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Reported issues for nanobanana-mcp-server

Pod holds 8 of 8 problems reported by people outside the maintainer team. Issues filed by the project's own owners, members and collaborators are excluded entirely — a maintainer's release checklist is not a warning to a prospective user.

Back to nanobanana-mcp-server.

Most discussed

Vertex AI is not responding.

Vertex AI was working recently, but it's not working now. Sends request, no error, no response, just waits. I use Claude in the code. Could you please check?

Read the thread · 2026-05-17 · closed · external user · 2 comments

region auth

i think you need to set the region to global in order for it to work on VERTEX AI - GCP_REGION=us-central1 should be global instead

Read the thread · 2026-04-20 · closed · external user · 1 comment

Edit mode ignores model_tier and always uses gemini-2.5-flash-image

Bug Report

Summary

When using generate_image in edit mode, the model_tier parameter is completely ignored. The edit always uses gemini-2.5-flash-image (legacy Flash) regardless of the requested tier (pro, nb2, etc.).

Steps to Reproduce

  1. Generate an image with model_tier: "pro" and resolution: "2k" — works correctly, uses gemini-3-pro-image-preview
  2. Edit the generated image with model_tier: "pro", mode: "edit" — the API logs show gemini-2.5-flash-image

Read the thread · 2026-03-17 · closed · external user · 1 comment

Feature Request: Add option to return full-resolution images in MCP response instead of thumbnails

Summary

Currently, the server returns thumbnail previews in the MCP response while saving full-resolution images to disk. It would be valuable to have a configuration option to return full-resolution images directly in the MCP response.

Use Case

Many MCP clients display images inline within their chat interface. When only thumbnails are returned, users see low-quality previews and must manually navigate to the disk path to view the actual generated images. This breaks the workflow and r

Read the thread · 2026-01-17 · closed · external user · 2 comments

"image_size" not supported in google-genai==1.41.0, require later version of google-genai dependency

Thank you for your code!

In pyproject.toml, one of the dependencies is "google-genai>=1.41.0", but if you use "google-genai==1.41.0", you will get a validation error since "image_size" is not in ImageConfig: https://github.com/googleapis/python-genai/blob/v1.41.0/google/genai/types.py#L3844 (on another note, neither is "output_mime_type", but that is another issue per https://github.com/zhongweili/nanobanana-mcp-server/issues/11)

I upgraded google-genai to the latest version 1.57.0 and it wo

Read the thread · 2026-01-14 · closed · outside contributor · 2 comments

Error: Error calling tool 'generate_image': output_mime_type parameter is not supported in Gemini API.

When attempting to use the generate_image tool through the MCP server, the process fails with a Gemini API error stating that the output_mime_type parameter is not supported.

Error: Error calling tool 'generate_image': output_mime_type parameter is not supported in Gemini API.

Read the thread · 2026-01-11 · closed · external user · 2 comments

Broken Link: MCP Registry

When clicking on the following link, the 404 page is reached:

Installation Option 1: From MCP Registry (Recommended) This server is available in the Model Context Protocol Registry. Install it using your MCP client.

"Endpoint not found. Did you mean '/v0/servers/io.github.zhongweili/nanobanana-mcp-server'? See /docs for the API documentation."

Read the thread · 2025-10-02 · closed · external user · 1 comment

Aspect Ratio workaround

This is A wonderful MCP! surprised it's the first of it's kind. Very likely it will get more popular soon.

Regarding aspect ratios - Nano banana for some reason cannot generate images that are not 1:1 aspect ratio right now.

I saw a trick online that using edit instead of create, we can provide a desired aspect black image, and then it generates on top of that. https://www.youtube.com/watch?v=1ttvmsGSR_Y

It would be interesting to integrate it into the server, as a separate non- 1:1 aspect ra

Read the thread · 2025-09-24 · closed · external user · 1 comment

Most recent

The remaining reports are on the project's issue tracker.