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ccxt
A JavaScript / TypeScript / Python / C# / PHP cryptocurrency trading API with support for more than 100 bitcoin/altcoin exchanges
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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
You can take a look at https://github.com/aloysius-pgast/crypto-exchanges-gateway (which you can selfhost. I'm one of the devs). And if you want to develop it yourself, I suggest taking a look at https://github.com/ccxt/ccxt which supports a lot of different exchanges
You can take a look at https://github.com/aloysius-pgast/crypto-exchanges-gateway (which you can selfhost. I'm one of the devs). And if you want to develop it yourself, I suggest taking a look at https://github.com/ccxt/ccxt which supports a lot of different exchanges