Alpaca
API for Stock, Options & Crypto Trading
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Hiten Shah

Alpaca Data API - Free real-time stock market data API

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Alpaca Data API is your new go-to data API for building trading apps & algorithmic trading strategies and is free to use. It provides real-time stock price data with up to 99.95% price accuracy compared to well-known expensive consolidated market data feeds.

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Yan Cheng
Thank you for providing the API, for free. Do you mind to elaborate more, on how do you able to provide these APIs for free? What's your plan going forward, to make the service sustainable in long run? As, if we were to invest our resource to integrate with your API, we need to ensure such service will be there for a very long time. We really don't mind to pay, if we can generate return from our product, to cover the cost. As far as I know, the current available free APIs, are provided directly from a stock exchange named IEX. But, since their trading volume is way lower than well known NYSE, ... the provided information doesn't paint the market picture accurately. As developer, I can understand why most API providers aren't able to make API free. API providers are required to pay a huge sum of $ to stock exchanges themselves. Thank you very much for your effort.
Yoshi Yokokawa
Maker
@yccheok Hi Yan, thanks for your comment! Our business model is this https://alpaca.markets/docs/abou... , and we make revenue as a broker-dealer. We are a registered broker, and more importantly, we are an API company building developer products for the community. It is important for us that we are contributing to the developer community in financial markets through offering easily accessible API products - this is a part of our goal to achieve providing financial market access to the people all over the world 💪 If you don't mind, do you wanna share what kind of services you are planning to build?
Amy Tansali
Love it! Great job!
Yoshi Yokokawa
Maker
@writejournal Thank you Amy! Have you building trading apps or algorithmic trading strategies?!
Bilal Cagiran
I think what you guys are doing is great and being able to use these information definitely help us to build amazing apps. Thanks for your efforts and happy to help, not sure if you are open source or not :)
Yoshi Yokokawa
Maker
@bilalcagiran Thank you Bilal! Yes we are committed to the OSS here https://github.com/alpacahq/ where the community has been building multi-language SDKs :) Have you been involved in trading??
Dovetail
Wow. This is awesome!
Yoshi Yokokawa
Maker
@lovedovetail Thank you! Are you working on any apps to use the market data ?!
Fumi
cannot wait for more expansions and growth of this product!!
Yoshi Yokokawa
Maker
@fumiaki_nagase Thank you Fumi! You are now doing some algorithmic trading right?! Let's do it!
Luigi Pepe
Are you going to make this service available also abroad? I mean not just the paper money, the live trading as well?
Yoshi Yokokawa
Maker
@luigi_pepe Definitely :) Pls try to make a live trading account now how it goes!
Austin Traver
This is huge
Yoshi Yokokawa
Maker
@austin_traver thanks for your comments and support!!
srinivasan
This is really awesome!! I was looking some thing similar for Indian stock market. Thanks
Yoshi Yokokawa
Maker
@srinivasan1 thanks for your comments and support!! I wonder how it is like in the indian stock market!
Ike Victor
@yokokawa244 This is awesome! would love to stop using polygon's endpoints. have a small request on the request parameter of the "get list of bars" endpoint though. Is it possible to add custom timeframes? Example 10m, 4h, 1W bars?
Yoshi Yokokawa
Maker
@naijamoto thanks for the feedback! Pls feel free to reach out to support at alpaca dot markets !
Marat Khajrullin
@yokokawa244 There is description of the fields of Trade schema on page https://alpaca.markets/docs/api-... , but I cannot find the discriptions of fields "c - condition flags" and "z - tape ID". Where can I find it?
Yoshi Yokokawa
Maker
@marat_khajrullin thanks for the feedback! Pls feel free to reach out to support at alpaca dot markets !
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