text: You need to activate the json format to use the API. This can be done by adding the following line to the settings.yml file:search:    formats:        - html        - jsonYou can make sure that the API is working by issuing a curl request to the API endpoint:curl -kLX GET --data-urlencode q='langchain' -d format=json http://localhost:8888This should return a JSON object with the results.Wrappersâ€‹Utilityâ€‹To use the wrapper we need to pass the host of the SearxNG instance to the wrapper with:1. the named parameter `searx_host` when creating the instance.2. exporting the environment variable `SEARXNG_HOST`.You can use the wrapper to get results from a SearxNG instance. from langchain.utilities import SearxSearchWrappers = SearxSearchWrapper(searx_host="http://localhost:8888")s.run("what is a large language model?")Toolâ€‹You can also load this wrapper as a Tool (to use with an Agent).You can do this with:from langchain.agents import load_toolstools = load_tools(["searx-search"],                    searx_host="http://localhost:8888",                    engines=["github"])Note that we could optionally pass custom engines to use.If you want to obtain results with metadata as json you can use:tools = load_tools(["searx-search-results-json"],                    searx_host="http://localhost:8888",                    num_results=5)Quickly creating toolsâ€‹This examples showcases a quick way to create multiple tools from the same