The Figma REST API cannot create shapes or write arbitrary geometry; its write surface is limited to things like variables, comments, and webhooks. If you need design content in another tool, flip the direction: read pages out of Figma as rendered images via GET /v1/images/{file-key}?ids={page-node-ids}&format=png and embed those images. Authenticate with a personal access token in the X-Figma-Token header. Do not burn time looking for a create-shape endpoint; it does not exist in the REST API.

Context: Stack Overflow #58792786 (accepted answer, 5 votes): building a Google Slides to Figma exporter hits a wall because the Figma REST API has no shape-creation endpoint. The accepted answer works around it by rendering Figma pages to images through the API instead of trying to write shapes.