We're excited to announce the alpha release of Wavelength, a toolkit for adding self-custodial bitcoin (and stablecoin) payments to any application, designed to create the best developer experience for humans and agents. The Lightning Network gives the world instant, global, low-fee payments where every user controls their own funds, but using it previously meant running infrastructure most builders didn't want to integrate, manage, or maintain. Wavelength exists to close that gap. It takes everything hard about integrating bitcoin and turns it into a few simple API calls, so any developer, vibe coder, or agent can give their app a working bitcoin wallet without learning how Lightning works under the hood. Wavelength is open to everyone today on signet and testnet with mainnet access available by invite.

Payments on the open internet should be as easy to add as a card-processing API, but instant, global, and fully under the user's control, without demanding all sorts of personal data just to move a few dollars. The goal of Wavelength is to make Lightning that simple, and to bring it from the developers who already love it to a much larger group who simply want payments that work. It starts with bitcoin, and stablecoins are on the way, so the same simple surface will move both. This is an early release, but the aim is a payments toolkit so easy that building with bitcoin stops being a specialist's job and becomes something any developer, vibe coder, or agent can do in an afternoon.

We envision a world where bitcoin and stablecoin payments permeate through a wide variety of applications, services, and tools. Imagine an AI agent can easily autonomously pay for things whether that’s an API call, a data feed, or another agent's service, in fractions of a cent, with no card and no account. A subscription app can charge a few cents a month instead of a flat monthly minimum. A marketplace can settle between buyers and sellers in seconds rather than days.

...read more at lightning.engineering