Questions tagged [api]

This tag should be used for questions related to APIs offered by any Bitcoin related service. An API is an Application Programming Interface and services often have APIs available for developers to write software which accesses information offered by the service.

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1answer
26 views

How can you create a transaction with multiple inputs from the Blockcypher API?

For example, I have two addresses and each of them has received 1 BTC. Now, I want to transfer 1.5 BTC to another address. How can I achieve this using the Blockcypher create transaction API?
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0answers
11 views

Authentication error with Blockchain Wallet API

I successfully integrated the blockchain-wallet-api into an application which is currently on production. The challenge I'm having is that even though I was able to disable email login authentication ...
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1answer
30 views

how can i coding wallet to build exchange to client withdraw

i want to build a cryptocurrency exchange so my question how is best way and secure way to depositing and withdrawing clients ? should i use api like https://cryptoapis.io or https://www.blockcypher....
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1answer
291 views

Getting multiple OHLCV candles with API with one request

i don't know if this is the right place to ask this, but i haven't found a proper one to do so, so here we go : I wanna get only the LAST OHLCV candle from multiple markets with the cryptocompare api ...
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0answers
17 views

How to get utxo for address on testnet using python?

Pybitcointools is deprecated unfortunately and other Python libraries don't really work. Do you know any APIs that serve UTXOs for an address?
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1answer
27 views

Check wallet address balance programmatically in PHP using Blockchain wallet api

I'm tyring to fetch my wallet balance programmatically using the Blockchain wallet api. Currently I was expecting that a simple api call to https:/blockchain.info/merchant/$my_guid/balance?password=$...
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1answer
71 views

Blockchain endpoint working

I wanna clear this thing that how blocks are retrieved and created in from the nodes using an end point. The end point is basically centralized and have nothing to do with network if i'm not wrong. Is ...
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3answers
2k views

Is there a public repository/api of coin/token logos

I am developing an cryptocoins related app and I would like to display cryptocoin logos there for all coins available for trade. Is there an API out just a publicly accessible repository that would ...
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2answers
2k views

Which API provides the logo for a cryptocurrency?

I've been searching for an API that returns the logo/image for a cryptocurrency. API's like CoinCap.io and Bittrex don't return this information in the response. Is there any public API which provides ...
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2answers
253 views

Specified data directory does not exist - but it does…

anyone ever had a similar issue where the directory exists but bitcoin-cli isn't recognizing it? Perhaps this is related to me setting the folder up as a symlink to my external HDD? Thank you! ...
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2answers
171 views

API for multiple blockchains

Is there an API to get data for multiple blockchains? Most blockchain explorers already offer an API but I'd like to be able to get information for different blockchains through the same API.
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2answers
2k views

Reading Bitcoin Raw Transaction

I want to understand Bitcoin data structure. So i try to understand a raw transaction in json format. When i checked the blockchain.info API documentation, i see that input structure is defined for ...
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5answers
9k views

How to get the list of transactions of input/outputs for a bitcoin address in JSON format?

Is there an example of how to get all the transaction data for a bitcoin address in json format?
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2answers
4k views

BlockChain.info testnet wallet and API

Does blockchain.info provide wallets and API service for testnet? This information is quite hard to find from their site.
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1answer
19 views

Api to automatically check the status of a BTC transaction

My team is working for a community of members who make donations in BTC to support a cause from time to time. The donations the details are stored in a database and displayed on their personal ...
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1answer
37 views

How to determine if BTC has been received from a particular address

I have been wondering if there is an api available that can enable me know if a certain amount of Bitcoin has been received from a particular wallet address. For the moment I have only be ...
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1answer
211 views

Bitcoin Pro API - How do you format start/end time for Historic Data?

I don't understand how to format the start and end time per https://docs.pro.coinbase.com/#get-historic-rates The sample time is "1415398768" which makes no intuitive sense to me, and when I tried ...
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0answers
36 views

Bow to know how much amount my wallet sent with Bticoin-core API

I have updated bitcoin-core from version 0.16 to 0.17 and found that there is no way to see how much amount I sent only (excluding received amount) from my wallet. With bitcoin-core version 0.16, I ...
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1answer
232 views

Blockchain Receive API - custom Parameters

I am trying to get variables back from the callback URL, but I can't figure out how to add custom parameters correctly. This is how I have them written right now: $newAddy = json_decode(...
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0answers
14 views

How can i import a btc wallet into blockchain api v2

Hello I will use the bitcoin wallet api v2 to make payment from my website. My problem is i need to import my electrum wallet into blockchain wallet api v2, in the documentation i see that can be ...
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1answer
228 views

how to place a bitforex api buy order

I have read the documentation for BitForex on placing a buy order here: https://github.com/bitforexapi/API_Doc_en/wiki/Order Then after understanding that, I read the API Call Description ...
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1answer
25 views

JSON with price AND daily change? [closed]

May be someone could point me towards a public API with Bitcoin price AND 24h change? Like $7'602 +2.3%? All APIs I've found (like coindesk's) only contain price, not change :(
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1answer
259 views

Bittrex API market history — interpreting OrderType

The Bittrex API has a request to get the market history: https://bittrex.com/api/v1.1/public/getmarkethistory?market=BTC-DOGE which gives a response containing the following fields: "Id" "TimeStamp"...
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2answers
4k views

Simple Address check via API

So I have a wallet with thousands of addresses, I want to know how can I check the blockchain whether or not a transaction has been made to one(or another) of the addresses?
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3answers
1k views

Get transaction that spent a transaction id

The blockchain.info API allows for querying information about a particular Transaction by its ID. But if you want to follow the coins to the next transaction, I'm not seeing what the next query should ...
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1answer
345 views

Kucoin API buy and sell

Why, when I using Kucoin API, get_tick, for market info, I see, that sell is bigger buy? Example from oficcial API Documentation: With a symbol param { "coinType": "KCS", "trading": true, ...
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1answer
281 views

What is the right method to calculate Relative Strength Index (RSI) for incoming real time data?

I am working on a trading bot that computes values for several indicators including the RSI. I subscribe to real time minute-level market data from an exchanges, and as new data arrives, I get the ...
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1answer
2k views

Basic bittrex api question

I read the api documentation but I could not find anythin related to market buy and sell commands. Where do I find this information? Moreover, I read the following from the api site https://bittrex....
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1answer
371 views

Shorts, longs BTC data

I am trying to use the Bitfinex API to get historic shorts,longs BTC/USD data.So, the Bitfinex gives size data with Available values: '1m', this equals last 2 hours, i need last two month at least. ...
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1answer
314 views

Get wallet address when creating wallet with blockchain API

Using the API endpoint http://localhost:3000/api/v2/create I get this response: {"guid":"58671a54-7d60-4319-8742-b06fb2a8d060","address":"...
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1answer
62 views

Question Regarding Send_to_many function of blockchain wallet api

I am using send to many function of blockchain wallet api and i am facing issue. when upto 20 transaction done then after i get error in terminal that 1538652825520 - error: ERR_PUSHTX ...
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1answer
2k views

How to send Bitcoin in the Testnet?

I'm using this library: https://github.com/lian/bitcoin-ruby And here's my code: require 'open-uri' require 'net/http' require 'net/https' require 'json' require 'bitcoin' Bitcoin.network = :...
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1answer
664 views

Signature for this request is not valid

im testing the binance api but cant get over the signature problem can u spot a mistake on my signature?: const crypted = CryptoJs.HmacSHA256("timestamp=" + new Date().getTime().toString() + "&...
2
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1answer
394 views

receive payement bitcoin api like blockchain API v1?

I am looking for a API function as the first version of the API blockchain.info (no API key). If there are none, I'd like you to tell me where to turn to create an API with a similar operation and a ...
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1answer
338 views

Bitcoin cash - Transaction history as JSON

Is there a way/a service to retrieve all bitcoin cash transaction for a bitcoin cash address in JSON format? Like the API of blockchain.info offers for bitcoin core?
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1answer
1k views

How to integration Blockchain Payment API in Asp.Net?

I am new to using the Blockchain API. I have tried several times to use https://blockchain.info/merchant/$guid/payment?password=$password&second_password=$second_password&to=$to&amount=$...
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4answers
599 views

Single API Platform for multiple cryptocurrency?

I am wondering for a single API platform where i will be able to trade for below 5 crypto currency : 1) Bitcoin 2) Litecoin 3) Ethereum 4) Dash 5) Monero So, are you guys supporting all these in 1 ...
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2answers
620 views

How can I get the date of the last transaction from the blockchain.info API?

Is there a way to request the date of last transaction via API? I run a request to see balance of my addresses and need to request the date of the last transaction, how would I do that?
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1answer
235 views

Blockchain.info Payment API -> Callback gets a 302?

I want to integrate the Blockchain.info Payment API and everything works fine so far. The callback works and triggers the code on my server, if a payment comes in. But if I check the callback log of ...
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0answers
35 views

Getting mass addresses current balance

How can i get the current balance of massive addresses? I'm getting address balances now on blockchain.info but I need to check about 1000 of addresses in one minute. The issue is that they blocking ...
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1answer
58 views

Is there such a service as an unlimited Bitcoin wallet with an API?

Well, I did tons of research and currently I'm using bitcoinlib for python to have a wallet which should be able to hold over one million addresses and occassionally broadcast transactions. It has ...
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1answer
614 views

Blockchain.info and fetching transactions for a address between dates

I'm trying to fetch transactions for a certain bitcoin address, but I only need to fetch transactions within a specific date range. Now, I had a look at the blockchain.info api and it seems like the ...
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1answer
68 views

Unable to sendcoins using bitgo express apis

Trying to access API URL: https://test.bitgo.com/api/v2/tbtc/wallet/walletid38u5348t9yj958jtv985j89g5/sendcoins But every time getting same response: { "error": "You have called a BitGo Express ...
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1answer
268 views

testnet.blockchain.info api not showing latest results?

I sent a transaction to the testnet address mzWCWQU6phb9rKSAiQ4FBU92sGYtY7tjPH a few days ago and I have been using the testnet.blockchain.info api for a while now in my project. It was working fine ...
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2answers
191 views

Bitcoin Transaction using API with Custom Fees

I want to transfer Bitcoin from one individual address to another using API. But I want to set Transaction fees as per my requirement. So How can I do it ? Right now I am using blockchain-transaction ...
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1answer
138 views

Calculate fees with Blocktrail/btc.com SDK

First of all hi and thanks for your support and your time. I want to calculate the fees of a blocktrail transaction with blocktrail SDK, before making the transaction, in order to let the recipient ...
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3answers
787 views

GDAX Post API not working VB.net

I am having trouble with a (400) bad request on POST requests. I am able to execute all Get and Delete requests with the same signature process, but obviously the body is string.empty. We have tested ...
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1answer
195 views

Is there an API with which I could obtain the exchange rate of bitcoin to dollar some time in the past by giving the desired time as parameter?

I would also like the the result to be precise to hour (or minute). It is for a java program. I have looked around, but the service I have found could not satisfy my need: http://www.coindesk.com/...
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2answers
65 views

Start and end parameters in historical price data request are ignored

I trying to do some testing on historical coinbase data. Because I can only get 300 datapoints per request. Im looping the request and change the start and end paramter to got backwards. My requests ...
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1answer
26 views

How do I ask other nodes for their stale blocks?

I want data on as many stale blocks as possible. Is there a way to ask peer nodes to run "getchaintips" and get their results? Previously, I used Blockchain.info's API call for this, but it seems ...

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