sphere-sdk

Why we included this project

Most agent frameworks stop at tool calling; they never give the agent a way to actually hold and move money. Sphere SDK fills that gap with a TypeScript library that wires up a self-custodied identity, a BIP39/BIP32-derived wallet with optional password encryption, and peer-to-peer payment rails where transfers are certified by the network's engine rather than a central gateway. On top of that it adds agent-oriented primitives: escrowed token swaps with a negotiation protocol, an intents bulletin board with semantic search for posting and finding signed offers, and payment requests that track async responses. The design leans toward production use, with concurrent-send safety, crash-safe resume, and delivery retries built in. Keep in mind the invoicing module is experimental and the SDK expects a running Unicity wallet-api backend, so it suits teams ready to operate on that network, not teams hunting for a drop-in wallet.