API for external application

[Renat]

Is it possible through some API to provide access to external applications outside Virtuemart online store. Are there any plugins for viruemart?
I need actions by this API: control products, categories, import and export.
P.S.
In direct connection to "MySQL" online store has its drawbacks.
1) Invalidity
2) It works only if you have installed an external access of muscle
3) Instability with a large volume database
Please, tell in what direction to move

[Renat]

Help me, please. Where to try to look for? Do experience such not?