M
API Matrix

Nownodes API

Blockchain / API Key Intermediate HTTPS
Varies by plan (check documentation)
72 Score
Grade B
Visit Official Site Compare Alternatives

Overview

NOWNodes provides hosted blockchain node access for 50+ cryptocurrencies via a simple API key — no need to run your own full node for Bitcoin, Ethereum, or other chains. It's a blockchain-as-a-service for developers needing direct RPC access.

💡

Beginner Tip

Use NOWNodes when you need raw RPC calls (e.g. getblockcount, eth_getBalance) to blockchains without syncing a node yourself — it proxies standard JSON-RPC so most client libraries work out of the box.

Available Data

Nownodes data via REST API
JSON-formatted response data
Requires API key authentication

Example Response

JSON Response 
{
  "status": "success",
  "data": {
    "result": "Data from Nownodes",
    "description": "Blockchain-as-a-service solution that provides high-quality connection via API",
    "timestamp": "2025-01-15T10:00:00Z"
  }
}

Field Reference

id Echo of the request ID you sent; useful for matching async responses to requests.
result The RPC method's return value — an integer for getblockcount, an object for getblock, etc.
error Null on success; contains code and message fields if the RPC call failed.

Implementation Example 

const url = "https://nownodes.io/";
// Replace headers or query params with the values required by this API.
const response = await fetch(url, {
  headers: {
  "X-API-Key": "YOUR_API_KEY"
  }
});
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data);

What Can You Build?

Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.

Common Errors & Troubleshooting

403 Forbidden / authentication error API key not included or included incorrectly
✓ Pass your API key as a query parameter: ?api_key=YOUR_KEY appended to the node endpoint URL, or in the request body for JSON-RPC calls.
Method not supported Calling an RPC method that NOWNodes doesn't expose for that chain
✓ Check the NOWNodes documentation for each chain's supported methods; some advanced or write methods may be restricted.
Incorrect node URL for chain Using the Ethereum endpoint URL for a Bitcoin call, or vice versa
✓ Each blockchain has its own subdomain (e.g. btc.nownodes.io for Bitcoin, eth.nownodes.io for Ethereum) — use the correct one per chain.

Matrix Score Breakdown

🌐 Reachability 30/30
⚡ Speed 5/20
🔒 Security 15/15
🛠 Developer XP 12/20
✓ Reliability 10/15

Partially tested on Apr 5, 2026

Technical Specifications

Auth API Key
HTTPS REQUIRED
CORS UNKNOWN
Category Blockchain
Difficulty Intermediate
Verified: 2026-04-04

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