Query API

What is the Query API?

The Grain Query API allows you to programmatically access your analytics data using simple HTTP requests. While the Grain Dashboard provides a powerful visual interface for exploring your data, the Query API enables you to:

Build custom analytics dashboards tailored to your specific needs
Export data for external analysis or reporting
Integrate analytics into your own applications and workflows
Automate data processing with scheduled scripts and pipelines

Plan Requirement: The Query API requires a Builder plan or higher. Free plan users can upgrade at grainql.com/settings/billing.

Quick Start

Get up and running with the Query API in 3 steps:

Create an API Key

Navigate to your Dashboard Settings and create a secret with Query API permissions:

Go to Dashboard → Settings → Authentication
Click Generate New Secret
Enter a name like “Query API Key”
Check the “Query API” permission
Copy the generated secret (you won’t see it again!)

Authentication Strategy: The Query API authentication is independent of your SDK authentication strategy. You can use Query API keys regardless of whether your SDK is set to NONE, SERVER_SIDE, or JWT authentication.

Store your API key securely in environment variables. Never commit it to version control.

Make Your First Request

Query your events with a simple HTTP request:

curl -X POST https://queryapis.grainql.com/v1/api/query/your-tenant-id \
  -H "Content-Type: application/json" \
  -H "X-API-Key: YOUR_SECRET_KEY" \
  -d '{
    "event": "page_viewed",
    "after": "2024-01-01",
    "before": "2024-01-31",
    "pagination": { "offset": 0, "size": 10 }
  }'

This returns the last 10 page view events from January 2024.

Explore Your Data

Use the Query API to build custom analytics:

// Get all events for a specific user
const userEvents = await fetch('https://queryapis.grainql.com/v1/api/query/your-tenant-id', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'X-API-Key': process.env.GRAIN_API_KEY
  },
  body: JSON.stringify({
    filterSet: [
      { property: 'userId', comparison: 'EQUALS', value: 'user_123' }
    ],
    pagination: { offset: 0, size: 100 }
  })
});

const events = await userEvents.json();
console.log(`Found ${events.length} events for user`);

When to Use the Query API

✅ Perfect for:

Custom Dashboards: Build analytics views that match your specific workflow
Data Exports: Extract data for external analysis, reporting, or compliance
Integrations: Connect Grain data to other tools (Slack, email, BI platforms)
Automation: Scheduled reports, alerts, and data processing pipelines
Advanced Analysis: Complex queries that go beyond the dashboard interface

❌ Consider the Dashboard instead for:

Exploratory Analysis: The dashboard’s visual interface is great for discovering insights
One-off Queries: Quick questions that don’t need automation
Real-time Monitoring: The dashboard provides live event streams

Understanding Your Data

Before using the Query API, it helps to understand how your analytics data is structured:

Event Structure

Every event in Grain has this structure:

{
  "eventName": "button_clicked",
  "userId": "user_123",
  "eventTs": "2024-01-15T10:30:00Z",
  "properties": {
    "button_name": "signup",
    "page": "/home",
    "referrer": "https://google.com"
  },
  "eventDate": "2024-01-15",
  "insertId": "unique-event-id"
}

Key Fields

eventName: The type of event (e.g., “page_viewed”, “purchase_completed”)
userId: The user who performed the action (set via grain.identify() or grain.setUserId())
eventTs: When the event occurred (ISO 8601 timestamp)
properties: Custom data you included when tracking the event
eventDate: Date portion for efficient querying
insertId: Unique identifier for the event

Property Paths

When filtering events, you can query:

Event properties: properties.price, properties.category
Event metadata: eventName, eventTs, userId
Date fields: Use after and before parameters for date ranges

Common Use Cases

1. Custom Analytics Dashboard

Build a dashboard that shows exactly what you need:

// Get conversion funnel data
const funnelData = await Promise.all([
  // Step 1: Page views
  queryEvents({
    event: 'page_viewed',
    filterSet: [{ property: 'properties.page', comparison: 'EQUALS', value: '/signup' }]
  }),
  
  // Step 2: Form submissions
  queryEvents({
    event: 'form_submitted',
    filterSet: [{ property: 'properties.form_type', comparison: 'EQUALS', value: 'signup' }]
  }),
  
  // Step 3: Account creations
  queryEvents({
    event: 'account_created'
  })
]);

// Calculate conversion rates
const pageViews = funnelData[0].length;
const formSubmissions = funnelData[1].length;
const accounts = funnelData[2].length;

console.log(`Conversion rate: ${(accounts / pageViews * 100).toFixed(1)}%`);

2. Data Export for Analysis

Export data for external analysis:

import requests
import csv
from datetime import datetime, timedelta

def export_recent_events(tenant_id, api_key, days=30):
    """Export events from the last N days to CSV"""
    
    end_date = datetime.now()
    start_date = end_date - timedelta(days=days)
    
    all_events = []
    offset = 0
    page_size = 1000
    
    while True:
        response = requests.post(
            f'https://queryapis.grainql.com/v1/api/query/{tenant_id}',
            headers={
                'Content-Type': 'application/json',
                'X-API-Key': api_key
            },
            json={
                'after': start_date.strftime('%Y-%m-%d'),
                'before': end_date.strftime('%Y-%m-%d'),
                'pagination': {'offset': offset, 'size': page_size}
            }
        )
        
        events = response.json()
        if not events:
            break
            
        all_events.extend(events)
        offset += page_size
        
        if len(events) < page_size:
            break
    
    # Write to CSV
    with open('analytics_export.csv', 'w', newline='') as csvfile:
        if all_events:
            writer = csv.DictWriter(csvfile, fieldnames=all_events[0].keys())
            writer.writeheader()
            writer.writerows(all_events)
    
    return len(all_events)

# Export last 30 days
event_count = export_recent_events('your-tenant-id', 'your-api-key')
print(f'Exported {event_count} events to analytics_export.csv')

3. User Behavior Analysis

Analyze user journeys and behavior patterns:

// Get all events for a specific user to understand their journey
async function analyzeUserJourney(tenantId: string, apiKey: string, userId: string) {
  const response = await fetch(`https://queryapis.grainql.com/v1/api/query/${tenantId}`, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'X-API-Key': apiKey
    },
    body: JSON.stringify({
      filterSet: [
        { property: 'userId', comparison: 'EQUALS', value: userId }
      ],
      pagination: { offset: 0, size: 1000 }
    })
  });

  const events = await response.json();
  
  // Sort by timestamp
  events.sort((a, b) => new Date(a.eventTs).getTime() - new Date(b.eventTs).getTime());
  
  // Analyze the journey
  const journey = events.map(event => ({
    timestamp: event.eventTs,
    event: event.eventName,
    page: event.properties?.page,
    action: event.properties?.action
  }));
  
  console.log(`User ${userId} journey:`, journey);
  return journey;
}

4. Real-time Monitoring

Set up monitoring and alerts:

import time
import requests
from datetime import datetime

def monitor_error_rates(tenant_id, api_key, threshold=0.05):
    """Monitor error rates and alert if they exceed threshold"""
    
    # Count total events in last hour
    total_response = requests.post(
        f'https://queryapis.grainql.com/v1/api/query/count/{tenant_id}',
        headers={'X-API-Key': api_key},
        json={
            'after': (datetime.now() - timedelta(hours=1)).strftime('%Y-%m-%d'),
            'before': datetime.now().strftime('%Y-%m-%d')
        }
    )
    total_events = total_response.json()['count']
    
    # Count error events
    error_response = requests.post(
        f'https://queryapis.grainql.com/v1/api/query/count/{tenant_id}',
        headers={'X-API-Key': api_key},
        json={
            'event': 'error_occurred',
            'after': (datetime.now() - timedelta(hours=1)).strftime('%Y-%m-%d'),
            'before': datetime.now().strftime('%Y-%m-%d')
        }
    )
    error_events = error_response.json()['count']
    
    error_rate = error_events / total_events if total_events > 0 else 0
    
    if error_rate > threshold:
        print(f"🚨 High error rate detected: {error_rate:.2%}")
        # Send alert (Slack, email, etc.)
    else:
        print(f"✅ Error rate normal: {error_rate:.2%}")

# Run every 5 minutes
while True:
    monitor_error_rates('your-tenant-id', 'your-api-key')
    time.sleep(300)  # 5 minutes

Integration with Dashboard Features

The Query API works seamlessly with your existing Grain dashboard:

Matrices Integration

Use the Query API to build custom matrices that complement the Matrices page:

// Build a custom conversion matrix
async function buildConversionMatrix(tenantId: string, apiKey: string) {
  const events = ['page_viewed', 'form_started', 'form_submitted', 'purchase_completed'];
  const pages = ['/home', '/product', '/checkout', '/thank-you'];
  
  const matrix = {};
  
  for (const event of events) {
    matrix[event] = {};
    for (const page of pages) {
      const response = await fetch(`https://queryapis.grainql.com/v1/api/query/count/${tenantId}`, {
        method: 'POST',
        headers: { 'X-API-Key': apiKey },
        body: JSON.stringify({
          event,
          filterSet: [{ property: 'properties.page', comparison: 'EQUALS', value: page }]
        })
      });
      matrix[event][page] = (await response.json()).count;
    }
  }
  
  return matrix;
}

Tracks Integration

Query data that powers your Tracks funnels:

// Get funnel data for a specific track
async function getFunnelData(tenantId: string, apiKey: string, trackEvents: string[]) {
  const funnelData = [];
  
  for (const event of trackEvents) {
    const response = await fetch(`https://queryapis.grainql.com/v1/api/query/count/${tenantId}`, {
      method: 'POST',
      headers: { 'X-API-Key': apiKey },
      body: JSON.stringify({ event })
    });
    
    funnelData.push({
      event,
      count: (await response.json()).count
    });
  }
  
  return funnelData;
}

Rate Limits and Performance

Plan Limits

Plan	Requests per Minute	Requests per Day
Free	Not available	Not available
Builder	2	20
Growth	10	200
Scale	100	2,000

Rate Limit Planning: These limits are designed for typical analytics use cases. For high-frequency applications, real-time dashboards, or bulk data exports, consider our custom plans with higher limits.

Best Practices

1. Use the Count Endpoint for Aggregations

// ✅ Good: Use count for totals
const totalUsers = await fetch('/v1/api/query/count/tenant', {
  method: 'POST',
  body: JSON.stringify({ event: 'user_signed_up' })
});

// ❌ Avoid: Fetching all events just to count them
const allEvents = await fetch('/v1/api/query/tenant', {
  method: 'POST',
  body: JSON.stringify({ event: 'user_signed_up', pagination: { size: 10000 } }
});

2. Implement Pagination for Large Datasets

async function fetchAllEvents(tenantId: string, apiKey: string) {
  const allEvents = [];
  let offset = 0;
  const pageSize = 1000;
  
  while (true) {
    const response = await fetch(`/v1/api/query/${tenantId}`, {
      method: 'POST',
      headers: { 'X-API-Key': apiKey },
      body: JSON.stringify({
        pagination: { offset, size: pageSize }
      })
    });
    
    const events = await response.json();
    allEvents.push(...events);
    
    if (events.length < pageSize) break;
    offset += pageSize;
  }
  
  return allEvents;
}

3. Handle Rate Limits Gracefully

async function queryWithRetry(url: string, options: RequestInit, maxRetries = 3) {
  for (let attempt = 1; attempt <= maxRetries; attempt++) {
    try {
      const response = await fetch(url, options);
      
      if (response.status === 429) {
        const retryAfter = response.headers.get('Retry-After');
        const delay = retryAfter ? parseInt(retryAfter) * 1000 : Math.pow(2, attempt) * 1000;
        
        console.log(`Rate limited. Retrying in ${delay}ms...`);
        await new Promise(resolve => setTimeout(resolve, delay));
        continue;
      }
      
      return response;
    } catch (error) {
      if (attempt === maxRetries) throw error;
      await new Promise(resolve => setTimeout(resolve, Math.pow(2, attempt) * 1000));
    }
  }
}

Rate Limit Considerations: With the current rate limits (2-100 requests per minute), consider implementing request queuing or batching for high-frequency applications. For production applications with higher throughput needs, contact us about custom plans.

Security Best Practices

1. Never Expose API Keys in Client Code

❌ Don’t do this:

// NEVER put API keys in frontend code!
const apiKey = 'your-secret-key';
fetch('/v1/api/query/tenant', { headers: { 'X-API-Key': apiKey } });

✅ Do this instead:

// Backend API route
app.post('/api/query', async (req, res) => {
  const response = await fetch(`https://queryapis.grainql.com/v1/api/query/${req.body.tenantId}`, {
    headers: { 'X-API-Key': process.env.GRAIN_API_KEY },
    body: JSON.stringify(req.body.query)
  });
  res.json(await response.json());
});

// Frontend
fetch('/api/query', {
  method: 'POST',
  body: JSON.stringify({ tenantId: 'your-tenant', query: { event: 'page_viewed' } })
});

2. Use Environment Variables

# .env file (add to .gitignore!)
GRAIN_API_KEY=your-secret-key
GRAIN_TENANT_ID=your-tenant-id

3. Rotate Keys Regularly

Generate a new API key in the dashboard
Update your application with the new key
Deploy the changes
Revoke the old key after confirming the new one works

Next Steps

Now that you understand the basics, explore the detailed API reference:

API Reference

Complete endpoint documentation

Filter Reference

All filter operators and examples

Custom Dashboard

Build a custom analytics dashboard

Data Export

Export data for analysis

Custom Plans

Need higher rate limits or have specific usage requirements? We offer custom plans tailored to your needs:

Higher rate limits: Custom requests per minute/day limits
Dedicated support: Priority support and SLA guarantees
Custom features: Tailored analytics features and integrations
Volume discounts: Competitive pricing for high-volume usage

Support

Upgrade your plan: grainql.com/settings/billing
Dashboard: grainql.com/dashboard
Documentation: docs.grainql.com
Support: support@grainql.com

Getting Started

Integrations

Tracking & Events

Dashboard

Guides

React SDK

Advanced

What is the Query API?

Quick Start

When to Use the Query API

✅ Perfect for:

❌ Consider the Dashboard instead for:

Understanding Your Data

Event Structure

Key Fields

Property Paths

Common Use Cases

1. Custom Analytics Dashboard

2. Data Export for Analysis

3. User Behavior Analysis

4. Real-time Monitoring

Integration with Dashboard Features

Matrices Integration

Tracks Integration

Rate Limits and Performance

Plan Limits

Best Practices

Security Best Practices

1. Never Expose API Keys in Client Code

2. Use Environment Variables

3. Rotate Keys Regularly

Next Steps

API Reference

Filter Reference

Custom Dashboard

Data Export

Custom Plans

Support

Getting Started

Integrations

Tracking & Events

Dashboard

Guides

React SDK

Advanced

​What is the Query API?

​Quick Start

​When to Use the Query API

​✅ Perfect for:

​❌ Consider the Dashboard instead for:

​Understanding Your Data

​Event Structure

​Key Fields

​Property Paths

​Common Use Cases

​1. Custom Analytics Dashboard

​2. Data Export for Analysis

​3. User Behavior Analysis

​4. Real-time Monitoring

​Integration with Dashboard Features

​Matrices Integration

​Tracks Integration

​Rate Limits and Performance

​Plan Limits

​Best Practices

​Security Best Practices

​1. Never Expose API Keys in Client Code

​2. Use Environment Variables

​3. Rotate Keys Regularly

​Next Steps

API Reference

Filter Reference

Custom Dashboard

Data Export

​Custom Plans

​Support

What is the Query API?

Quick Start

When to Use the Query API

✅ Perfect for:

❌ Consider the Dashboard instead for:

Understanding Your Data

Event Structure

Key Fields

Property Paths

Common Use Cases

1. Custom Analytics Dashboard

2. Data Export for Analysis

3. User Behavior Analysis

4. Real-time Monitoring

Integration with Dashboard Features

Matrices Integration

Tracks Integration

Rate Limits and Performance

Plan Limits

Best Practices

Security Best Practices

1. Never Expose API Keys in Client Code

2. Use Environment Variables

3. Rotate Keys Regularly

Next Steps

Custom Plans

Support