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> a request/response architecture

fundamentally it's a HTTPS server too, you can actually invoke them with direct HTTPS calls, no SDK required. [1]

[1]: https://docs.aws.amazon.com/lambda/latest/dg/urls-invocation...

Function URLs aren’t part of lambda, they’re just a thin abstraction around API Gateway v2 (http APIs) that allow all calls, and have randomly generated domains, so you’re not gaining anything and losing some functionality by doing this instead of running an API GW with lambda proxy integration yourself. If setting up API GW is too difficult, you could use SAM or Serverless Framework to automatically provision it. Then you can have a real domain, SSL, failover, endpoint validation, etc.

>so you’re not gaining anything and losing some functionality by doing this instead of running an API GW

You're gaining the fact that Function URLs are free while APIGW can be pretty costly, as well as the fact that Function URLs are fantastically less complex than APIGW if your use cases fit it.

Function URLs are not limited to 30 seconds. That's massive

I think they are only an asynchronous invocation in that case though? The reason they do that is they dont want your connections holding a port for 15 minutes.

I don’t get why they don’t support gRPC (HTTP 2)? They already support Websockets.

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