set $block 0;

if ($http_user_agent ~* "(AddSearchBot|AI2Bot|AI2Bot\-DeepResearchEval|Ai2Bot\-Dolma|aiHitBot|amazon\-kendra|Amazonbot|AmazonBuyForMe|Andibot|Anomura|anthropic\-ai|Applebot|Applebot\-Extended|atlassian\-bot|Awario|bedrockbot|bigsur\.ai|Bravebot|Brightbot\ 1\.0|BuddyBot|Bytespider|CCBot|Channel3Bot|ChatGLM\-Spider|ChatGPT\ Agent|ChatGPT\-User|Claude\-SearchBot|Claude\-User|Claude\-Web|ClaudeBot|Cloudflare\-AutoRAG|CloudVertexBot|cohere\-ai|cohere\-training\-data\-crawler|Cotoyogi|Crawl4AI|Crawlspace|Datenbank\ Crawler|DeepSeekBot|Devin|Diffbot|DuckAssistBot|Echobot\ Bot|EchoboxBot|FacebookBot|facebookexternalhit|Factset_spyderbot|FirecrawlAgent|FriendlyCrawler|Gemini\-Deep\-Research|Google\-CloudVertexBot|Google\-Extended|Google\-Firebase|Google\-NotebookLM|GoogleAgent\-Mariner|GoogleOther|GoogleOther\-Image|GoogleOther\-Video|GPTBot|iAskBot|iaskspider|iaskspider/2\.0|IbouBot|ICC\-Crawler|ImagesiftBot|imageSpider|img2dataset|ISSCyberRiskCrawler|Kangaroo\ Bot|KlaviyoAIBot|KunatoCrawler|laion\-huggingface\-processor|LAIONDownloader|LCC|LinerBot|Linguee\ Bot|LinkupBot|Manus\-User|meta\-externalagent|Meta\-ExternalAgent|meta\-externalfetcher|Meta\-ExternalFetcher|meta\-webindexer|MistralAI\-User|MistralAI\-User/1\.0|MyCentralAIScraperBot|netEstate\ Imprint\ Crawler|NotebookLM|NovaAct|OAI\-SearchBot|omgili|omgilibot|OpenAI|Operator|PanguBot|Panscient|panscient\.com|Perplexity\-User|PerplexityBot|PetalBot|PhindBot|Poggio\-Citations|Poseidon\ Research\ Crawler|QualifiedBot|QuillBot|quillbot\.com|SBIntuitionsBot|Scrapy|SemrushBot\-OCOB|SemrushBot\-SWA|ShapBot|Sidetrade\ indexer\ bot|Spider|TavilyBot|TerraCotta|Thinkbot|TikTokSpider|Timpibot|TwinAgent|VelenPublicWebCrawler|WARDBot|Webzio\-Extended|webzio\-extended|wpbot|WRTNBot|YaK|YandexAdditional|YandexAdditionalBot|YouBot|ZanistaBot)") {
    set $block 1;
}

if ($request_uri = "/robots.txt") {
    set $block 0;
}

if ($block) {
    return 403;
}