Lightning Labs has released an alpha version of Wavelength, a toolkit that lets developers and AI agents integrate self-custodial Bitcoin payments into apps via a simple non-custodial API without running nodes or managing liquidity.

The release emphasizes easy integration, user control over funds, and the potential for autonomous agents to transact on Bitcoin through Lightning.

Wavelength enables instant, high-volume, low-fee transactions for both humans and AI agents with self-custody by default and straightforward integration.

Industry context shows growing interest in agentic payments, with Ripple’s support for the x402 Foundation among others highlighting rising institutional engagement.

This launch sits within a broader move toward agent-native money and real-time microtransactions for APIs, data, compute, and services using blockchain tech.

Closed alpha pricing includes a minimal 1 basis point Lightning service fee plus standard routing and on-chain fees, with the possibility of future adjustments.

Pricing in the closed alpha features a 1 basis point Lightning service fee and typical routing, while on-chain fees remain the network charges.

The API is exposed to AI agents as typed tool calls via the Model Context Protocol, allowing agents to hold balances and pay for API calls or services in fractions of a cent, with wallet data protections.

Documentation, sample code, and an open-source SDK are available, with notes that the article reflects the author’s opinion and is not investment advice.

L402 protocol enables machine-native authentication and per-request Lightning payments; supported actions include wallet creation, balance checks, payments, and withdrawals.

Initial focus on Bitcoin with plans to support stablecoins via Taproot Assets, and to extend the same API to asset issuance and transactions on Lightning later.

All off-chain payments use standard BOLT 11 invoices to ensure interoperability with the existing Lightning Network from first integration.