Is there an enru live translation service with API?

Question

API

Good day!
We need a service with a live, human, translation from the API. But what would be somehow regulated terms of translation. Translation is planned both from en to ru and vice versa.
It would be very desirable that the API would support the ability to specify individual fields (for example, title, tags, body text). Well, maybe in some cases it will be important for the translator to know the gender of the author.
Are there any? Few requests are planned - 3/4 per day every 500 characters, i.е. I would like not to "conclude an agreement", but a public service.

Answer 1

Yandex Translator, gives a million characters every month for free.