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Show HN: Free API service for crypto and foreign exchange rates

62 pointsby arzzenalmost 5 years ago

13 comments

Wowfunhappyalmost 5 years ago
Is it possible to retrieve results over HTTP?<p>I&#x27;m probably a unique use case, but I&#x27;d like to use this to &quot;fix&quot; the exchange rates portion of Apple&#x27;s currency converter dashboard widget, and I want it to work even on very old OS&#x27;s. That means I can&#x27;t use TLS 1.2, and the root certs are often out of date anyway.<p>I&#x27;m currently using exchangeratesapi.io, which doesn&#x27;t support HTTP either, but does support TLS 1.0, so it kind of works. However, outdated root certs mean I need to instruct users to manually install exchangeratesapi&#x27;s certificate, which I&#x27;d rather not do.
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gkobergeralmost 5 years ago
I was looking for this exact thing a few weeks ago, and couldn&#x27;t believe how difficult it was to find a decent, free API for crypto exchange rates (I just wanted to write a little script that tracked my investments, nothing huge.)<p>(Also, I&#x27;m the founder of ReadMe; we do API docs... if you want to use us, my emails in my bio :) )
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de6u99eralmost 5 years ago
Thanks for sharing, that&#x27;s really useful. I realized you did the javascript example using XHR Any reason why you didn&#x27;t use fetch?<p>``` fetch(url) .then((resp) =&gt; resp.json()) .then((data) =&gt; { console.log(data) }) ```<p>instead of<p>``` var requestURL = &#x27;<a href="https:&#x2F;&#x2F;api.exchangerate.host&#x2F;latest&#x27;;" rel="nofollow">https:&#x2F;&#x2F;api.exchangerate.host&#x2F;latest&#x27;;</a> var request = new XMLHttpRequest(); request.open(&#x27;GET&#x27;, requestURL); request.responseType = &#x27;json&#x27;;<p>request.send(); request.onload = function() { var response = request.response; console.log(response); } ```
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AnonCalmost 5 years ago
Your website looks good. The examples in several languages is also a nice touch (expected from API documentation).<p>I do have plenty of questions though.<p>Does this service get historical rates from its sources in real time or does it store those in its own local database?<p>How long will this service be free for? What’s the business model that’s being thought about?<p>What kind of rate limiting, if any, is used so that a developer who uses these APIs doesn’t have their app go down because someone else is hammering the server with a lot of requests?
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d33lioalmost 5 years ago
Very slick site! In a previous life I worked in the crypto transaction tracing space, I ended up building my own tool to do what your API does, but this is much more polished than my tool haha.<p>Very curious about the front-end! I&#x27;d get many more side-projects out the door if I understood the path to get a polished landing page &#x2F; front-end like yours!
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davidajacksonalmost 5 years ago
How does this compare to <a href="https:&#x2F;&#x2F;www.sendwyre.com&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.sendwyre.com&#x2F;</a>? Seems like you have multiple features including some conversion so interested in hearing about the differences.
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zwaragalmost 5 years ago
I like the illustration of the people building the application a lot. Is there a name for this type of image? Say I&#x27;d like to hire someone to make one of these images, what would I be searching for?
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ejanusalmost 5 years ago
Great, I am look for stuff like this. Can you connect to oracle to make it easy to integrate with Solidity contract ?
aaomidialmost 5 years ago
I&#x27;ve been wanting something like this for so long...
7ewisalmost 5 years ago
Where do you get your cryptocurrency prices from?<p>What&#x27;s the daily run rate like, sustainable? I see you have GitHub donations, is that covering costs currently?
xfalcoxalmost 5 years ago
How frequently you update rates for intra day foreign exchanges? let&#x27;s say USD -&gt; EUR
ASVVVADalmost 5 years ago
self plug: an easy to use go library built on this with smart optional caching <a href="https:&#x2F;&#x2F;github.com&#x2F;asvvvad&#x2F;exchange" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;asvvvad&#x2F;exchange</a>
tradertefalmost 5 years ago
How do you plan to make money?