Monetize your API for
AI agents.

Watch an agent buy from this API.

Click the button. An autonomous agent on our server hits a paid endpoint, gets a 402 with a Lightning invoice, pays it from a pre-funded wallet, and retries with proof of payment — all in under two seconds. This is exactly what your customers' agents will do against your API once you integrate.

Sell with your agent.

Every step of the producer side is an MCP tool call, so your agent can stand up the selling side on its own. You supply a funded Lightning wallet, a spend ceiling, the API, and the price. Nothing else needs a human in the payment plumbing.

# What you say
Set me up to sell my API over Lightning at 5 sats per call.

• 1 · It opens the account. The agent calls create_lightning_enable_account, pays a ~100-sat L402 challenge from your wallet, and gets a merchant API key with a 30-day Agentic Commerce trial. No card, no checkout page.
• 2 · It connects your wallet to receive. l402_producer action configure_receive points Lightning Enable at your own wallet over Nostr Wallet Connect. No Strike or OpenNode account to open — the sats arrive in the wallet you already run.
• 3 · It publishes the paid endpoint. create_proxy, add_endpoint, and publish gate your API and price each route. The proxy serves an OpenAPI 3.1 description carrying x-payment, so a buying agent reads the price before it calls.
• 4 · It gets paid, wallet to wallet. A buyer's agent hits the endpoint, gets a 402, pays the invoice, and retries with proof. The payment settles from its wallet into yours — no invoice to chase, no payout schedule.
• 5 · All of it from MCP. The l402_producer actions ship in the free, open-source MCP server, and the producer-setup Claude Skill walks an agent through the whole sequence in one go.

You keep the boundaries: which wallet it may use, how much it may spend, which API it may sell, and at what price. Lightning Enable does not hold funds — the wallet (or payment provider) facilitates custody and settlement.

Gate a route. Get paid.

The middleware is a tiny wrapper around our hosted producer API. Pick your stack, install one package, gate a route with an attribute or a config line.

// .NET 8 / ASP.NET Core minimal API
using L402Server.AspNetCore;

builder.Services.AddL402AspNetCore(opts =>
    opts.ApiKey = builder.Configuration["LightningEnable:ApiKey"]);
app.UseL402();

app.MapGet("/api/data", () => data)
    .WithMetadata(new L402Attribute { PriceSats = 100 });

// Node + Express
import { l402 } from "l402-express";

app.use("/api/premium", l402({
  apiKey: process.env.LIGHTNING_ENABLE_API_KEY,
  priceSats: 100,
}));

app.get("/api/premium/data", (req, res) => res.json(data));

Prefer to mint challenges yourself? The L402 Producer API creates and verifies challenges directly — POST /api/l402/challenges returns a Lightning invoice + macaroon for any resource, and POST /api/l402/challenges/verify checks the proof before you serve the response.

Pricing.

A flat monthly subscription, never a percentage of your revenue. Lightning Enable is middleware and does not hold funds — the wallet (or payment provider) you connect facilitates custody and settlement.

One plan. 30-day free trial.

Lightning Enable does not hold funds. The wallet (or payment provider) you connect — your own wallet over Nostr Wallet Connect, Strike, or OpenNode — facilitates custody and settlement.

Full plan details and the Free Producer Sandbox limits: lightningenable.com/pricing.

Have an agent? It can activate the same trial itself with a 100-sat Lightning payment, no card, and set up the selling side for you — see Sell with your agent. Either trial ends the same way: add billing to stay on Agentic Commerce, or the account moves to the Free Producer Sandbox (3 endpoints, 200 challenges/mo, 1,000 sats max per challenge, no card, does not expire). Just want to poke at it first? Start in the Free Producer Sandbox.