Clarity contracts have no TypeScript integration. Manual type definitions drift. Call parameters are untyped strings. You deploy a contract with 20 functions. Every call site in your app? Untyped. Every parameter? Hope you got the order right.

secondlayer generates type-safe interfaces from contract source or deployed contracts. Point at a contract address or local file. Auto-infers network from address prefix. Get TypeScript that knows your contract.

Generated interfaces match your contract exactly. Helper functions for read/write calls. Type-safe parameters — wrong types don't compile. Every public function. Every argument. Every return type.

Extend generation with plugins. clarinet() reads from Clarinet projects. react() generates hooks. testing() adds mock helpers. Pick what you need. Skip what you don't.

Install. Run. Get types. Zero config for basic usage — just point at a contract address and go.