Sign Service makes Bitcoin signing as simple as calling a REST API! 🚀 We provide a HTTP API that covers the complete flow from key derivation to PSBT signing: 🔑 Key Derivation → Outputs addresses in Descriptor format, strong compatibility & high extensibility ✍️ PSBT Signing → Returns the full transaction hex + transaction ID (txid), ready to be broadcast directly to the network Supports mainnet / testnet4 networks Typical use cases: · Custodial / semi-custodial signing services · Backend setups where transaction building and signing are separated · Multi-account key management This not only accelerates project iteration and reduces the risk of errors, but also ensures system stability and security. Developers and teams are very welcome to try it out and share feedback! Project Address: github.com/bihelix-io/sign-ser...… twitter.com/BiHelix_/status/20...