SearXNG MCP doesn't work (with workaround)

I've been trying to get SearXNG working for a couple of days but although the MCP was loaded correctly, the searches wouldn't work. The setup works perfectly when loading the MCP standalone or within Zoo Code.

I got fed up trying and asked Antigravity to check it out and it came up with the reason and a workaround solution. Use this information any way you want. Users can use it to work around the problem, developers can use it to fix the problem.

The proxy script and report are attached.

[analysis_results.md](https://github.com/user-attachments/files/31470492/analysis_results.md)

[mcp-searxng-proxy.js](https://github.com/user-attachments/files/31470374/mcp-searxng-proxy.js)

Start by reading the attached analysis_results.md and mcp-searxng-proxy.js, then reproduce the SearXNG MCP search failure in AionCore and compare it with standalone or Zoo Code behavior. Done means identifying the integration failure and confirming that SearXNG searches work through the MCP without relying on the workaround.

Written by the indexing model from the issue text.