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Connect to AWS Lambda

Learn how to connect AWS Lambda to Retool.

You can use the AWS Lambda integration to create a resource and make it available in Retool. Once complete, your users can write queries that interact with AWS Lambda data.


The AWS Lambda integration requirements depend on whether you have a cloud-hosted or self-hosted Retool organization. You may also need to make AWS Lambda configuration changes before creating the resource.

Sufficient user permissions to create resources

All users for Retool organizations on Free or Team plans have global Edit permissions and can add, edit, and remove resources. If your organization manages user permissions for resources, you must be a member of a group with Edit all permissions.

Allow Retool to access the data source

If the data source is behind a firewall or restricts access based on IP address, then you must ensure that your Retool organization can access it. If necessary, configure your data source to allow access from Retool's IP addresses.

CIDR IP addresses
Individual IP addresses
AWS Lambda settings and authentication

You must have sufficient access and familiarity with your AWS Lambda data source so you can provide:

  • Required connection settings (e.g., URL and server variables).
  • Authentication credentials (e.g., API keys).

In some cases, you may need to make changes to your AWS Lambda configuration, such as generating authentication credentials or allowing access through a firewall. Refer to the configuration and authentication sections to learn more.

1. Configure the resource

Sign in to your Retool organization and navigate to the Resources tab. Click Create new > Resource, then select AWS Lambda.


Specify the name, location, and description to use for your AWS Lambda resource. Retool displays the resource name and type in query editors to help users identify them.

Provide the following configuration settings to create the resource. Depending on how your data source is configured, you may also need to provide optional settings for Retool to connect.


The name to use for the resource.


A description of the resource.

Override default outbound Retool region

Retool connects to your data source from the us-west-2 region. Choosing a different outbound region can improve performance through geographic proximity.

us-west-2US West (Oregon)
eu-central-1(Frankfurt, Germany)


The AWS Lambda integration supports the following authentication methods. Depending on which authentication method you use, you may need to make changes to your AWS Lambda configuration.

AWS Identity and Access Management

Authentication is performed using the provided AWS security credentials. You must be able to obtain and provide these credentials to create the resource.


The AWS region with which to connect (e.g., us-east-1). This is often part of the base URL.

us-east-1US East (N. Virginia)
us-east-2US East (Ohio)
us-west-1US West (N. California)
us-west-2US West (Oregon)
af-south-1Africa (Cape Town)
ap-east-1Asia Pacific (Hong Kong)
ap-northeast-1Asia Pacific (Tokyo)
ap-northeast-2Asia Pacific (Seoul)
ap-northeast-3Asia Pacific (Osaka)
ap-south-1Asia Pacific (Mumbai)
ap-south-2Asia Pacific (Bahrain)
ap-southeast-1Asia Pacific (Singapore)
ap-southeast-2Asia Pacific (Sydney)
ap-southeast-3Asia Pacific (Jakarta)
ap-southeast-4Asia Pacific (Hong Kong)
ca-central-1Canada (Central)
eu-central-1Europe (Frankfurt)
eu-central-2Europe (Warsaw)
eu-north-1Europe (Stockholm)
eu-south-1Europe (Milan)
eu-south-2Europe (London)
eu-west-1Europe (Ireland)
eu-west-2Europe (London)
eu-west-3Europe (Paris)
me-central-1Middle East (Bahrain)
me-south-1Middle East (Bahrain)
sa-east-1South America (São Paulo)
us-gov-east-1AWS GovCloud (US-East)
us-gov-west-1AWS GovCloud (US-West)
Access key ID

The access key ID with which to authenticate.

Secret key ID

The secret key ID with which to authenticate.

Role to assume (ARN)

A different role to use for accessing the API.

3. Test the connection

Click Test Connection to verify that Retool can successfully connect to the data source. If the test fails, check the resource settings and try again.

Testing only verifies connection

Testing a connection only checks whether Retool can successfully connect to the resource. It cannot check whether the provided credentials have sufficient privileges or can perform every supported action.

4. Save the resource

Click Create resource to complete the setup. You can then click either Create app to immediately start building a Retool app or Back to resources to return to the list of resources.

Wrap up

Your AWS Lambda resource is now ready to use. To start querying data:

  1. Add a Resource query to an app or workflow.
  2. Select the AWS Lambda resource from the resources dropdown.
  3. Write and run a query.