Questions tagged [api]
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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How do I use walletnotify?
I have bitcoin daemon and I want to use the walletnotify option with a json-rpc call. Some of the examples use a "transaction.sh" file for walletnotify. What is it for?
What do I have to write in ...
- 501
36
votes
6
answers
48k
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How to get an address's balance with the bitcoin client?
I want to see the balance of some address using bitcoind.
I set txindex=1 and did a -reindex to get all transactions indexed.
But still, there doesn't seem to be a way to get balances of an address. ...
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vote
3
answers
889
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How to retrieve total BTC held in Ledger wallet
I'm new to Ledger.
As a software engineer, I'd like to write my own app (for my own personal use) that is sort of like a more basic version of Ledger Live.
I want to show my balances on my own private ...
- 143
8
votes
3
answers
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Checking/polling a balance of an address in Electrum via the command line/RPC
Suppose, I've dynamically -- via the command line/RPC -- created an address or payment_query in Electrum. And saved its details in a database along with the amount of bitcoins I expect to receive.
...
- 81
7
votes
2
answers
2k
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How to get the Input Address from vin where only a txid is given (Insight-Api)
I like to find the Input Address and Amount for a vin like this:
"vin": [
{
"txid": "e3f0e88ce224d342a0189c1b9d2fd488d8bda2f303dbe1e1dbbaa5f51d9f4a53",
"vout": 1,
"...
- 113
5
votes
1
answer
3k
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Monitor all transactions on bitcoin network - API
I am searching for a solution to monitor all bitcoin transactions (or for first ties at least for addresses inside my bitcoin client).
I found http://blockchain.info/api_websocket is this really ...
- 153
17
votes
14
answers
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What are the most comprehensive APIs for cryptocurrency market data?
I'm looking for a well documented, easy to use API that provides data on the majority of cryptocurrencies. That data should include the 1 hr, 24hr, and 7 day price changes, as well as the entire ...
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8
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5
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Is there a remote, trustless bitcoin API that doesn't require anything (blockchain/SPV headers) to be stored locally?
This question asks about how to work with bitcoin via an API without requiring a local blockchain. The only answer is about blockchain.info's JSON API, but it appears that unlike the web version of ...
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7
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3
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2k
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How to know when a payment has been received by bitcoind?
I want to create a website which involves the creation of a new single-use address that a user would send bitcoins to. I'd like to know programmatically when the user has sent bitcoins to the address ...
- 205
7
votes
2
answers
3k
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Calculating address balance
Is there some method how you can calculate the balance of an address without resorting to web-based API's? When I import a private key the rescanning of bitcoind takes hours. I know to get a balance ...
- 1,967
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5
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Bitcoin's real-time Buy and Sell price API
What is the API to get Bitcoin's real-time Buy price and sell price on my site? and how can get it from to implement in my website developed in PHP.
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votes
2
answers
911
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Accepting Bitcoin payments without the full blockchain or third party APIs?
I want to make a basic program/script that utilizes Bitcoin payments, but I don't have the storage space to sync with the entire blockchain, and I don't want to be dependent on a third-party API like ...
user45779
2
votes
3
answers
1k
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accept bitcoin payments for orders without 3rd party software
I've been searching for an open-source alternative to blockchain.info's Receive Payments API (https://blockchain.info/api/api_receive). I want to run bitcoind on my own server and have payments ...
- 1,132
2
votes
2
answers
1k
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How trade engine works? [closed]
How cryptocoin trade engine works? Is there any open source project available other than buttercoin. I want to build a simple trade engine in ruby on rails for cryptocoins. what are the essential ...
- 338
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vote
1
answer
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where to get cryptocoins data
i want to create an API. where do Crypto Currency exchanges get their data from, Like the exchange rate, difficulty of coins, blocks and rewards.
I want to create a website which displays all the ...
- 151
0
votes
6
answers
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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?
- 11k
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5
answers
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How to build a bitcoin trading bot
I'd like to experiment with bitcoin technology, crypto currency, and encryption. I thought the best way to accomplish that is building my very own bitcoin trading bot.
It seems like a daunting task, ...
- 201
18
votes
4
answers
43k
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Anyone know of an API I can get historical price time series for multiple coins
I'd like to build some historical price charts, to use in my cryptocoin portfolio tracking app, using time series data (with HighCharts js).
Anyone know of an API that provides this price data, ...
- 461
11
votes
6
answers
6k
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Are there any C# wrappers for the Bitcoin REST API?
Are there any C# wappers that take an OOO approach to the Bitcoin REST API, and encapsulate it in an easy to use format?
- 12.7k
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3
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How to estimate optimal fees for transaction in bitcoind?
As I understand, with the network congestion it's sometimes advisable to set a higher fee to process a transaction within a block or two. Is there some way to estimate the optimal fee through calls to ...
- 43k
10
votes
3
answers
18k
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Bittrex API rate limit
Does Bittrex have a limit on how many requests I can do? I cannot find that info in their documentation.
I only find their Announcement from 2014 which says:
Api requests will be throttled based ...
- 203
9
votes
1
answer
625
views
Importprivkey's "label" - is it the same as an account?
The "importprivkey" API call allows one to import a private key and save it with a label. Is the "label" in the API call synonymous with an account used in the wallet?
- 43k
6
votes
3
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Anyone know of an API for RSI and other indicators? [closed]
I am looking for Relative Strenght Index and other market indicators API's for cryptos. I don't think TradingView provides one but maybe you know one?
- 161
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1
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BitFinex API call returns 400 bad request
Trying to get authentication with BitFinex to work. Docs here: https://www.bitfinex.com/pages/api
Say the client wants to make a request to POST
https://api.bitfinex.com/v1/order/new
...
- 223
6
votes
1
answer
11k
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what is the Volume and BaseVolume reported from bittrex API?
For example in https://bittrex.com/api/v1.1/public/getmarketsummaries or if you subscribe to the ws feed you get sent the following type thing.
{
"MarketName": "BTC-ANS",
"High": 0.0031,
"Low": ...
- 165
6
votes
3
answers
17k
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Historical BTC data in JSON
As of now, the only API I can find that serves historical data is https://blockchain.info/charts/market-price?timespan=60days&format=json. It only uses USD, and I need to serve non-USD data. My ...
5
votes
2
answers
6k
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Bitcoin API - How can I identify new incoming payments?
Good afternoon,
I am struggling a bit to receive Bitcoin payments at my online store. So far, I have installed bitcoind in my system and created a set of receiving addresses, and now I face the ...
- 854
5
votes
1
answer
1k
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Fees for bitcoind sendmany, limits for number of end addresses
I have two questions, both about sendmany.
First, is there any limit on how much transactions can I send with sendmany? (Apart from bash's limit with maximal parameter length.) Is sending about 500 ...
- 2,685
4
votes
1
answer
2k
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What are midstate and hash1 used for in mining?
The first answer here does a good job explaining how the SHA-256 function requires more than one input (an initial one is specified by to the SHA-256 specs). As far as I understand it, the "midstate" ...
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4
votes
1
answer
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What is the difference between secp256k1_ecmult_gen and secp256k1_ecmult?
libsecp256k1 has two implementations, secp256k1_ecmult in ecmult.h and secp256k1_ecmult_gen in ecmult_gen.h, to multiply the points of an elliptic curve.
secp256k1_ecmult_gen supports simple ...
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4
votes
1
answer
3k
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JSON RPC call from webpage to Bitcoin Core
I want to make API calls to my Bitcoin Core wallet from my webpage but when I try to connect it gives me Internal Server Error
I'm using easybitcoin.php JSON from Github.
I'm trying with this JSON ...
4
votes
1
answer
2k
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Bitcoin Charts API Data
So I'm trying to learn how to work with an api, and how to get bitcoin historical price data. Ideally, I'd like all of it, and the nice gui that they have on the site for displaying the charts (but I ...
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4
votes
1
answer
537
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How do I use Bitnode API?
I just started running a full node and was wondering how to use these commands to verify my node: https://getaddr.bitnodes.io/api/
Specifically, what command line or IDE do I need to type these ...
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votes
4
answers
5k
views
How can I generate a bitcoin address?
Is there any way to generate bitcoin addresses other than the Blockchain API? (given the fact that it is not public)
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2
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Is there any useful documentation on using the MtGox API with node.js?
I have been looking for some help building a platform using node that works with the MtGox api. It seems easy to make request, but I am confused about how to pass a parameter.
Right now my code ...
- 275
3
votes
1
answer
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API for large number of queries to different addresses every few minutes
I have an application that needs to makes queries to get address balances and transaction data from Bitcoin.
What are some possible solutions to this? It would be great if I didn't have to manage a ...
- 11k
3
votes
1
answer
2k
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Callback not working in program using the blockchain api
I am trying to create automated receive Bitcoin payments via Blockchain API.
I have my API key, xpub, everything. I'm using PHP.
Here is the part of my code for generating wallet address:
$scrt = ...
- 31
3
votes
1
answer
938
views
Using bitcore to create a transaction with two addresses and change address
I'm playing around with bitcore transactions and multi-sig transactions and was wondering how to send a transaction to more than one address, and keep the change.
Currently when I try to send the ...
- 235
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votes
2
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1k
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How to get info for public address from bitcoin-cli + local db? (Can it be done without creating a wallet?)
I just started running my own full node. IBD is finished, and I'm now learning how to use bitcoin-cli.
First I would like to extract all the available information for one or more public addresses ...
- 145
2
votes
1
answer
2k
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How does one submit a transaction to the network using the blockchain.info API?
I am currently working on a project which makes use of the blockchain.info api (php). Could anybody please tell me how to use this api to submit transactions to the network?
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2
votes
1
answer
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BIP 38 Implementions for Altcoins?
Trying to identify implementations for creating BIP 38 encrypted private keys for alternative coins to spark collaborative open source discussions to standardize BIP 38 to support altcoins. Please ...
- 3,047
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What options do I have to avoid API gap limit? I am using xpub keys
I am building a app, and the design is, the "welcome page" has a qr code allowing the user to purchase a single-use of the app.
Blockchain.info conveniently allows you to use xpub to generate ...
- 223
2
votes
2
answers
2k
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What exactly is the "vout" field?
This is driving me nuts. Through trial-and-error, asking numerous people and attempting to read endless articles and manuals, I've come to the conclusion that the "transactions" listed by ...
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1
answer
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Is the `addmultisignature` API call dependent on order of public keys in the array? Or is it lexicographically sorted?
Say Alice and Bob are part of a partnership business that accepts Bitcoin. They store all their main funds in cold storage until the end of 3 months, when they cash out and use a new address. This ...
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1
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Does createrawtransction accept scriptPubKey and redeemScript as inputs?
According to the built-in RPC documentation the signature for createrawtransaction is:
createrawtransaction [{"txid":"id","vout":n},...] {"address":amount,...}.
Gavin in his example on 2-of-3 ...
- 1,366
1
vote
1
answer
4k
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Bitcoin Client API-RPC: Efficient way to list transactions from a list of addresses
In the API CallList:
https://en.bitcoin.it/wiki/Original_Bitcoin_client/API_calls_list
You can pass an address as a parameter to "listtransactions" to get the latest list of transactions from an ...
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vote
4
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5k
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Market Cap API? [closed]
I am using CryptoCompare's API and it gives me volume data, but I am wondering where I can get market cap / circulating supply data. Do any reliable API's provide this?
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0
answers
336
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Get fees for each transaction in a block without too many API calls
Using Blockchain.info's API, my current approach is to query the endpoint for a block then to collect all the transaction hashes within that block:
https://blockchain.info/rawblock/$block_hash
Then ...
- 353
1
vote
1
answer
203
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Negative volumes returned from MtGox websocket api request
I am using MtGox's websocket api to construct an order book. The trouble I'm having is that every once in a while, the depth event will return an JSON object with negative volume and negatie ...
- 3,050
0
votes
1
answer
60
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What's the point of Multi Signature Addresses?
When an attacker has access to the private key of the wallet, he can dump the private keys of every address used for the multisign address(es).
So, what's the point of multi sign addresses when there'...
- 3