Authentication

API Key

Generate your API key from the Dashboard. BoltTx accepts API keys in two formats — use whichever fits your workflow.

Option A — Authorization header (recommended)

Standard Bearer token. Keeps your key out of URLs and server logs.

Authorization: Bearer btx_live_your_api_key_here

Option B — URL query parameter

Append ?api-key= to any endpoint. This is the only way for Solana RPC clients that accept a plain URL (e.g. new Connection(url)).

https://bolttx.io/v1/send?api-key=btx_live_your_api_key_here

Tip Addresses

Each transaction must include a SOL transfer instruction to any one of the following tip addresses. We recommend picking a random address per transaction for optimal load distribution.

Minimum Tip Amounts

Adding a Tip Instruction

Add a standard SOL transfer instruction to your transaction before signing. The tip can be placed at any position in your instruction list.

import { SystemProgram, PublicKey } from "@solana/web3.js";

// Pick a random tip address
const tipAddresses = [
  "BoLt1A77XnXgmLPTWFXztQ9oZRrTPuQHV7cChFCt35g6",
  "BoLt2zHYz1VoNbw2hoKZGaJcEXe2aNGP8EweZx1Z48wr",
  // ... add all 9 addresses
];
const tipAddress = tipAddresses[Math.floor(Math.random() * tipAddresses.length)];

// Add tip instruction (0.0008 SOL = 800,000 lamports for Starter plan)
transaction.add(
  SystemProgram.transfer({
    fromPubkey: yourWallet.publicKey,
    toPubkey: new PublicKey(tipAddress),
    lamports: 800_000, // 0.0008 SOL
  })
);