For builders

Build with LightChain AI

Run encrypted inference from your own app with lightnode-sdk. Non-custodial. Your wallet signs on-chain, the SDK does the rest. About 0.022 LCAI per call on mainnet, free on testnet, ECDH-P256 + AES-256-GCM end to end.

Open the playground View on npm Source on GitHub

Three ways to try it

Pick one. Browser wallet, cloud IDE, or your laptop.

In the browserno install

The live playground: connect a wallet, type a prompt, watch the decrypted answer stream. Free on testnet.

Open the playground

In a cloud IDEabout 5 sec

Runnable starter pre-installed. Fund the printed testnet address with one faucet click, hit Run, see one real inference complete.

Open in StackBlitz

On your laptopgit clone

Clone marinom2/lightnode-examples, cd quickstart-inference, npm i, npm start.

View on GitHub

Install

One package, one peer dep. Pure-JS crypto (noble), runs in Node 18+, browsers, StackBlitz, Bun, Cloudflare Workers.

npm install lightnode-sdk viem

Quickstart

One encrypted inference end to end. Real code, runs as-is.

// 5 lines, key in, answer out. Works in Node, Next.js, anywhere.
import { runInferenceWithKey } from "lightnode-sdk";

const { answer, txs } = await runInferenceWithKey({
  network: "testnet",                              // or "mainnet"
  privateKey: process.env.PRIVATE_KEY as `0x${string}`,
  prompt: "Reply with a one-sentence fun fact about the ocean.",
});

console.log(answer);                               // decrypted answer
console.log(txs.createSession, txs.submitJob);     // on-chain receipts

One command, you're integrated

Brand-new project? Use the create scaffolder. Existing project? Use add. Both detect Next.js, Hono, and Node.

create-lightnode-appabout 30 sec

npm create lightnode-app my-app

Scaffold a brand-new LightChain AI dApp. Three templates: node, nextjs-api, hono.

npm source

lightnode addin your project

npx lightnode add inference

Five subcommands: inference, chat, agent, analytics-dashboard, nft-mint-with-inference. Detects your framework. Full catalog on the CLI page.

npm source

Dive in

The rest of /build is split into four focused sub-pages. Pick one.

SDK modules

Six interactive cards. Bridge live quotes, real DAO proposals, multi-turn chat, worker preflight, dispute lookup, models. Plus the three API tiers and server-vs-user-pays patterns.

Try each module inline ->

CLI

Run lightnode commands from the browser via the interactive runner. Plus the full catalog and how to actually invoke npx without the package-name conflict.

Run a CLI command ->

Live network

Real mainnet workers + models + per-model performance, refreshed every minute. Plus the five-stage encrypted-inference protocol and live-verified mainnet+testnet receipts.

See live network data ->

Reference

All 14 read-only LightNode methods. Testnet vs mainnet. Every official contract address. Recent SDK versions. Non-custodial model. Python port. Framework examples.

Browse the reference ->