Testing TCP/IP Socket and HTTP Connection Online

I have developed an application in which I have used SIM808 module for cellular communication (GPRS). I am facing a problem that I am unable to test the TCP/IP Socket and HTTP Connection as the server application is not yet complete. As far I understand I would require some testing mechanism that would be hosted on Internet (Online). Kindly advice how should I test the TCP/IP Socket and HTTP Connection. Are their and tools available like Hercules (TCP) or Postman (HTTP) that are hosted on Internet?

A SIM808 is just a chip module, what else is wrapped around it?
SIM808 | SIMCom | smart machines, smart decision | simcom.ee

Why do you need an online solution?

I guessed you have also some kind of CPU and memory along with your SIM808, along with a network connection (either wired or wireless).
Not to mention an OS running on the board.

You just plug it into your local LAN, and open a TCP connection to it from your development machine.

Sorry, for the late reply.
I am looking for mechanism to test my TCP/IP socket and HTTP request that I issue through the SIM808 module communicating via GPRS.
I am looking for something like Hercules TCP Sever or Postman HTTP monitor.