Bitcoin paymaster infrastructure.
Let your users put data on-chain for free. Unlock seamless onboarding, product trials, and dApps. Built for developers and agents.
No credit card required
Droplit is a hosted BSV wallet. Agents can sign up, create a droplit, and deposit via paymail without a browser UI. Agent signup and deposit guide.
How it works
Three steps from zero to sponsored transactions.
Build your transaction
Construct outputs with your business logic — identity records, token transfers, data attestations. Sign what matters.
POST to /fund
Send the transaction template to Droplit. We add funding inputs, sign them, and broadcast to the network.
User never pays
Your users interact with your app. Droplit absorbs the sub-cent on-chain cost. No wallet setup, no coin purchase.
/faucet/:name/fund
One endpoint.
Your app builds the transaction. Droplit adds funding inputs, signs them, and broadcasts. No bundlers, no relay infrastructure, no fee estimation.
// Fund a transaction — your app signs, Droplit pays
const client = new AuthFetch(new ProtoWallet(signerKey));
const tx = new Transaction();
tx.addOutput({
lockingScript: LockingScript.fromHex(signedScript),
satoshis: 0,
});
const res = await client.fetch(`${API}/faucet/${name}/fund`, {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({ rawtx: tx.toHex() }),
});
const { txid } = await res.json();Built for the stack you need
Sponsored wallets, signed API access, on-chain data, and agent automation in one platform.
Single-Call Funding
Zero-Friction Onboarding
Built for Autonomous Agents
Sub-Cent On-Chain Data
BRC-103/104 Mutual Auth
Self-Hosted or Managed
On other chains, on-chain data costs dollars.
On BSV, it costs fractions of a cent.
ERC-4337 paymasters require bundlers, EntryPoint contracts, and complex relay infrastructure. Droplit is one API call where publishing data on-chain costs under a penny.
$0.50–$50
other chains per tx
<$0.01
BSV via Droplit
Pricing
Included with your Sigma Identity plan.
Starter
500
ops/month
1 wallet included
Pro
10K
ops/month
5 wallets · $49/mo
Scale
100K
ops/month
Unlimited wallets · $149/mo
FAQ
Start sponsoring transactions.
Create a droplit, fund it with BSV, and start building in minutes.