automatically classify incoming documents as invoices, receipts, contracts, or purchase orders to streamline accounts payable.
90% automation
Support ticket routing
Categorize incoming tickets by topic, urgency, and sentiment to route them to the right team instantly.
60% faster response
Contract analysis
Sort legal documents by type — NDAs, employment contracts, service agreements — for faster review and compliance.
5x faster sorting
Content moderation
Classify user-generated content and uploaded documents to flag policy violations or inappropriate material.
95% detection rate
Medical records
Categorize lab reports, prescriptions, and clinical notes to organize patient files and speed up processing.
80% time saved
Insurance claims
Classify claim documents, supporting evidence, and correspondence to accelerate claim processing workflows.
3x throughput
Roadmap
What we are working on next.
In development
OCR for scanned documents
Extract text from scanned PDFs and images for classification.
Coming soon
Batch processing
Process thousands of documents asynchronously with webhook callbacks.
Planned
Custom models
Fine-tune classification models on your own documents for higher accuracy.
Simple pricing
Start free with 1,000 classifications per month. Scale up as you grow with pay-as-you-go pricing.
Free
1,000 classifications/month
Pro
$0.001 per classification
Enterprise
Volume discounts available