Can, we do post requests using https://hub.meltano.com/extractors/tap-rest-api-msdk/ because as per the code I review for this tap and the meltano sdk we can only make get requests is there any other way out ?

Hey @Dinesh Nariyani 👋 That's right, you can only make GET requests (see code). I suggest opening an issue on the tap's repo describing your use case. The implementation is probably a good amount of work since using POST also probably means adding a request body and the corresponding user-facing settings for that.

Also, can we store headers in .env as secrets because it may expose the api key in .yml ?

You can configure any plugin settings as environment variables, including through `.env`: https://docs.meltano.com/guide/configuration/#available-plugin-environment-variables

thanks for the help @Reuben (Matatika)