Quick Start

2.1 Get your API Key

To access the 0Block API, you’ll need an API Key. Get your API Key

All API requests require the following header:

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2.2 Tip Requirement

Every transaction submitted to 0Block must include a minimum tip of 0.001 SOL sent to one of the following official 0Block tip accounts:

7ryAvKtymdDdnSqE6g8ctS7sMcmxDCZbzXoRDWSLzero
6646q6HMnzAE7BUhsWma86SebPm2VC9bW9tsDJsDzero
2ZH2unJ7NaCu3kiXaiJPDwjSjDNudFgqhMetSDJGzero
9yXPwviBkVAEWGEbCVkYhzyN7fsrybfDSYv7SeTXzero
4LFeE3G7eJDHoStjPrga6MyJdbrMG924MAyLTp3Rzero
GHjaNw8Sd8ArWZt2UqoH2rGYtzt2MspUmxcAshFkzero
MbCZkyVkpADL3kqWPf94bWXNgzwNeyjUqUXBZn5zero
AYXWDKX1wWwS6Rcydx2Z6QjS1SZhW69z2pxoEpuRzero
8kR3r5aaenaauC1qFcBVwAtMAP9GAANthrsLToe3zero
24wwbjb4vXDpfGHhH61JsPkRQzSnCFWUeiuQpXkZzero

Example

Include a transfer instruction in your transaction (preferably as the first instruction):

transaction.addInstruction(
    SystemProgram.transfer(
        fromPublicKey,
        '7ryAvKtymdDdnSqE6g8ctS7sMcmxDCZbzXoRDWSLzero',
        1_000_000 // 0.001 SOL
    )
);

Transactions without a valid tip will be rejected.

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2.3 API Endpoints

You can connect to any of the following regional 0Block endpoints based on proximity and latency:

Region	Endpoint
🇺🇸 North America (East)	https://nyc.0block.io
🇺🇸 North America (Central)	https://chi.0block.io
🇺🇸 North America (West)	https://las.0block.io
🇳🇱 Netherlands	https://ams.0block.io
🇬🇧 United Kingdom	https://lon.0block.io
🇩🇪 Germany	https://fra.0block.io
🇸🇬 Singapore	https://sin.0block.io
🇦🇺 Australia	https://syd.0block.io

All endpoints expose the same API routes and automatically route to the nearest available Solana RPC cluster.

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2.4 Send Your First Transaction

Use curl or your preferred HTTP client to submit a base64-encoded Solana transaction.

curl -X POST 'https://nyc.0block.io/?api_key=<YOUR_API_KEY>' \
  -H "Content-Type: application/json" \
  -d '{
      "jsonrpc": "2.0",
      "id": 1,
      "method": "sendTransaction",
      "params": [
        "BASED64_ENCODED_TRANSACTION",
        { 
          "encoding": "base64", 
          "skipPreflight": true 
        }
      }'