01Does connecting Nano Banana MCP cost anything?
Connecting and listing models never submit a generation. Only generate_media spends credits, based on the chosen model and parameters, at the same price as the website and OpenAPI. Failures, timeouts and moderation rejections are refunded. Your AI tool's own subscription is billed separately.
02Which accounts can use it?
Like the OpenAPI, it is open to paid accounts only: any past top-up, subscription or renewal counts. Accounts with bonus credits only receive a 403 message. No captcha is required when calling with an API key.
03What if the connection fails or returns 401?
Make sure you use https://www.nano-banana.cn/api/mcp/, remote HTTP mode and a valid API key. The header must read Authorization: Bearer, a space, then the key. Never put the key in the URL. If your client cannot send custom headers or only supports OAuth, it cannot connect with this setup.
04What if a generation times out or disconnects?
A network timeout does not mean the generation failed. Have the assistant keep the data.id returned by generate_media and query that same task at least 10 seconds apart instead of resubmitting. If you cannot tell whether a submission went through, check your task history on the website.
05Are video or local file uploads supported?
Not yet. Like the OpenAPI, Nano Banana MCP exposes image models only. For reference images, provide public http(s) image links; the server copies them before generating.
06How do I keep my API key safe?
Use a separate key for each tool and store it only in that tool's secure config. Never paste it into chats, public repositories, screenshots or logs. Send the key only to nano-banana.cn and never when downloading images. If it leaks, disable it in the console right away and create a new one.