accessing data using curl

Question

HII I NEEDED SOME INFORMATION WHICH I GOT FROM SOME WEBSITE USING CURL .THE INFORMATION IS OPEN TO ALL LIKE pnr AND bill STATUS USER CAN CHECK ONE ID INFORMATION AT ONE hit AND I WANTED TO GET MULTIPLE IDS INFORMATION AT ONE HIT..SO I GOT THE SOLUTION BY POSTING VALUEs USING CURL...I DON'T WANT TO DO SOME ILLEGAL THING SO I JUST WANTED TO KNOW IS IT LEGAL OR NOT ..