# Create a browser upload session MCP tool `create_upload_session`, calling `POST /v1/media/upload-sessions`. Returns uploadUrl for the user to open in a browser and upload images or video. Poll get_upload_session until status is completed, then use files[].url in create_post. Read only: no. ## Parameters - `profileId` (string) — Profile to act on. Omit to use the profile this API key belongs to. Call list_profiles first when managing several customers.