RFC 9309 & AI SEARCH AUDIT

Test Robots.txt for AI Crawlers & LLM Bots

Verify crawler permissions, prevent unintended content scraping, and audit RFC 9309 robots.txt compliance in your browser.

With the rapid expansion of AI search engines and LLM web crawlers like OpenAI's GPTBot, Anthropic's ClaudeBot, and PerplexityBot, managing web indexing permissions is more critical than ever. A syntax mistake in your robots.txt can inadvertently de-index your entire website from Google or expose private internal APIs to scraping. DevOmniTools evaluates path patterns against official RFC 9309 specifications locally.

Interactive Solution Utility

100% Client-Side • Zero Telemetry

Paste your robots.txt file below to test URL path permissions across AI crawlers and traditional search bots:

Quick Presets:

Test URL / Path Against Crawler

Quick AI Test:
Evaluation Result
BLOCKED (DISALLOWED)

Evaluating...

Detected Sitemaps:
https://example.com/sitemap-index.xml

1. Modern AI Crawler User-Agents & Specific Directives

Leading AI companies respect dedicated user-agent tokens. Setting specific allow/disallow blocks gives webmasters granular control over training data ingestion versus live search citations: - **GPTBot:** OpenAI model training crawler. - **ChatGPT-User:** Dispatched when users request live browsing in ChatGPT. - **ClaudeBot / Claude-Web:** Anthropic indexing and real-time retrieval agents. - **PerplexityBot:** Perplexity AI search answer engine.
text Code Example
# Disallow AI training while allowing standard search engines:
User-agent: GPTBot
Disallow: /

User-agent: ClaudeBot
Disallow: /

User-agent: Googlebot
Allow: /

User-agent: *
Allow: /
Disallow: /private/
Disallow: /cdn-cgi/l/

Targeted robots.txt blocks for AI crawlers conforming to RFC 9309.

2. RFC 9309 Longest-Match Precedence Rule

Under the formal IETF RFC 9309 specification, when both `Allow` and `Disallow` rules match a given URI path, the rule with the longest matching character pattern takes precedence. If pattern lengths are equal, `Allow` takes priority.

3. Distinguishing LLM Training Ingestion from Live Search Citations

Blocking model training crawlers does not necessarily remove your website from generative answers if you permit live search user-agents. Configuring `ChatGPT-User` or `Googlebot` allows AI engines to cite your documentation and tools as verifiable real-time sources.

4. Securing Edge Internal Endpoints and Sitemaps

Ensure sensitive system directories (like authentication redirects, staging environments, or edge proxies) are explicitly protected with specific paths while keeping your canonical XML sitemap declared at the end of the file.

Frequently Asked Questions

Does blocking GPTBot affect my rankings on Google Search? ▼

No. GPTBot is exclusively used by OpenAI. Google uses Googlebot and Google-Extended, which are configured separately.

Where should my robots.txt file be hosted? ▼

According to RFC 9309, robots.txt must be placed in the root directory of your website domain: https://example.com/robots.txt.

How does the longest-match rule work? ▼

If you have `Disallow: /tools/` and `Allow: /tools/json/`, a crawler requesting `/tools/json/` will be allowed access because the matching pattern is longer.

Are robots.txt evaluations processed locally? ▼

Yes. The testing suite tokenizes directives and simulates crawler path matching entirely within client memory.

Enterprise Architecture & Reliability Standards

Zero Data Exfiltration Guarantee

All payload parsing, schema validation, and cryptographic calculations execute entirely inside local browser volatile RAM. No secrets, tokens, or personal identifiers are transmitted across remote API gateways or third-party loggers.

Deterministic Precision & RFC Compliance

Conforming strictly to RFC 8259, RFC 7519, RFC 4648, and ISO/IEC 18004 standards. Our test vectors ensure byte-for-byte fidelity with backend microservices across Go, Java, Rust, Node.js, and Python.

Automated CI/CD Integration Testing

Pre-commit hooks and automated staging pipelines validate payloads locally against strict OpenAPI and JSON Schema specifications, eliminating syntax exceptions before reaching production deployment.

Memory Isolation & Threat Hardening

Protected by strict Cross-Origin Opener Policy (COOP) and Cross-Origin Embedder Policy (COEP) browser security contexts, preventing memory inspection and Spectre side-channel exploits.