// GLOSSARY -- WEB3 INFRASTRUCTURE

What is RPC Node?

1 min read Updated

An RPC node is a blockchain node that exposes a Remote Procedure Call interface — allowing applications, wallets, and agents to read blockchain data and submit transactions programmatically.

WHY IT MATTERS

RPC nodes are the API layer of blockchain. Every time a wallet checks your balance, a dApp loads your positions, or an agent submits a transaction, it's communicating with an RPC node. Standard APIs (JSON-RPC for Ethereum) define how applications interact with the blockchain.

Most developers use RPC providers (Alchemy, Infura, QuickNode) rather than running their own nodes. These services handle the infrastructure complexity: syncing, scaling, redundancy, and availability.

RPC reliability directly affects application quality. Slow, unreliable, or rate-limited RPC can cause failed transactions, stale data, and poor user experience.

FREQUENTLY ASKED QUESTIONS

Should I run my own RPC node?
For most applications, using a provider (Alchemy, Infura) is simpler and more reliable. Run your own for: maximum trust minimization, high-volume applications where provider costs are significant, or regulatory requirements.
What is JSON-RPC?
The protocol standard for Ethereum node communication. Methods like eth_getBalance, eth_sendTransaction, and eth_call define how applications read state and submit transactions.
Are all RPC providers the same?
No. They differ in: supported chains, rate limits, pricing, reliability, additional features (enhanced APIs, webhooks), and geographic coverage. Evaluate based on your specific needs.

FURTHER READING

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