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Barkd is Second’s reference Bark wallet. It runs as a daemon alongside your other services and exposes a local REST API, so any backend in your stack can send and receive bitcoin over Ark, Lightning, and on-chain. Barkd is the right fit when you run infrastructure and need to manage bitcoin server-side:
  • Self-hosted node platforms (Umbrel, Start9, RaspiBlitz, etc.)
  • Webshops and e-commerce platforms accepting payments
  • Exchanges managing user deposits and withdrawals
  • Payment processors settling merchant payments
  • Backend services automating payouts, subscriptions, or reconciliation
If you’re building bitcoin apps for mobile or desktop, try the Bark SDK.

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Get started

Install

Download binaries or compile barkd from source.

Start the daemon

Run barkd with the right datadir, bind address, and CORS settings.

Authenticate

Retrieve and rotate the bearer token barkd uses to authorize REST calls.

REST API

Full reference for every barkd REST endpoint.

Clients

Typed TypeScript and C# packages that wrap the REST API.