Documentation Index
Fetch the complete documentation index at: https://docs.moralis.com/llms.txt
Use this file to discover all available pages before exploring further.
What is JSON-RPC?
JSON-RPC is a lightweight, remote procedure call (RPC) protocol that uses JSON to encode messages. It enables applications to invoke methods on remote systems as if they were local.
Key Characteristics
- Protocol-Agnostic - Works over HTTP, WebSocket, and other transports
- Stateless - Each request is independent
- Lightweight - JSON formatting minimizes overhead while remaining human-readable
Request Structure
A JSON-RPC request contains:
| Field | Description |
|---|
jsonrpc | Protocol version (always “2.0”) |
method | Name of the method to call |
params | Method parameters (array or object) |
id | Unique request identifier |
Example Request
{
"jsonrpc": "2.0",
"method": "eth_getBalance",
"params": ["0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045", "latest"],
"id": 1
}
Response Structure
| Field | Description |
|---|
jsonrpc | Protocol version |
result | Method result (if successful) |
error | Error object (if failed) |
id | Matching request identifier |
Example Response
{
"jsonrpc": "2.0",
"result": "0x1234567890abcdef",
"id": 1
}
Common Methods
| Method | Description |
|---|
eth_blockNumber | Get the latest block number |
eth_getBalance | Get account balance |
eth_getTransactionByHash | Get transaction details |
eth_sendRawTransaction | Submit a signed transaction |
eth_call | Execute a read-only contract call |
eth_getLogs | Get event logs |
Use Cases
- Wallets - Query balances and submit transactions
- dApps - Interact with smart contracts
- Indexers - Fetch and process blockchain data
- Trading Bots - Monitor state and execute trades
