API Integration work for our ticket portal

Dear Coders, We are managing a web portal for online bus ticket reservation. The present system is developed on PHP & My SQL. We do manage individual web sites to the travel operators with single database. & Also we have integrated single API in the present system. WHAT WE NEED..... 1. Coder has to intergate 2 more different APIs in our website to book tickets in our website (We can provide you the documentation & other details). 2. There is some problem with the seat layout display in th epresent system & that also should be fixed when integrating new APIs. 3. Coder has to develop our API system with documentation to share our complete inventory to any other websites. As we also manage individual tour operators software we need to have flexibility to manage API for individual websites of the operators when any operator registers through our registration form. This API will be integrated to their own website irrespective of their technology. You can ask me for any quarries & will respond to you ASAP. This is going to be a continuous work for a serious individual... Thanks for your interest again... Anil.