> ## Documentation Index
> Fetch the complete documentation index at: https://docs.theblockchainlibrary.com/llms.txt
> Use this file to discover all available pages before exploring further.

# JSON-RPC

> A lightweight remote-procedure-call protocol using JSON messages and widely used by blockchain nodes and wallets.

# JSON-RPC

A lightweight remote-procedure-call protocol using JSON messages and widely used by blockchain nodes and wallets.

## Definition

A lightweight remote-procedure-call protocol using JSON messages and widely used by blockchain nodes and wallets.

## Why it matters

Developer tooling connects applications and software to blockchain nodes, data, and smart contracts.

## Related knowledge

* [Blockchain](/categories/blockchain) — term
* [Cryptography](/categories/cryptography) — term
* [Web3](/categories/web3) — term

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**Canonical knowledge ID:** `glossary:json-rpc`