TidyToolsAI Crawler Index · data as of · updated daily

AI crawler access · nicovideo.jp

Does nicovideo.jp block GPTBot and other AI crawlers?

GPTBot: blockedAs of 2026-10-02, the robots.txt of nicovideo.jp blocks 1 of 29 AI crawlers on the home page and partially blocks 1 more: GPTBot is blocked, ClaudeBot is allowed and PerplexityBot is allowed.

All 29 AI crawlers on nicovideo.jp

Status for the home page (/) under nicovideo.jp's robots.txt. Partially blocked = home page allowed, some paths disallowed.

CrawlerOperatorrobots.txt
Training crawlers
GPTBotOpenAIblocked
ClaudeBotAnthropicallowed
Google-ExtendedGoogleallowed
Applebot-ExtendedAppleallowed
Meta-ExternalAgentMetaallowed
AmazonbotAmazonallowed
MistralAI-TrainingMistralallowed
CCBotCommon Crawlallowed
BytespiderByteDanceallowed
cohere-aiCohereallowed
AI search crawlers
OAI-SearchBotOpenAIallowed
Claude-SearchBotAnthropicallowed
PerplexityBotPerplexityallowed
Google-CloudVertexBotGoogleallowed
ApplebotApplepartial
meta-webindexerMetaallowed
Amzn-SearchBotAmazonallowed
DuckAssistBotDuckDuckGoallowed
MistralAI-IndexMistralallowed
User-triggered fetch crawlers
ChatGPT-UserOpenAIallowed
Claude-UserAnthropicallowed
Perplexity-UserPerplexityallowed
Google-GeminiNotebookGoogleallowed
Google-AgentGoogleallowed
meta-externalfetcherMetaallowed
Amzn-UserAmazonallowed
MistralAI-UserMistralallowed
Ads review crawlers
OAI-AdsBotOpenAIallowed
meta-externaladsMetaallowed

Compared with other entertainment sites in the index: 10% of them block GPTBot and 9.1% block ClaudeBot (n=329). Across all 8,366 readable sites: 12% block GPTBot. All entertainment sites →

On .jp (Japan) domains: 6% of 149 readable sites block GPTBot and 6% serve an llms.txt. All .jp (Japan) sites →

History

No change recorded since daily tracking started on 2026-10-02. We re-check nicovideo.jp every day; a change in its AI crawler rules shows up here and on the index page.

FAQ

Does nicovideo.jp block GPTBot?
Yes. As of 2026-10-02, https://nicovideo.jp/robots.txt disallows the home page for GPTBot, OpenAI's AI training crawler.
Does nicovideo.jp block ClaudeBot?
No. As of 2026-10-02, https://nicovideo.jp/robots.txt allows ClaudeBot, Anthropic's AI training crawler, on the home page.
Does nicovideo.jp block PerplexityBot?
No. As of 2026-10-02, https://nicovideo.jp/robots.txt allows PerplexityBot, Perplexity's AI search crawler, on the home page.
Can ChatGPT search (OAI-SearchBot) crawl nicovideo.jp?
No. As of 2026-10-02, https://nicovideo.jp/robots.txt allows OAI-SearchBot, OpenAI's AI search crawler, on the home page.
Does nicovideo.jp block Google-Extended (Gemini training)?
No. As of 2026-10-02, https://nicovideo.jp/robots.txt allows Google-Extended, Google's AI training crawler, on the home page.
Does nicovideo.jp have an llms.txt file?
No. As of 2026-10-02, nicovideo.jp does not serve a plain-text /llms.txt file.
How can I check nicovideo.jp or my own site again?
Use the free AI crawler checker at tools.yukai.uk/free/ai-crawler-checker (no sign-up). To check many sites and get alerts when rules change, use the AI Crawler Access Checker on Apify.

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Other entertainment sites block GPTBot · Which .jp (Japan) sites block GPTBot · What is nicovideo.jp built with? (Tech Stack Index)

All 10,000 sites · All 29 AI crawlers · AI Crawler Index