Self-hostable Bitcoin fee intelligence API with optional MCP and x402 integrations. Former public hosting is paused.
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Caustic Elixir Cryptocurrency Library (Bitcoin, Ethereum, etc.) with extensive cryptography and number theory library
A simple, self-custodial solution for accepting private, on-chain Bitcoin payments using XPUBs and serverless functions.
A secure, client-side tool to broadcast a signed Bitcoin (BTC) transaction from an air-gapped wallet. Fetch UTXOs, regenerate QR codes, and submit raw hex transactions safely.
- air-gapped
- airgap
- bitcoin
- btc
Any API becomes a Lightning toll booth in one line. L402 middleware for Express, Hono, Deno, Bun, and Workers.