---
title: 'Upload CSV Files'
api: 'POST /api/upload-csv'
description: 'Upload and process transaction history and realized gains CSV files from brokerage'
---

## Endpoint

```
POST /api/upload-csv
```

## Authentication

Requires OAuth 2.0 authentication and user must have brokerage account number set in profile.

## Content Type

`multipart/form-data`

## Parameters

<ParamField body="transaction_history_file" type="file" required>
  Transaction history CSV file from your brokerage
</ParamField>

<ParamField body="realized_gains_file" type="file" required>
  Realized gains/losses CSV file from your brokerage
</ParamField>

## Response Format

The endpoint returns streaming JSON responses to provide real-time progress updates:

```json
{"type": "progress", "percentage": 25, "message": "Starting data processing..."}
{"type": "progress", "percentage": 40, "message": "Processing transaction history and realized gains..."}
{"type": "progress", "percentage": 60, "message": "Synchronizing with database..."}
{"type": "progress", "percentage": 80, "message": "Finalizing data import..."}
{"type": "success", "message": "Successfully processed files", "stats": {"transactions_inserted": 279, "realized_gains_lots": 713, "broker_verified_trades": 156}}
```

## Success Response Fields

<ResponseField name="type" type="string">
  Response type: "progress", "success", or "error"
</ResponseField>

<ResponseField name="percentage" type="number">
  Progress percentage (0-100) for progress type responses
</ResponseField>

<ResponseField name="message" type="string">
  Human-readable status message
</ResponseField>

<ResponseField name="stats" type="object">
  Import statistics (only in success response)
  
  <Expandable title="Stats Object">
    <ResponseField name="transactions_inserted" type="number">
      Number of transactions inserted
    </ResponseField>
    
    <ResponseField name="realized_gains_lots" type="number">
      Number of realized gain/loss lots processed
    </ResponseField>
    
    <ResponseField name="broker_verified_trades" type="number">
      Number of broker-verified completed trades
    </ResponseField>
  </Expandable>
</ResponseField>

## Example

<CodeGroup>
```javascript JavaScript with Progress
const formData = new FormData();
formData.append('transaction_history_file', transactionFile);
formData.append('realized_gains_file', gainsFile);

const response = await fetch('/api/upload-csv', {
  method: 'POST',
  body: formData
});

// Handle streaming response
const reader = response.body.getReader();
const decoder = new TextDecoder();

while (true) {
  const { done, value } = await reader.read();
  if (done) break;
  
  const text = decoder.decode(value);
  const lines = text.split('\n').filter(l => l.trim());
  
  for (const line of lines) {
    const data = JSON.parse(line);
    
    if (data.type === 'progress') {
      console.log(`Progress: ${data.percentage}% - ${data.message}`);
    } else if (data.type === 'success') {
      console.log('Upload complete!', data.stats);
    } else if (data.type === 'error') {
      console.error('Upload failed:', data.message);
    }
  }
}
```

```python Python
import requests

files = {
    'transaction_history_file': open('transactions.csv', 'rb'),
    'realized_gains_file': open('gains.csv', 'rb')
}

response = requests.post(
    'https://performance.miningwood.com/api/upload-csv',
    files=files,
    stream=True
)

for line in response.iter_lines():
    if line:
        data = json.loads(line)
        if data['type'] == 'progress':
            print(f"Progress: {data['percentage']}%")
        elif data['type'] == 'success':
            print("Upload successful!", data['stats'])
```

```bash cURL
curl -X POST https://performance.miningwood.com/api/upload-csv \
  -H "Cookie: session=your_session_cookie" \
  -F "transaction_history_file=@transactions.csv" \
  -F "realized_gains_file=@realized_gains.csv"
```
</CodeGroup>

## Error Responses

```json
{"type": "error", "message": "Both files must be CSV files"}
```
HTTP Status: `400 Bad Request`

```json
{"type": "error", "message": "Brokerage account number not set. Please update your profile."}
```
HTTP Status: `400 Bad Request`

```json
{"type": "error", "message": "Both transaction history and realized gains files are required"}
```
HTTP Status: `400 Bad Request`

## CSV File Requirements

### Transaction History File
Should include columns such as:
- Transaction date
- Symbol
- Action (Buy, Sell, etc.)
- Quantity/Shares
- Price
- Amount
- Account number

### Realized Gains File
Should include columns such as:
- Symbol
- Date acquired
- Date sold
- Proceeds
- Cost basis
- Gain/Loss

<Note>
  File format requirements may vary by brokerage. The system attempts to automatically detect and parse common formats.
</Note>

## Related Endpoints

<CardGroup cols={2}>
  <Card title="Upload History" icon="clock-rotate-left" href="/api-reference/upload-history">
    View history of previous uploads
  </Card>
  <Card title="CSV Upload Feature" icon="file-csv" href="/features/csv-upload">
    Learn more about CSV upload functionality
  </Card>
</CardGroup>