Stop Losing Money to OCR Errors
Every wrong digit costs you money. AWS Textract makes math errors on 8% of invoices. LedgerLens catches and corrects them automatically before they hit your database.
curl -X POST https://api.ledgerlens.dev/v1/scan \
-H "Authorization: Bearer ll_sk_..." \
-F "file=@invoice.pdf"{
"status": "success",
"meta": {
"audit_passed": true,
"reflexion_count": 0,
"processing_ms": 2319
},
"data": {
"vendor": "Acme Logistics",
"invoice_number": "INV-2025-001",
"line_items": [...],
"total": 4500.00
}
}How It Works
Five steps to verified data
From document upload to math-verified JSON in milliseconds. The Reflexion Loop is what makes us different.
Upload
Send your invoice, receipt, or financial document via API. Supports PDF, PNG, JPEG.
OCR Parse
AI extracts all text, tables, and line items with high accuracy.
Math Audit
The agent executes Python math checks: Does Qty × Price = Line Total?
Reflexion Loop
If math fails, it crops the problematic row, re-scans with high attention, and corrects.
Return JSON
Get structured, math-verified JSON with confidence scores and audit trail.
Try It Now
See it in action
Upload any invoice PDF and watch LedgerLens extract & verify the data in seconds. No signup required.
Drop your invoice here
or click to browse (PDF only)
// Upload an invoice to see the response
{
"status": "success",
"meta": {
"pages": 1,
"audit_passed": true,
"processing_ms": 2341
},
"data": {
"vendor": "...",
"line_items": [...]
}
}Ready to integrate? Get your API key in 30 seconds.
Get API KeyWhy LedgerLens
OCR that actually works for finance
Built by a team that got burned by Textract errors one too many times.
Self-Correcting AI
When the math doesn't add up, LedgerLens re-scans the row automatically. No more downstream errors from bad OCR.
Guaranteed Accuracy
99.9% math accuracy on line items. Every qty × price = total is verified before you get the response.
Zero Data Retention
Your documents are processed in memory and deleted immediately. Nothing stored, nothing logged, nothing shared.
Drop-in Integration
Python and Node SDKs, OpenAPI spec, webhook callbacks. Replace your current OCR in an afternoon.
Fast at Scale
Process 1 invoice or 100,000. Average response time under 3 seconds per page.
Clean JSON Output
Structured, validated data every time. Vendor, line items, totals, tax — ready for your database.
Why not just use Textract?
AWS Textract is fast but makes math errors on ~8% of invoices. For accounting, that's unacceptable. LedgerLens catches these errors before they cost you money.
Pricing
Competitive pricing, superior accuracy
Same price range as alternatives, but with math verification that actually works.
Try It
Test the API with 10 free document scans. No credit card required.
- 10 free test scans
- All document types
- Full API access
- Python & Node SDKs
- Math verification included
Pay Per Use
Simple usage-based pricing. Math verification included.
- Unlimited documents
- All document types
- Math verification (Reflexion Loop)
- Custom field extraction
- Webhook callbacks
- Usage dashboard
Enterprise
For high-volume operations. Volume discounts and dedicated support.
- Volume discounts
- Custom document schemas
- Dedicated processing
- 99.99% SLA
- Slack/Teams support
- On-premise option
How we compare
| Provider | Price/Page | Math Accuracy | Auto-Correction |
|---|---|---|---|
| AWS Textract | $0.065 | 92% | |
| Google Document AI | $0.03 | 94% | |
| Azure Doc Intel | $0.01 | 95% | |
| LedgerLens← You are here | $0.02 | 99.9% |
* Math accuracy = percentage of invoices where line item calculations are correct
Questions about billing? Read our FAQ or contact support.
Stop trusting broken OCR
Get your API key in 30 seconds. Start with 100 free pages. Your financial data will finally be accurate.