# Json-RPC

노드를 설치하지 않고도 RPC 서버를 통해서 블록체인 정보를 읽고 트랜잭션을 보낼 수 있습니다. RPC 서버는 점검 혹은 장애가 발생하지 않는 경우 상시 운영됩니다.

* 메타디움 API를 이용하기 위한 스펙은 [Ethereum API](https://github.com/ethereum/execution-apis) 스펙과 동일합니다.
* 메타디움은 공개된 End Node에 Json-RPC 사양을 구현하여, dApp이 직접 온체인을 사용할 수 있는 메소드 집합을 제공합니다. 또한 [Ethereum Json-RPC API](https://ethereum.org/en/developers/docs/apis/json-rpc/)와 동일한 Json(RFC 4627) 표준데이터 형식을제공합니다. 

<table><thead><tr><th width="152">네트워크</th><th>유형</th><th>주소</th></tr></thead><tbody><tr><td>Mainnet</td><td>HTTP(HTTPS) server endpoint</td><td>https://api.metadium.com/prod</td></tr><tr><td>Mainnet</td><td>WS(WSS) server endpoint</td><td>wss://ws.metadium.com/prod</td></tr><tr><td>Testnet</td><td>HTTP(HTTPS) server endpoint</td><td>https://api.metadium.com/dev</td></tr><tr><td>Testnet</td><td>WS(WSS) server endpoint</td><td>wss://ws.metadium.com/dev</td></tr></tbody></table>


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