From where does sites like coinmarketcap, worldcoinindex etc get the data from?

[Coinzzz]

Hi,

I was wondering that the altcoins statistical data, charts we see everyday on the sites like CoinMarketCap, WorldCoinIndex etc, from where does these sites grab the data?

Is there a particular API or something? If I have to build something like that from ground up for my personal use how can I go about it? Where can I start?

I am really curious and interested in knowing this, also what would be the cost required? Any guesses?

Thanks a lot in advance
Hope you all are having a wonderful day.

Cheers!

[bathrobehero]

There are freely available APIs usually.

For example Bittrex's API page: https://bittrex.com/home/api

And they probably also use block explorer APIs to get numbers like supply.

[Coinzzz]

There are freely available APIs usually.

For example Bittrex's API page: https://bittrex.com/home/api

And they probably also use block explorer APIs to get numbers like supply.

I see, so these sites use bittrex's API? Or the other exchanges offer free API's too(like YoBit) and can be used by anyone.

So basically the exchanges have API's available for anyone to freely use and therefore sites like coinmarketcap etc uses their API to get all the data?!.

Thanks so much btw

[bathrobehero]

There are freely available APIs usually.

For example Bittrex's API page: https://bittrex.com/home/api

And they probably also use block explorer APIs to get numbers like supply.

I see, so these sites use bittrex's API? Or the other exchanges offer free API's too(like YoBit) and can be used by anyone.

So basically the exchanges have API's available for anyone to freely use and therefore sites like coinmarketcap etc uses their API to get all the data?!.

Thanks so much btw

Pretty much.

Examples:
https://poloniex.com/support/api/
https://yobit.net/en/api/

Coinmarketcap also have their own free API: https://coinmarketcap.com/api/

They're free as they are just tiny bits of information in a simple format, just don't request data too frequently, like every few seconds.

[hilariousetc]

There's a FAQ on coinmarketcap which explains where they get their data:

https://coinmarketcap.com/faq/

How are the prices calculated for various the cryptocurrencies?

Price is calculated by taking the volume weighted average of all prices reported at each market. Sources for the prices can be found on the markets section on each cryptocurrency page. For example, Bitcoin's markets.

Click on the individual coins to see what exchanges each particular one uses.

[Coinzzz]

There are freely available APIs usually.

For example Bittrex's API page: https://bittrex.com/home/api

And they probably also use block explorer APIs to get numbers like supply.

I see, so these sites use bittrex's API? Or the other exchanges offer free API's too(like YoBit) and can be used by anyone.

So basically the exchanges have API's available for anyone to freely use and therefore sites like coinmarketcap etc uses their API to get all the data?!.

Thanks so much btw

Pretty much.

Examples:
https://poloniex.com/support/api/
https://yobit.net/en/api/

Coinmarketcap also have their own free API: https://coinmarketcap.com/api/

They're free as they are just tiny bits of information in a simple format, just don't request data too frequently, like every few seconds.

I see.. Thanks man

On coinmarketcap api page they say "Please limit requests to no more than 10 per minute." is it applicable for only one coin or global for all coins? eg I can request data of all the available coins 10 times in a minute or data of just one coin 10 times a minute.

[maeusi]

There are freely available APIs usually.

For example Bittrex's API page: https://bittrex.com/home/api

And they probably also use block explorer APIs to get numbers like supply.

I see, so these sites use bittrex's API? Or the other exchanges offer free API's too(like YoBit) and can be used by anyone.

So basically the exchanges have API's available for anyone to freely use and therefore sites like coinmarketcap etc uses their API to get all the data?!.

Thanks so much btw

Pretty much.

Examples:
https://poloniex.com/support/api/
https://yobit.net/en/api/

Coinmarketcap also have their own free API: https://coinmarketcap.com/api/

They're free as they are just tiny bits of information in a simple format, just don't request data too frequently, like every few seconds.

I see.. Thanks man

On coinmarketcap api page they say "Please limit requests to no more than 10 per minute." is it applicable for only one coin or global for all coins? eg I can request data of all the available coins 10 times in a minute or data of just one coin 10 times a minute.

As I understand, each API has a maximum request of 10 per minute and is not global limited. So you could have many more requests in the whole, but I am not sure.
But to verify this, you could easily open a support ticket. On my experience they answer fast and friendly.

[crismass1225]

try bittrexx and https://coinmarketcap.com/api

[Coinzzz]

Thanks all.. I'll need to learn little bit of python and how to work with these APIs and all...

Or does anyone have an estimate on how much it might cost if i had to hire a programmer for this job? It shouldn't be much costly as he just have to grab data from APIs and present it nicely.