Rank 1alphaL402

Lightning Labs Wavelength

Bitcoin on Easy Mode for Agents and Humans

alpha: Launched in alpha on 21 July 2026. The repository warns RPC surfaces and CLI commands may change between minor versions, and gates mainnet behind an explicit --allow-mainnet flag.

Vendor documentation Website

Rank: 1 of 14
Composite score: 9.4 / 10
Schemes: L402
Role: Pays 402 challenges; Charges with 402
Kind: wallet
Maturity: alpha
Protocol / rail: L402 / Lightning / Ark
Assets: BTC
Networks: bitcoin, lightning, ark
Custody model: Self-Custodial (Ark protocol)
Node management: Not required
MCP native: Yes
License: MIT
Last verified: 2026-10-15

Overview

Wavelength is Lightning Labs' open-source (MIT) toolkit for adding self-custodial bitcoin payments to applications and agents, launched in alpha on 21 July 2026. It combines an Ark client, a Lightning swap engine and an on-chain wallet: the holder keeps their keys and can unilaterally exit to on-chain bitcoin, with no node to run, no channels to open and no liquidity to source — routing liquidity comes from Lightning Labs' Loop. Every off-chain payment uses a standard BOLT 11 invoice, so it interoperates with the existing Lightning Network. Agents reach it through an MCP server (`wavecli mcp serve`) or a one-command skills install; developers can also use the Go SDK, the gRPC/REST API, or the browser WASM and React packages. It is the only indexed entry that scores 10 on custody, operational friction and agent support at once. The trade-off is maturity: the software is alpha, its interfaces may still change, and mainnet operation is gated.

Key advantages

No node, channel or liquidity management
Self-custodial, with unilateral exit to on-chain bitcoin at any time
Native MCP server (wavecli mcp serve) and a one-command agent skills install
Standard BOLT 11 invoices — interoperates with the existing Lightning Network
Routing liquidity inherited from Lightning Labs' Loop

Trade-offs

Alpha: RPC surfaces, on-disk schema and CLI commands may change across minor versions
Mainnet is gated — the repository requires an explicit --allow-mainnet flag, and launch coverage describes mainnet access as invitation-only
Bitcoin-denominated: no stablecoin settlement today

Evaluation matrix

Custody & Sovereignty10.0
Self-custodial with exit guarantees vs. centralized/custodial risk. A 10 means the holder keeps their own keys and can unilaterally exit to the base chain; a custodial platform scores around 4.
Operational Friction10.0
Infrastructure burden. Zero nodes, channels or liquidity to manage scores a 10; running and maintaining your own Lightning node scores around 4–5.
Agent Native Support10.0
Out-of-the-box MCP server integration, typed tool calls and LLM-friendly setup. A first-party MCP server scores 9–10; a library or CLI an agent can drive scores 6–8.
Payment Rails & Assets8.0
Breadth of settlement rails and assets: Lightning for true micropayments, stablecoins for a stable unit of account, cards for mainstream reach. A single asset on a single network scores around 7.
Settlement Speed & Fees10.0
Instant sub-second settlement with near-zero overhead scores a 10. Block-bound settlement scores around 8; card-network settlement and fees score lower.
Developer DX8.5
SDK quality, documentation, maintenance and copy-paste integration speed. Alpha-stage API churn, stale releases or inconsistent docs lower the score.

Why these scores. Custody 10: holder keys with unilateral on-chain exit. Friction 10: no node, channels or liquidity. Agent 10: native MCP server plus a skills install. Rails 8: Lightning, Ark and on-chain bitcoin; no stablecoins today. Settlement 10: instant off-chain BOLT 11. DX 8.5: MCP, Go SDK and JS packages, held back by alpha-stage API churn.

Integration

Give an agent a wallet (skills install)

npx skills add lightninglabs/wavelength-sdk

Serve the MCP server

wavecli mcp serve

Build the daemon from source

git clone https://github.com/lightninglabs/wavelength.git
cd wavelength
make install-wavewalletrpc

Browser (WASM) package

npm install @lightninglabs/wavelength-web

Best for

Agents and apps that want self-custodial bitcoin and Lightning payments without operating node infrastructure, and can accept alpha-stage software.

Sources

Every claim on this page was checked against these sources on 2026-10-15. Maturity “alpha” means: the vendor labels it alpha, or warns that its apis may change between minor versions.

Machine-readable

fetch this entry as JSON

curl "https://402mcp.org/api/v1/solutions?id=lightning-labs-wavelength&view=full"

or as Markdown

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