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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17 views

Bitcoin Core GUI gettransaction implementation

The cli users have the option to "getrawtransaction txid true" in order to find valuable information about a transaction that could be theirs. This is a very powerful api call that effectively ...
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38 views

API for raw Bitcoin latest block data?

I would like to get the full raw data on the latest bitcoin block. I was hoping I could get this from an API. I looked at blockchain.com's API's but these don't seem to provide the full data for each ...
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Authentication error with Blockchain Wallet API [closed]

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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19 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
73 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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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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19 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
30 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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2answers
65 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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39 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
60 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
22 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
80 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
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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1answer
38 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
76 views

Get invoice amount from payment request - LND REST API

I'm using the REST API of my LN node to generate and pay invoices. I would like to know how to get the invoice amount/value in sats from the payment request I receive. I found this : https://api....
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1answer
112 views

How do I fetch the price data from CoinGecko? [closed]

I don't understand their API: https://www.coingecko.com/en/api It says: /simple/price Get the current price of any cryptocurrencies in any other supported currencies that you need. But then ...
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33 views

Is there a way to test Blockchain.info APIs? [closed]

I'm trying to set up Blockchain.info web APIs to notify me when I receive a BTC payment: https://www.blockchain.com/api/api_receive So say, if I generate a receiving address as such: https://api....
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2answers
64 views

How can I know which user made which BTC transaction?

I am making an app, and I want my users to deposit BTC coin to my address which is an exchange address (I don't have the private keys). How can I know which user made which transaction? I have a way,...
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1answer
80 views

Estimated Fees in BCOIN

I installed a BCOIN full node and I would like to calculate estimated fees for Bitcoin transactions. This functionality works perfectly in the CLI. For example: bcoin-cli fee 3 Anyway things go ...
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1answer
106 views

How to get the pool name from coinbase transaction?

Is it possible to retrieve the name of the pool that mined a block looking at the address in the coinbase transaction? For example, the address in the coinbase transaction of block ...
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1answer
43 views

blockstream API response

How do I determine if the current transaction is an outgoing or an incoming transaction from looking at the following API response? https://blockstream.info/api/address/...
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1answer
194 views

How should I handle cases like this where the documentation for Bitcoin Core states one thing, and the actual program does something else?

Bitcoin Core's RPC API call "getnewaddress" is documented here: https://bitcoincore.org/en/doc/0.18.0/rpc/wallet/getnewaddress/ It claims: Result: "address" (string) The new bitcoin address In ...
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1answer
150 views

How to use blockstream's REST api to retrieve JSON output on an address?

I have a bitcoin address and I want to get the JSON format of the balance using blockstreams api service. It's this one: https://github.com/Blockstream/esplora/blob/master/API.md#transaction-format ...
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1answer
72 views

Why is there no decentralized Bitcoin trading API?

Since nobody has answered me the last 30 times when I asked for decentralized Bitcoin trading APIs, I can pretty safely conclude that it just doesn't exist. So that's why I now ask why this is. Don't ...
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25 views

Getting Started with a Hello World Node.js App making an API call to bitcoin.org

I have been reading around trying to find where/how you can attach a SHA256 or MD5 hash (i.e. a small chunk of data) to a Bitcoin transaction, which led to OP_RETURN, but I have yet to see exactly how ...
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1answer
65 views

Local balance query for Bitcoin address

I would like to be able to query the balance of an address (not belonging to me). The data should come from a fully synced bitcoin full node inside the local LAN and I do not want to query any api ...
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1answer
81 views

how do mining pools expose their stats?

Webistes like https://miningpoolstats.stream/ must communicate with the pools somehow. What protocol do they use to retrieve information such as the pool's hashrate and what blocks have been mined by ...
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1answer
37 views

How to get all cryptocurrencies real-time statistics with no limit and free? [closed]

How can we get almost all real-time information of cryptocurrencies (rates, transactions, live prices, blocks info, wallets, etc) for developing new cryptocurrency statistics and exchange reference (...
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1answer
88 views

CryptoCompare API gives wrong historical daily OHLC data

I am trying to use CryptoCompare to get historical daily OHLC data, but the data I get seems to be wrong. For example, the following query (timestamp=1507248000) will give you data where 'open' (66.43 ...
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0answers
43 views

Blockchain.com API and needed amount

I have installed Blockchain.com platform on our server and ran some codes successfully based on its Wallet APIs. Regarding to what is said here, as we are testing this platform, we charged the created ...
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0answers
23 views

How to run and access Blockchain.info platform on a remote server?

I've installed Blockchain.info local machine on a server and got an API key for it. But it seems it's designed to work only locally and on the port 3000. I need to call APIs from another server with a ...
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1answer
119 views

How can I generate preimage for lightning network invoice? Should I?

I'm developing API library for LND REST API. Method POST /v1/invoices requires r_preimage parameter. Should I generate it or LND can do it itself if I'll not specify it? If I should do that - how to ...
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1answer
63 views

Is Bitcoin Core required for wallet projects?

My team wants to create a cryptocurrency service provider platform to Sell/Buy BTC and something else in form of web/mobile app. It's about one month that I have been studying different articles about ...
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1answer
42 views

Coinjoin API server possible?

Is there a protocol limitation (I suspect there is) that does not enable transactions across different platforms to access a 3rd party remote server (Chaumian server?) through API and create a ...
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1answer
37 views

what is exact meaning of some field of response of `getBlock` rpc api

I refer to this document for using getBlock rpc api. https://bitcoin.org/en/developer-reference#getblock { "hash" : "hash", (string) the block hash (same as provided) "confirmations" : n, (...
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1answer
58 views

Electrum address syncronization

I need to periodically check the balance of a number of bitcoin addresses (a few tens or hundreds addresses). I noticed that Electrum may syncronize a thousand or more imported addresses in a matter ...
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27 views

how to know miner of each bitcoin block [duplicate]

Do you know from what kind of API I can get miner info per each block? I've run bitcoin mainnet, and I want to know who mines each block if possbile. I've googled and read many docs but I couldn't ...
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0answers
27 views

What happened to Smartbit explorer?

I was using API located at http://smartbit.com.au to communicate with bitcoin testnet. Now API is not available anymore. Generally, whole service is gone. Some time ago (idk, like few weeks ago) chain....
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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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34 views

Coinbase Pro - Volume Bought or Sold

Using the Coinbase Pro API, is there a way to get the volume of buys vs. the volume of sells for a given timeframe, not just the daily volume in total? Right now, all I can figure is doing a series ...
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0answers
14 views

Inconsistent Volume Data from Gdax API

I've queried Gdax API in the past and it seems that the API is currently returning a completely different data set for 'Volume'. For example, when I queried the API for historical BTC prices around 1 ...
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1answer
70 views

What feerate estimation APIs are there?

Some company's, block explorers and payment processors offer a public API for feerate estimations. Is there a list of publicly available feerate estimation APIs?
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88 views

Issue while using create transaction API of blockcypher?

I am getting this error "Not enough signatures: 1 for 2 inputs" always while using create transaction API for BTC,LTC,DASH. Before few days ago its was working fine. But Now I am getting Error After ...
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0answers
76 views

How do I request fund using coinbase api

Hi I am trying to use coinbase api in php.api implementation working fine, I can check balance, creat new address all this are working fine.But facing problem on request bitcoin. I am following ...
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1answer
317 views

Checking external bitcoin address balances via JSON-RPC API

I'm using bitcoin core json-rpc api in python and am wondering why... getreceivedbyaddress() ...doesn't allow me to specify an address that isn't in my local wallet? The whole blockchain is open, ...
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0answers
31 views

listreceivedbyaddress missing transactions after restore

After restoring wallet from wallet.dat balance is identical, but listreceivedbyaddress 0 do not have the transactions associated with wallet. listunspent 0 show all the transactions, but it will ...
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1answer
29 views

can you use blockchain.info instead of hosting bitcoind for a website

If I use api calls to blockchain.info instead of hosting my own bitcoind for checking address values, is it safe?
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2answers
73 views

How to get latest 50 transactions for a BCH address?

Is there an API from where I can get latest received transactions for a bitcoin-cash address?
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0answers
47 views

Access Kucoin OHLC data from API?

I need to access kucoin Open-high-low-close (OHLC) data from Kucoin API. Looking in https://docs.kucoin.com/#get-trade-histories, I deduced that to access OHLC data (for instance BTC versus USDT, ...

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