About 3 months back, I got a call for an opportunity and they asked for the expected salary. I agreed for X dollars. Last week, I saw the same job posting on a different site with offered salary bracket from [X to X+2].
Today after getting confirmed by their client, they send a drafted version of Offer mentioning X dollars as pay which is the lowest limit I had requested. I know, my entire interview performance was great and I am a good fit for the client, but how do I ask the contractor to give me a better pay than what I agreed initially without sounding greedy and rude?