Functions overview

Serverless functions open a world of possibilities for running on-demand, server-side code without having to run a dedicated server. However, managing service discovery, configuring API gateways, and coordinating deployments between your app and your functions can quickly become overwhelming.

With Netlify Functions, your serverless functions are version-controlled, built, and deployed along with the rest of your Netlify site, and we will automatically handle service discovery through our built-in API gateway. This eliminates overhead and brings the power of Deploy Previews and rollbacks to your functions.

For longer-running function tasks, Background Functions allow for extended execution time using asynchronous invocation.

Currently, you can deploy functions built with TypeScript, JavaScript, and Go.

# Manage your functions

Functions deployed from Netlify are immutable. This means that an update to a function on your production branch won’t change the version that was deployed in a branch deploy, or in a Deploy Preview. You can access all versions of your functions in the Netlify web interface, under the Functions tab.

By default, the list displays all of the functions, including background functions, in the current production deploy. To find functions on another deploy, you can use the search field at the top of the list. You can start typing to jump to a particular branch, or find a Deploy Preview by number.

# Default deployment options

By default, all functions are deployed with:

  • us-east-1 AWS Lambda region
  • 1024 MB of memory
  • 10 second execution limit for synchronous functions, including scheduled functions
  • 15 minute execution limit for background functions
  • 6 MB request and response payload size limit for synchronous functions
  • 256 KB request and response payload size limit for background functions

# Custom deployment options

If you want to deploy your functions on different AWS regions, tweak memory or execution time limits, or deploy functions onto your own AWS account (in order to integrate with other AWS services on your account), please contact sales.

For example, the maximum execution limit supported for synchronous functions on certain plans is 26 seconds.

# More Functions resources

# Community resources

To get inspired, you can explore real-world serverless function code examples and tutorials created by the community.

Visit our Forums to join the conversation about Functions.

Optional configuration for functions: Directory

Optional configuration for functions: Directory

Optional configuration for functions: Node.js version for runtime

Build functions: JavaScript

Build functions: JavaScript

Build functions: JavaScript synchronous function format

Build functions: Test locally

Build functions: Test locally

Build functions: Test locally

Build functions: Go

Build functions: Go synchronous function format

Build functions: Access the ClientContext

Build functions: Go

Event-triggered functions

Event function payloads

Event functions signature

Identity and Functions

Functions: Identity and clientContext

Identity event functions

Function logs

Functions: Usage and Billing

Functions: Changing levels

Deploy functions

Deploy functions