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List All AWS Lambda Function Names

·1 min
AWS Lambda CLI
Table of Contents

When managing multiple Lambda functions, you often need a quick inventory. The AWS Console works, but clicking through pages is slow when you just want a list.

The Command #

aws lambda list-functions | jq '.Functions | sort_by(.FunctionName) | .[].FunctionName'

This gives you a clean, alphabetically sorted list of function names - one per line.

Breaking It Down #

  • aws lambda list-functions - returns JSON with all Lambda metadata
  • jq '.Functions' - extracts the array of function objects
  • sort_by(.FunctionName) - sorts alphabetically
  • .[].FunctionName - pulls just the name from each object

Variations #

Get function names with their runtimes:

aws lambda list-functions | jq -r '.Functions | sort_by(.FunctionName) | .[] | "\(.FunctionName) (\(.Runtime))"'

Filter by runtime (e.g., find all Python 3.8 functions):

aws lambda list-functions | jq -r '.Functions[] | select(.Runtime == "python3.8") | .FunctionName'

Count total functions:

aws lambda list-functions | jq '.Functions | length'

Note on Pagination #

If you have more than 50 functions, list-functions paginates by default. Add --no-paginate or use --max-items to get everything in one response, or let the AWS CLI handle pagination automatically with --output json.