Documentation Index
Fetch the complete documentation index at: https://second.tech/docs/llms.txt
Use this file to discover all available pages before exploring further.
Mobile wallets
Noah
A full-stack mobile Ark wallet, pairing a React Native app with its own Rust backend for account flows and Lightning integration.
Arké
A design-led native iOS wallet that brings bitcoin.design’s open-source UX to life, and forges new ground for Ark-native patterns.
Cypher Box
A three-tier wallet that scales with you: Lightning Accounts on Coinos and Strike, hot self-custody, and air-gapped cold storage.
Satsigner
A Sparrow-style mobile signer with visual UTXO control, full multisig PSBT workflows, and Nostr-based label sync across devices.
API and CLI
Bark
The reference Rust implementation of the Ark protocol. Includes a CLI wallet, and the engine inside Barkd and every Bark SDK.
Barkd
Bark as a long-lived daemon, exposing a REST API for backend services and integrations.
Payment processing
BTCPay Server plugin
Add self-custodial Lightning payments to your BTCPay checkout without running a Lightning node or managing channel liquidity.
ArkAPI
A pay-per-call API gateway for AI agents. Sats-metered sessions over Ark or Lightning, with no signup or API keys.
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