Is there a way to mock backend response for Front End?

Question

I need these abilities.

• Track Requests being made and their responses.
• Put Request on modification filter which would either modify the request header/body and/or response's header/body for a certain url.
• Be able to specify how closely to match request to apply modification (i.e. if url matches vs all headers matches vs body matches too).
• Replay requests.
• Intercept and modify on live. Save Requests.

I wish postman could do it.

I have not been able to find chrome extension that does this. Most allow to modify header not body of request and none allow to mock response data.

I am open to terminal tools or stand alone tools.

Also assume i dont have control over backend at all or at the moment.

This can be called stubbing api response as well.

Answer 1

I think Charles Proxy is what you're looking for. It lets you perform response rewrites on the fly, in addition to a whole bunch of other really useful things.

it's a paid application, but does have a free trial period.