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

# Function

> Serverless functions—API subtype function; runtime, architecture, handler, and region in the panel.

## Summary

|                 |                                                                                                                                                                                                                                                                                                                                   |
| --------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Purpose**     | **Serverless functions** (Lambda, Cloud Functions, Azure Functions).                                                                                                                                                                                                                                                              |
| **Create menu** | “Create a serverless Lambda function” on AWS-flavored deployments.                                                                                                                                                                                                                                                                |
| **API subtype** | `function`.                                                                                                                                                                                                                                                                                                                       |
| **Panel**       | **`FunctionConfigurationPanel`** — **name**, **region**, **runtime** (language family), **architecture** (for example **x86\_64**), **handler** entrypoint (defaults like `index.handler`), optional **description**, plus **simple** vs **advanced** setup paths and **environment variables** (values may be masked in the UI). |

## Configuration (typical)

* **Runtime** — Language/runtime family appropriate to your cloud (Node, Python, etc., as offered by the project).
* **Architecture** — Aligns with **arm64** vs **x86\_64** offerings per provider.
* **Handler** — Function entry; Azure/GCP defaults in code mirror common patterns (`index.handler`).
* **Environment** — Key/value env vars for configuration and secrets (treat as sensitive).

## Canvas and connections

* Connect to **API gateways**, **queues**, **databases**, **storage**, or **applications** where your deployment’s **resource connections** allow it.

## Operations

* **Deploy / update** pushes code and configuration through the platform’s function APIs.
* **Delete** removes the function and related triggers when configured.

**API:** [API documentation](/api/index) → **Functions**, **Resources**.

[← Resource types hub](/gateways/resources)