Polkadot
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Polkadot API is available on Web3 API platform.
Polkadot is the first fully-sharded blockchain.
Polkadot enables scalability by allowing specialized blockchains to communicate with each other in a secure, trust-free environment.
Polkadot is built to connect and secure unique blockchains, whether they be public, permissionless networks, private consortium chains, or other Web3 technologies. It enables an internet where independent blockchains can exchange information under common security guarantees.
In order for your Web3 application to interact with Polkadot — either by reading blockchain data or sending transactions to the network — it must connect to a Polkadot node. Developers interact with the blockchain using the methods provided by the API.
The API interaction follows the JSON-RPC which is a stateless, light-weight remote procedure call (RPC) protocol. It defines several data structures and the rules around their processing. It is transport agnostic in that the concepts can be used within the same process, over sockets, over HTTP, or in other message-passing environments. It uses JSON (RFC 4627) as data format.