Welcome to Spark’s early builder program! We’re excited to have you test and build with us during these early stages.

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Why Build on Spark Now?

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Be Among the First

  • Shape the future of Bitcoin infrastructure
  • Get direct access to our engineering team
  • Receive early access to new features
  • Rewards and partnerships for early builders

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Technical Advantages

  • Instant and dirt cheap Bitcoin transactions
  • Self-custodial architecture
  • TypeScript SDK with developer-first design
  • Native interop with both Lightning and L1

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Looking for Creative Builders

We’re looking to reward creative builders pushing Spark forward. The more creative your contributions, the more we want to reward you. We’re building something truly important for Bitcoin and your input is invaluable.

  • Build novel implementations
  • Share your ideas for improvements
  • Give honest feedback about what works/doesn’t
  • Tell us what features you need
  • Break things (and tell us how you did)

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Example Projects You Can Build with Spark:

  • Build a Bitcoin enabled Venmo
  • Connect to UMA offramps with link.uma.me
  • Build AI agents with Spark wallets
  • Instant miner payouts with native BTC on Spark
  • Issue BTC rewards over Spark to self-custodial wallets
  • Bitcoin-based loyalty programs and games
  • Spark-powered chrome extension
  • Issue your own LRC20 tokens on Spark (coming soon)

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Beta Program Details

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Current Availability

  • TypeScript Wallet SDK
  • More languages coming based on demand

The SDK is in beta and APIs may change before production release. Only use test funds you are willing to lose during this testing period.

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Limited Test Environment

  • Testing mode only - please do not onboard real users
  • Regtest & Mainnet supported for testing
  • There will be SSP limits in place for LN and L1 payments

Ready to start? Look at the Quick Start Guides and Wallet Documentation to get you started.

Testing Guide