Free AI crawler access tester is a practical way to find out whether AI search crawlers are allowed to request your website and receive a usable page. Visible Pilot’s automated tester is still being built, so this page does not pretend to run a scan that does not exist. Instead, it gives you a transparent manual test you can use today, plus the exact checks and scoring rules planned for the free tool.
Launch status: the automated URL field is coming soon. Until then, use the five-check scorecard below. It requires no account and helps you separate robots policy, HTTP delivery, security blocking, content availability, and genuine crawler evidence.
What the free AI crawler access tester will check
A useful access test must do more than read robots.txt. A crawler can be allowed by policy yet receive a 403 challenge from a firewall. It can receive 200 but land on a login page, empty client-rendered shell, or redirect loop. Conversely, a named crawler may be absent from a robots file yet still inherit a permissive wildcard group. The result has to show the evidence behind each conclusion.
| Check | Evidence | Pass condition |
|---|---|---|
| Crawler policy | Effective robots.txt rule for each tested agent | The chosen crawler is not disallowed from the URL. |
| HTTP delivery | Status, redirect chain, content type, response size | Final response is a stable 200 HTML page. |
| Security layer | CDN/WAF action and challenge behavior | Verified crawler traffic is not blocked or challenged. |
| Readable content | Title, canonical, robots meta and meaningful main text | Essential content exists in the delivered HTML. |
| Identity evidence | Trusted log IP matched to current official ranges | A real visit can be distinguished from a spoofed user-agent. |
The planned first release will test search-oriented agents first, because access for discovery is not the same as permission for model training. OpenAI documents OAI-SearchBot as the control for ChatGPT search visibility and GPTBot as a separate training crawler. Perplexity similarly documents PerplexityBot for search discovery and Perplexity-User for user-triggered retrieval. A combined “AI bot allowed” label would hide those important differences.
How it works: request path, tests, scoring rules, and limits
The automated tester will take one public HTTP or HTTPS URL, normalize it, fetch the domain’s robots file, calculate the applicable rules for supported crawlers, follow a limited redirect chain, inspect the final response, and record observable delivery signals. It will not log into private pages, bypass a CAPTCHA, defeat a firewall, or claim to represent requests from an operator’s genuine crawler IP space.
That last boundary matters. Changing a curl user-agent to OAI-SearchBot or PerplexityBot can reveal user-agent-specific behavior, but it does not authenticate the request. The connection still originates from the tester’s server. Genuine identity requires a source IP captured by a trusted edge or origin log and checked against the provider’s current official ranges.
What a pass means: the tested URL appears technically accessible under the observed conditions. It does not prove that an AI platform has crawled, indexed, selected, mentioned, or cited the page. Access removes one possible barrier; it is not a visibility guarantee.
The planned 100-point scoring model
The score will be an explanation aid, not a scientific probability of citation. Each layer contributes 20 points. Critical failures—such as an effective Disallow, persistent 403, redirect loop, non-HTML destination, or empty main content—will prevent an overall pass even if other checks succeed. This avoids the misleading result where four minor passes conceal one blocking failure.
| Score band | Result | Interpretation |
|---|---|---|
| 80–100 with no critical failure | Pass | No obvious access barrier was detected in the tested path. |
| 50–79 or incomplete evidence | Warning | The page may be accessible, but one or more checks are weak or inconclusive. |
| 0–49 or any critical failure | Fail | A policy, delivery, or security condition is likely preventing useful access. |
Scores should always be read beside the raw evidence: requested URL, final URL, timestamp, status, content type, applicable robots group, detected meta directives, and any limitation. If the evidence is unavailable, the tool should say “inconclusive” rather than manufacture certainty.
Results explained: pass, warning, fail, and recommended fix
Pass means the tested crawler is not disallowed, the URL resolves successfully, and the response contains meaningful HTML without an observed challenge. The recommended action is monitoring: keep the evidence, retest important templates after CDN, plugin, theme, or firewall changes, and verify genuine crawler visits in logs when available.
Warning is for partial evidence. Examples include a timeout, intermittent 5xx response, long redirect chain, unusual content type, missing canonical, JavaScript-dependent main copy, or a robots file that cannot be fetched consistently. The fix depends on the exact warning; the page should not be labelled blocked until the failure is reproduced.
Fail requires a clear barrier, such as an effective disallow rule for the chosen bot, 401/403 response, challenge page, redirect loop, or final response without useful page content. Fix the smallest confirmed cause, then repeat the same test with the same URL and crawler identity.
Example: a healthy page and a blocked page
Imagine two public product pages. The healthy page returns a stable 200 after one HTTPS redirect, serves text/html, exposes its title and primary copy in the response, and has no applicable disallow rule for OAI-SearchBot or PerplexityBot. Its CDN log shows no challenge. That is a defensible access pass—still not proof of inclusion in an answer.
The blocked page loads normally for a browser but returns 403 when a crawler-like identity is used. Its robots policy allows the crawler. The discrepancy points away from robots and toward bot management, rate limiting, a managed firewall rule, or hosting security. The next evidence to inspect is the CDN/WAF event ID and matched rule, not another edit to robots.txt.
| Observation | Healthy example | Problem example |
|---|---|---|
| Robots decision | Allowed or no applicable disallow | Allowed; policy is not the blocker |
| Final HTTP response | 200 HTML | 403 or managed challenge |
| Main content | Present in returned HTML | Replaced by error/challenge page |
| Best next step | Monitor real visits | Trace the edge rule and retest safely |
Do not create a blanket allow rule based only on a user-agent name. User-agent strings are easy to spoof. Where a WAF exception is necessary, combine the intended crawler identity with the operator’s current published IP ranges and monitor the result.
Privacy and data handling
The future free tester should request only the submitted public URL and the public resources required to evaluate it, such as robots.txt and the final page. It should exclude passwords, form submissions, private dashboards, cookies, authentication tokens, and unrelated pages. Visible Pilot should publish a retention period before launch and avoid claiming “nothing is stored” until that behavior is implemented and verified.
For the manual process on this page, you choose what to inspect and keep. When sharing server or WAF evidence, remove session identifiers, authorization headers, personal data, full query strings, and unrelated IP addresses. Preserve only the fields needed to diagnose the request: timestamp, tested URL, status, redirect, matched rule, claimed agent, and verified source address where appropriate.
Troubleshooting invalid URLs, protection, timeouts, and inconclusive tests
| Problem | Likely cause | Safe response |
|---|---|---|
| Invalid URL | Missing scheme, typo, unsupported private host | Use the canonical public HTTPS URL. |
| Timeout | Slow origin, DNS issue, overloaded service, blocked test server | Retry once, check uptime, then inspect edge/origin logs. |
| 403 or challenge | WAF, bot management, rate limit, hosting security | Find the exact matched rule before changing access. |
| 200 with little content | Client rendering, consent wall, soft error, personalization | Inspect returned HTML and compare with the browser view. |
| Different results over time | Caching, propagation, rotating security policy | Retest with timestamps and request IDs. |
An inconclusive result is useful when it names the missing evidence. For example, “robots allows this agent, but the HTTP request timed out before a final response” is more honest and actionable than either pass or fail. It tells the owner to investigate delivery while preserving the policy result.
Related manual checks you can run now
Start with three representative URLs: the homepage, one commercial page, and one recent article. Open each URL in a private browser session. Then fetch /robots.txt and locate the most specific applicable group for the crawler you care about. Remember that rules are evaluated by crawler identity; do not assume GPTBot, OAI-SearchBot, ChatGPT-User, and PerplexityBot have the same purpose or control.
curl -I -L https://example.com/important-page/
curl -A "Mozilla/5.0 (compatible; OAI-SearchBot/1.0; +https://openai.com/searchbot)" \
-I -L https://example.com/important-page/Compare the ordinary and crawler-identity results: status codes, redirect destinations, content type, cache headers, response size, canonical URL, and robots meta directive. Treat this as behavior testing only. If a real crawler appears in logs, verify the source IP against the operator’s current official JSON ranges before adding any security exception.
For a deeper workflow, use Visible Pilot’s AI crawler IP verification guide and the PerplexityBot 403 troubleshooting guide. The broader AI Search Readiness Checklist covers content clarity, index controls, and evidence beyond access.
Frequently asked questions
Is a free AI crawler access tester accurate?
It can accurately report observable policy and HTTP behavior when it shows the request, timestamp, response, and limits. It cannot prove future crawling or citation, and a simulated user-agent cannot authenticate a genuine operator visit.
Which sites will the tester support?
The planned scope is publicly reachable HTTP and HTTPS pages. Private networks, login-only content, password-protected staging sites, and pages that require bypassing a challenge should be reported as unsupported or inconclusive.
How often should I retest?
Retest after changes to robots rules, CDN/WAF settings, hosting, redirects, plugins, themes, or rendering. For important templates, a monthly check plus change-triggered checks is a reasonable starting point.
Does allowing GPTBot make my site appear in ChatGPT search?
No. OpenAI documents GPTBot for training and OAI-SearchBot for ChatGPT search discovery. Their controls are independent. Allowing access also does not guarantee that a page will be selected or cited.
Can the tester prove that PerplexityBot visited my site?
Not from a remote simulated request. Proof requires a real log event whose trusted source IP matches Perplexity’s current published range, alongside the request and response evidence.
Run the free Visible Pilot check
Coming soon: the automated free AI crawler access tester will turn this workflow into a fast, evidence-led scan with no fake certainty. For now, bookmark this page and use the manual five-check scorecard. You can also visit Visible Pilot for product updates.
Official references
OpenAI crawler documentation — crawler purposes, independent controls, user-agent formats, and official IP-range endpoints.
Perplexity crawler documentation — PerplexityBot and Perplexity-User purposes, WAF guidance, and official IP sources.
Conclusion: a trustworthy free AI crawler access tester must show how it reached its answer. Until Visible Pilot’s automated version launches, the manual process above gives you the same core discipline: test policy, delivery, security, content, and identity separately; preserve the evidence; fix only confirmed barriers; and never confuse technical access with guaranteed AI visibility.
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