Question library

llms.txt questions and answers

Short answers for common implementation decisions. Each page includes practical steps and links to related tools. For Chinese resources, visit 中文问题库.

Setup

Where to put llms.txt

Exact file path, canonical URL, and deployment checks.

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SEO

Does llms.txt help SEO

What it can improve, and what it cannot replace.

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Validation

How to test llms.txt

Fast checks for syntax, links, crawlability, and policy alignment.

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Robots

Can llms.txt replace robots.txt

Why permissions and source mapping are separate decisions.

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Sitemaps

Can llms.txt replace sitemap.xml

Discovery vs curation, and how to run both files together.

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Scope

How many links in llms.txt

A practical range by site type and content maturity.

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Logs

How to check GPTBot visits

Identify GPTBot and related AI crawlers from user-agent lines.

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Logs

How to check ClaudeBot visits

Track training-crawler access and status codes for ClaudeBot.

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Logs

How to check ChatGPT-User visits

Measure user-triggered retrieval requests in your logs.

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Logs

How to check OAI-SearchBot visits

Verify OpenAI search crawler access with path and status checks.

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Logs

How to check Claude-SearchBot visits

Separate Claude crawl tokens and validate crawl status by path.

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Logs

Why Claude-SearchBot has no hits

A focused checklist for zero-hit windows behind Cloudflare and mixed policy layers.

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Logs

How to check PerplexityBot visits

Inspect Perplexity crawler paths and stability across days.

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Verification

How to verify AI crawler authenticity

Use behavior signals to separate real crawlers from spoofed user-agent traffic.

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Search Console

Submit llms.txt to Google?

What to submit, what not to submit, and what actually matters.

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Tools

How to choose an llms.txt generator

Use five practical criteria before adopting one for production use.

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B2B

What pages should B2B llms.txt include

A page-priority framework for lead-generation sites to improve AI answer quality.

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Policy

Should I allow OAI-SearchBot

Visibility-first policy pattern for OpenAI search crawler access.

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Policy

Should I allow Claude-SearchBot

Separate Claude search visibility policy from ClaudeBot training control.

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Policy

Should I allow PerplexityBot

Perplexity crawler policy basics for answer-surface visibility.

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OpenAI

Can robots block ChatGPT-User

Understand user-triggered access vs automatic crawler controls.

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Maintenance

How often update llms.txt

A practical weekly and monthly maintenance cadence.

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Troubleshooting

Why GPTBot is still blocked

Fix wildcard conflicts, stale files, and policy deployment issues.

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Cloudflare

How to fix Cloudflare 525 with Caddy

Use origin TLS, SNI, and port checks to isolate SSL handshake failures.

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Cloudflare

How to fix Cloudflare 525 with Nginx

Check certificate chain, server block match, and TLS listener behavior.

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Cloudflare

How to fix Cloudflare 526 invalid certificate

Validate cert chain, hostname match, and strict TLS requirements.

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Cloudflare

How to fix Cloudflare 521 web server down

Check origin process, listening ports, and firewall connection blocks.

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Cloudflare

How to fix Cloudflare 520 unknown error

Compare edge and origin responses to isolate malformed header failures.

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Cloudflare

How to fix Cloudflare 522 timeout

Diagnose origin latency and network timeouts in production.

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Cloudflare

How to fix Cloudflare 523 origin unreachable

Validate DNS-to-origin mapping and route availability.

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Cloudflare

How to fix Cloudflare 524 timeout occurred

Identify slow endpoints and reduce synchronous response time.

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Cloudflare

Cloudflare 520 vs 524

Quickly tell malformed-response failures from true timeout failures.

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Cloudflare

Why OAI-SearchBot gets 403 behind Cloudflare

Find edge-layer blocks when robots policy says allow.

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Cloudflare

Allow OAI-SearchBot in Cloudflare WAF

Add a narrow allow rule without exposing private or abuse-prone paths.

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Cloudflare

Does Bot Fight Mode block AI crawlers

Verify challenge-based edge protections that can block crawler access.

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Cloudflare

Cloudflare 52x differences

Quickly distinguish 520-526 and pick the right first checks.

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ChatGPT

Does ChatGPT use llms.txt?

Separate confirmed retrieval signals from low-cost source-map hygiene.

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ChatGPT

How to get cited by ChatGPT

Use crawl access, index discovery, quotable answers, and log verification.

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Measurement

How to track AI search referrals

Separate crawler discovery from real referral visits in server logs.

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Case study

LLMs File traffic baseline (May 2026)

Real logs, measured baseline, and the exact actions selected after first-stage data.

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Robots

How to test one robots.txt rule

Validate one user-agent and one URL path with longest-match logic.

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New

Should I allow GPTBot?

GPTBot is OpenAI's training crawler, not its search crawler. Learn what allowing or blocking GPTBot actually changes for visibility, trainin

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New

Should I allow Google-Extended?

Google-Extended controls whether your content trains and grounds Gemini. Blocking it does not affect Google Search ranking. Here is how to d

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New

What is Google-Extended?

Google-Extended is a robots.txt token that controls Gemini training and grounding, separate from Google Search crawling. Here is what it doe

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New

Should I block Bytespider?

Bytespider is ByteDance's crawler and is often aggressive. Learn when blocking it makes sense, how to do it safely, and how to confirm it is

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New

What is CCBot?

CCBot is Common Crawl's bot. Its open archive feeds many AI training datasets. Learn what CCBot does and how to allow or block it.

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New

What is GEO (Generative Engine Optimization)?

GEO is optimizing your content to be quoted and cited in AI-generated answers from ChatGPT, Claude, Perplexity, and Google AI Overviews. Her

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