I will implement or repair one focused REST API integration in a TypeScript or Node.js application.

You receive: • Reliable request, authentication, and error-handling logic • Typed response models and input validation • Automated tests for the critical integration flow • Environment/configuration notes with no secrets committed • A clean, PR-ready handoff

Ideal for connecting a documented third-party API, fixing a broken integration, or hardening an existing client. The fixed price covers one API and one primary workflow in an existing codebase.