Decoding Gemini API Errors: A Guide to Parts Array Configuration
Published:Jan 5, 2026 08:23
•1 min read
•Zenn Gemini
Analysis
This article addresses a practical pain point for developers using the Gemini API's multimodal capabilities, specifically the often-undocumented nuances of the 'parts' array structure. By focusing on MimeType specification, text/inlineData usage, and metadata handling, it provides valuable troubleshooting guidance. The article's value is amplified by its use of TypeScript examples and version specificity (Gemini 2.5 Pro).
Key Takeaways
- •The article focuses on resolving 400/500 errors related to the Gemini API.
- •It highlights the importance of correctly configuring the 'parts' array for multimodal functionality.
- •The guide provides solutions for issues related to MimeType, text/inlineData usage, and metadata handling.
Reference
“Gemini API のマルチモーダル機能を使った実装で、parts配列の構造について複数箇所でハマりました。”