> ## Documentation Index
> Fetch the complete documentation index at: https://docs.antryk.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Serverless Functions

> Run event-driven functions with serverless compute

# Serverless Functions

Deploy event-driven functions that run on-demand. Pay only for execution time with automatic scaling from zero to thousands of concurrent executions.

## What are Serverless Functions?

Serverless Functions are event-driven code that runs in response to HTTP requests, webhooks, or scheduled events. They automatically scale and you only pay for the time your code is executing.

## Key Features

* **Pay-per-execution**: Only pay for actual runtime
* **Auto-scaling**: Scale from zero to thousands of concurrent executions
* **Cold Start Optimization**: Optimized for fast cold starts
* **Built-in Timeout**: Configurable execution timeouts
* **Environment Variables**: Secure configuration management
* **Custom Domains**: Use your own domain with automatic SSL

## Use Cases

* HTTP APIs and endpoints
* Webhook handlers
* Event processing
* Image processing
* Data transformation
* Real-time notifications
* Serverless cron jobs

## Getting Started

1. **Create a Serverless Function** from your dashboard
2. **Write your function** code
3. **Configure triggers** (HTTP, webhook, scheduled)
4. **Set timeout and memory** limits
5. **Deploy** and get your function URL

## Supported Runtimes

* **Node.js**: JavaScript and TypeScript
* **Python**: Python 3.9+
* **Go**: Compiled Go binaries
* **Rust**: Rust binaries

## Configuration Example

```javascript theme={null}
// Node.js function
export default async function handler(req, res) {
  const { name } = req.query;
  
  return res.json({
    message: `Hello, ${name}!`,
    timestamp: new Date().toISOString()
  });
}
```

## Trigger Types

* **HTTP**: REST API endpoints
* **Webhooks**: Incoming webhook events
* **Scheduled**: Cron-based triggers
* **Database**: Database change events
* **Queue**: Message queue triggers

## Environment Variables

Secure configuration with environment variables:

* **Built-in**: Automatically injected variables
* **Secrets**: Encrypted sensitive data
* **Per-function**: Function-specific variables

## Cold Starts

Optimize cold start performance:

* **Keep-alive**: Keep functions warm
* **Bundle size**: Minimize dependencies
* **Runtime**: Choose appropriate runtime
* **Region**: Deploy close to your users

## Pricing

Serverless Functions are billed by:

* **Requests**: Number of invocations
* **Execution Time**: Runtime in milliseconds
* **Memory**: Memory allocated per function
* **Outbound Bandwidth**: Data transfer out

## Monitoring

Monitor your functions with:

* **Metrics**: Request count, duration, errors
* **Logs**: Real-time execution logs
* **Traces**: Distributed tracing
* **Alerts**: Configure failure notifications