That’s a good question. Or is this marketing for Nomics? Client library in your programming language.
Documentation Structure
Returns balance and unconfirmed amount Amount waiting 2 confirmations of multiple addresses. Balance units are in satoshis. Returns transaction history of multiple bitcoin addresses considering them part of the same wallet. For each transaction following paramters are returned: unix timestamptxidnet value transacted from wallet in satoshis and subset of address involved in transaction. Transactions are sorted by latest time and a limit of tx are returned. Pending free bitcoin api key having less than 2 confirmations are returned in pending dict with status.
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BlockCypher’s API provides a superset of the endpoints you’d find in reference implementations, in addition to some special features that make BlockCypher uniquely powerful, like our unconfirmed transaction Confidence Factor , dependable WebHook or WebSockets-based Events , On-Chain Microtransactions , and Payment Forwarding. Consequently, if you’re familiar with a blockchain’s reference implementation, you’ll feel at home using BlockCypher, but without worrying about scaling or implementation challenges. And if you’re not familiarwith the reference implementations or blockchains in generalBlockCypher’s API is a great way to dip your toes into blockchain development, without a lengthy setup process. In either case, BlockCypher has In these docs you’ll find everything you need to leverage BlockCypher for your applications. We’re working on supporting more languages, but if you’re working on your own language library, definitely let us know: we’d love to add more community supported libraries here.
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BlockCypher’s API provides a superset of the endpoints you’d find in reference implementations, in addition to some special features that make BlockCypher uniquely powerful, like our unconfirmed transaction Confidence Factordependable WebHook or WebSockets-based EventsOn-Chain Microtransactionsand Payment Forwarding.
Consequently, if you’re familiar with a blockchain’s reference implementation, you’ll feel at home using BlockCypher, but without worrying about scaling or implementation challenges. And if you’re not familiarwith the reference implementations or blockchains in generalBlockCypher’s API is a great way to dip your toes into blockchain development, without a lengthy setup process.
In either case, BlockCypher has In these docs you’ll find everything you need to leverage BlockCypher for your applications.
We’re working on supporting more languages, but if you’re working on your own language library, definitely let us know: we’d love to add more community supported libraries.
We know many learn more from code examples than specific reference documentation, which is why we have code samples in our official languages. In addition, we have a number of in-browser code examples for particular use cases, which you can see here:. Our documentation is powered by GitHub Pages and Slatewhich makes viewing changes as simple as checking the git commit history.
If there’s an error or you’d like to suggest a change, please consider submitting a pull request to benefit the broader BlockCypher community. We will never introduce any breaking changes within v1, but we may add new, non-breaking features from time to time. If you’re using these languages, we strongly encourage you to use an official SDK.
As such, BlockCypher cannot guarantee that it’s fully up to date, but we hope it will provide a nice jumping-off point for developers using this language. We’ll endeavor to keep this list updated, if any of these prove obsolete. If there’s enough support for a particular language, we’ll work with the community to turn it into an officially supported SDK. Currently, there’s only one version of the API v1. Thus, here’s an exhaustive list of blockchains and their corresponding resources:.
We want everyone to try BlockCypher with as little friction as possible, which is why you don’t need a token for any read-only GET calls. Once you have your token, you can append it to all your requests like any other URL parameter if you’re using cURL, or through the appropriate method in the language SDK you’re using. The hourly rate limits reset on the top of the hour UTC.
For example, if you’re under the free tier, and you have used regular requests by UTC, you’ll hit a rate limit until it resets at UTC.
To request higher limits or SLAs beyond what’s offered on the accounts page, please email us. Keep in mind the X-Ratelimit-Remaining attribute corresponds to the hourly rate limit associated with the endpoint you call e. All endpoints that can retrieve a single Object can be batched to return multiple objects. If you’re cURLing the API directly, batching simply requires appending each identifier to the previous one using a semicolon check the code pane for an example.
The results are aggregated in a JSON array. The other supported client SDKs batch differently, but each idiomatic to their respective language check the code pane examples in each library. We offer two different options for testing your blockchain application: Bitcoin Testnet3, and BlockCypher’s Test Chain. In case you missed the Resources sectionthe BlockCypher Test Chain is accessible from this resource:. To help facilitate automated testing in your applications, a faucet endpoint is available on both BlockCypher’s Test Chain and Bitcoin Testnet3.
Calling the faucet endpoint, along with passing a valid address, will automatically createand propagatea new transaction funding the address with the amount you provide. This example shows how to leverage the faucet to programmatically fund addresses, to test your applications. While the example used BlockCypher’s Test Chain, the same example could have used Bitcoin Testnet3 and worked the exact same way.
Some of you might be more interested in the endpoints themselves, in which case, feel free to skip to the next section. But for others, a section dedicated to all of BlockCypher’s Objects might prove a useful overview, especially if you’re new to Blockchain development in general.
And in either case, this section provides a comprehensive reference for Objects in the API. For each Object there’s a description and a link to a germane API endpoint. Typically returned from the Chain API endpoint.
A Block represents the current state of a particular block from a Blockchain. Typically returned from the Block Hash and Block Height endpoints. A TX represents the current state of a particular transaction from either a Block within a Blockchainor an unconfirmed transaction that has yet to be included free bitcoin api key a Block. Typically returned from the Unconfirmed Transactions and Transaction Hash endpoints. A TXInput represents an input consumed within a transaction.
Typically found within an array in a TX. A TXOutput represents an output created by a transaction. A TXConfidence represents information about the confidence that an unconfirmed transaction will make it into the next block. Typically used as a return object from the Transaction Confidence Endpoint. A TXRef object represents summarized free bitcoin api key about a transaction input or output. Typically found in an array within an Address object, which is usually returned from the standard Address Endpoint.
A NullData Object is used exclusively by our Data Endpoint to embed small pieces of data on the blockchain. If your data is over 40 bytes, it cannot be embedded into the blockchain and will return an error. A MicroTX represents a streamlinedand typically much lower valuemicrotransaction, one which BlockCypher can sign for you if you send your private key. MicroTXs can also be signed on the client-side without ever sending your private key. You’ll find these objects used in the Microtransaction API.
An Address represents a public address on a blockchain, and contains information about the state of balances and transactions related to this address. An AddressKeychain represents an associated collection of public and private keys alongside their respective public address. Generally returned and used with the Generate Address Endpoint.
A Wallet contains a list of addresses associated by its name and the user’s token. It can be used interchangeably with all the Address API endpoints, and in many places that require addresses, like when Creating Transactions.
The name of a wallet must be characters long and cannot start with any characters that start an address for the currency contained in the wallet. For example, bitcoin wallet names cannot start with ‘1’ or ‘3’. An HDWallet contains addresses derived from a single seed. Like normal wallets, it can be used interchangeably with all the Address API endpoints, and in many places that require addresses, like when Creating Transactions. It also contains the hex-encoded public key when returned from the Derive Address in Wallet endpoint.
A PaymentForward object represents a request set up through the Payment Forwarding service. A JobArgs represents the query parameters of a particular analytics job, used when Creating an Analytics Job and returned within a Job. Note that the required and optional arguments can change depending on the engine you’re using; for more specifics check the Analytics Engine and Parameters section. Note that the results field will depend largely on the engine used. If you’re new to blockchains, you can think of the blockchain itself as an immutable, distributed ledger.
Each block in the blockchain is like a «page» in the ledger containing information about transactions between parties. A great place to start understanding the mechanics behind blockchains is the original Bitcoin whitepaper. General information about a blockchain is available by GET-ing the base resource. For more detailed information about the data returned, check the Blockchain object. The returned object contains information about the block, including its height, the total amount of satoshis transacted within it, the number of transactions in it, transaction hashes listed in the canonical order in which they appear in the block, and.
For more detail on the data returned, check the Block object. You can also query for information on a block using its height, using the same resource but with a different variable type.
As above, the returned object contains information about the block, including its hash, the total amount of satoshis transacted within it, the number of transactions in it, transaction hashes listed in the canonical order in which they appear in the block, and. If you’re curious about the adoption of upgrade features on a blockchain, you can use this endpoint to get some information about its state on the network. If you’re new to blockchains, you can think of public addresses as similar to bank account numbers in a traditional ledger.
The biggest differences:. The Address Balance Endpoint is the simplestand fastestmethod to get a subset of information on a public address. The returned object contains information about the address, including its balance in satoshis and the number of transactions associated with it.
The endpoint omits any detailed transaction information, but if that isn’t required by your application, then it’s the fastest and preferred way to get public address information.
The default Address Endpoint strikes a balance between speed of response and data on Addresses. It returns more information about an address’ transactions than the Address Balance Endpoint but doesn’t return full transaction information like the Address Full Endpoint.
The Address Full Endpoint returns all information available about a particular address, including an array of complete transactions instead of just transaction inputs and outputs.
Unfortunately, because of the amount of data returned, it is the slowest of the address endpoints, but it returns the most detailed data record.
The returned object contains information about the address, including its balance in satoshis, the number of transactions associated with it, and the corresponding full transaction records in descending order by block heightand if multiple transactions associated with this address exist within the same block, by descending block index position in block.
The Generate Address endpoint allows you to generate private-public key-pairs along with an associated public address. No information is required with this POST request. The returned object contains a private key in hex-encoded and wif-encoded format, a public key, and a public address. The Generate Multisig Address Endpoint is a convenience method to help you generate multisig addresses from multiple public keys. After supplying a partially filled-out AddressKeychain object including only an array of hex-encoded public keys and the script typethe returned object includes the computed public address.
The Wallet API allows you to group multiple addresses under a single. It only holds public address information and never requires any private keys.
A normal Wallet can be created, deleted, and have addresses added and removed. The Wallet itself can have any custom name as long as it does not start with the standard address prefix 1 or 3 for Bitcoin.
We also offer support for HD Wallets, which make it easy to manage multiple addresses under a single. All HD wallet addresses are derived from a single seed.
API Versions
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