LINE Bot powered by Vertex AI Agent Development Kit & Firebase. Multimodal card │ scanning, natural language database tools, vCard QR Code import, and robust local fallback search. (opens in new tab)

Preface In the previous article, we successfully upgraded the LINE business card assistant robot (linebot-namecard-python) from the AI Studio API Key verification mode to the enterprise-grade Google Cloud Vertex AI mechanism, completely freeing us from the 429 quota anxiety. However, the original method of searching for business cards had significant limitations: We had to first fetch all the user's business cards from Firebase, package them into a huge JSON array, and then stuff them into th...