REST API / Webhook / CRM Pipeline with SQL persistence

Self-initiated live API demo with exclusively synthetic records. Implemented JSON API and CRM table with storage in Cloudflare D1. Available GET, POST with server-side fictional presets, and PATCH for controlled pipeline transitions. There is server-side enum validation, prepared SQL, loading/error states, and a limit of 30 records. Free input of personal data is not allowed; persistence is checked by reloading the page. Stack: TypeScript, REST API, webhook pattern, Cloudflare D1, SQL, React.