Consul supports Amazon Web Services Lambda functions, which are event-driven programs and scripts that return a response. Learn about Consul's requirements for registering and invoking AWS Lambda functions in your service mesh.
Lambda functions are programs or scripts that run in AWS Lambda. The functions process events and return responses. Refer to the [AWS Lambda website](https://aws.amazon.com/lambda/) for additional information.
## How AWS Lambda Functions on Consul Work
You can register AWS Lambda functions in Consul and invoke them from mesh services.
### Registering Lambda Functions
Registering AWS Lambda functions into Consul requires [registering a service](/docs/discovery/services)
and storing a [service defaults configuration entry](/docs/connect/config-entries/service-defaults)
into Consul.
We recommend using [Lambda registrator](https://github.com/hashicorp/terraform-aws-consul-lambda-registrator)
to automatically synchronize Lambda functions into Consul. Lambda functions can
also be manually registered into Consul when using Lambda registrator is not possible.
See the [Registration page](/docs/lambda/registration) for more information
