searxng_web_search accepts engines and categories, but the values that will actually resolve come from the /config of your own instance, and searxng_instance_info is the call that reads them back — including which engines are common across instances and which are listed as available. The URL reader is deliberately bounded: PDF text extraction is capped on input, output, page count, time, concurrency and memory, and OCR is not supported, so a scanned page has no text path through it.
A search client for a SearXNG instance named in SEARXNG_URL, with 4 tools: a web search filtered by engine and category, autocomplete, a capability probe against the instance's /config, and a URL reader that returns readable content.
- Search narrowed the way SearXNG itself is configured: searxng_web_search takes a query plus categories, engines, language, time_range, safesearch and a min_score floor, pages with pageno, sizes with num_results, and returns a title, URL and content snippet for each result.
- Result depth as an argument rather than a second round trip: result_detail and response_format set how much of each result comes back on the same call.
- Query refinement before a search is spent: searxng_search_suggestions returns autocomplete suggestions from the configured instance for a partial query in a given language.
- Capability discovery against the live instance: searxng_instance_info reads /config from the reachable configured instances and reports categories.common and categories.available, engines.common and engines.available, defaults, locales and plugins, with refresh, includeEngines and includeDisabled shaping the report.
- Full-page reading with content-type handling: web_url_read converts HTML to markdown, pretty-prints JSON, and returns plain text, YAML, TOML and XML as fenced readable text, with maxLength, startChar, section, paragraphRange and readHeadings available to take a slice instead of the whole page.
A SearXNG instance you can reach, with its base URL supplied as SEARXNG_URL.
One command — npx -y mcp-searxng
