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---
title: Contacts
description: Store and manage your audience
icon: Users
---
## Structure
```json
{
"id": "contact_abc123",
"email": "user@example.com",
"subscribed": true,
"data": {
"firstName": "Sarah",
"plan": "pro",
"mrr": 99
}
}
```
## Adding contacts
- **Dashboard:** Contacts → Add Contact
- **CSV import:** Contacts → Import
- **API:** `POST /contacts`
- **Events:** Auto-created when tracking events
## Contact data
The `data` field stores custom key-value pairs.
**Best practices:**
- Use consistent naming (camelCase or snake_case)
- Store dates as ISO strings: `"2024-03-15T10:30:00Z"`
- Use numbers for numeric values (enables comparisons)
## Template variables
Use `{{fieldName}}` in emails:
```html
<p>Hello {{firstName}}!</p>
```
**Fallback:** `{{firstName ?? 'there'}}`
**Reserved:** `{{email}}`, `{{id}}`
## Temporary data
Data that won't save to contact:
```javascript
data: {
resetCode: { value: 'ABC123', persistent: false }
}
```
Use for: one-time codes, tokens, session data.