What services allow you to transfer bitcoin?

Question

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Please tell me the services with api, with which you can transfer bitcoins between wallets. But only that would be without extra. Those. not that the wallet was tied to the system account and the like. In fact, a gateway for translating with api
Or a library that allows you to do this directly, without intermediaries.
What would give the addresses of wallets, the key for the donor and transferred to another wallet (let him have a commission). The main api is to write a simple script for mass transfer.
Please tell me, except for this https://blockchain.info
For one reason or another, I can't use this service

Answer 1

Thanks to all. Found this system, commission zero, and allows you to do what I want gourl.io

Answer 2

Bitcoin is based on the blockchain, it is its own api for sending bitcoins

Answer 3

apibtc.com has the smallest commission I've ever seen, at least I have. I myself have been using this gateway for 3 months.