RPC Nodes APIs
RPC node APIs give you hosted JSON-RPC endpoints, so you can call a chain without running your own node. Infura covers Ethereum mainnet and testnets, while GetBlock, NOWNodes and SwiftNodes span 75 to 130+ chains under one key; NOWNodes also offers free public RPC and gRPC. Solana JSON RPC and Steem are free, single-chain public endpoints.
| API | Pricing | Auth | Format | Free tier | Status |
|---|---|---|---|---|---|
GetBlockJSON-RPC node access to 130+ blockchains (Ethereum, Bitcoin, Solana, and more) for on-chain data. Crypto › Blockchain Data & Nodes | Freemium | API key | JSON | 10k+/day | Live |
INFURA EthereumHosted Ethereum node access (mainnet and testnets) via JSON-RPC, over HTTPS or WebSocket. Crypto › Blockchain Data & Nodes | Freemium | API key | JSON | — | Untested |
NOWNodesBlockchain node access (JSON-RPC, WebSocket, gRPC, Blockbook) on 120+ networks, with free public RPC. Crypto › Blockchain Data & Nodes | Freemium | API key | JSON | 1k–10k/day | Untested |
Solana JSON RPCQuery Solana blockchain state, transactions and account data via JSON-RPC over the public mainnet endpoint. Crypto › Blockchain Data & Nodes | Free | None | JSON | — | Untested |
SteemJSON-RPC API for the Steem blockchain: blocks, accounts, balances and blogging/social content. Crypto › Blockchain Data & Nodes | Free | None | JSON | Unlimited | Untested |
SwiftNodesJSON-RPC and WebSocket access to 75+ blockchains (Ethereum, Solana, Bitcoin, Cosmos, etc.) via one API key. Crypto › Blockchain Data & Nodes | Freemium | API key | JSON | 1k–10k/day | Untested |
WatchDataNode access (Ethereum, Bitcoin, Tron, BSC, Polygon) plus a token price and transfer-history API. Crypto › Blockchain Data & Nodes | Freemium | API key | JSON | — | Live |
GetBlockFreemiumLive
JSON-RPC node access to 130+ blockchains (Ethereum, Bitcoin, Solana, and more) for on-chain data.
API key · JSON
10k+/day
llms.txt
INFURA EthereumFreemiumUntested
Hosted Ethereum node access (mainnet and testnets) via JSON-RPC, over HTTPS or WebSocket.
API key · JSON
—
no machine-readable spec
NOWNodesFreemiumUntested
Blockchain node access (JSON-RPC, WebSocket, gRPC, Blockbook) on 120+ networks, with free public RPC.
API key · JSON
1k–10k/day
llms.txt
Solana JSON RPCFreeUntested
Query Solana blockchain state, transactions and account data via JSON-RPC over the public mainnet endpoint.
None · JSON
—
llms.txt
SteemFreeUntested
JSON-RPC API for the Steem blockchain: blocks, accounts, balances and blogging/social content.
None · JSON
Unlimited
no machine-readable spec
SwiftNodesFreemiumUntested
JSON-RPC and WebSocket access to 75+ blockchains (Ethereum, Solana, Bitcoin, Cosmos, etc.) via one API key.
API key · JSON
1k–10k/day
llms.txt
WatchDataFreemiumLive
Node access (Ethereum, Bitcoin, Tron, BSC, Polygon) plus a token price and transfer-history API.
API key · JSON
—
llms.txt
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Choosing an RPC Nodes API
Is there a free RPC Nodes API?
Yes. Solana JSON RPC and Steem are free to use, and INFURA Ethereum, GetBlock, NOWNodes, SwiftNodes and WatchData have a free tier alongside paid plans.
Which RPC Nodes APIs work without an API key?
Solana JSON RPC and Steem need no key or sign-up, so you can try them with a plain request.
Can I use RPC Nodes APIs in a commercial project?
INFURA Ethereum, GetBlock, SwiftNodes and WatchData permit commercial use.
Broader: Blockchain Data & Nodes APIs · Crypto APIs
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