Bearer token + one HTTP request and you're in.
``bash # 1. Generate a key at /settings/api-keys with the scopes you need # 2. Hit the API curl https://flowsdesigner.com/api/v1/contacts \ -H "Authorization: Bearer $FD_KEY" ``
The full interactive reference (with try-it-out) is at /docs/api. The OpenAPI 3.1 spec lives at /api/v1/openapi.json — feed it to Postman, Stoplight, or any code generator.
/contacts — list / get / create / update / delete/conversations — list / get / end/messages/send — outbound WhatsApp/flows — list + trigger flows/templates — list approved templates/webhooks — subscribe to events/analytics — aggregated metrics/gitops — pull/push flows as a manifest