[turtlebits]

You can easily do this with AWS Lambda and the boto3 library. You get logging, metrics and alerting if you want too. AWS has a generous free tier.

For python devs, this is a great framework to easily create and deploy them - https://github.com/aws/chalice.

[zowanet]

Provided your request and response payload is guaranteed to be <6MiB (for synchronous invocation) or <256KiB (for asynchronous invocation).

These are AWS Lambda's hard limits, and are too low for many webhook applications.