Six keyless GET endpoints about crawlers and robots.txt: verify that an IP really belongs to the crawler it claims to be, lint a robots.txt, decide one path for one crawler under RFC 9309, audit which AI crawlers a robots.txt really blocks, classify a User-Agent, and say whether a crawler can be verified at all. No account, no key, no handshake; open CORS, strong ETag, CC0. Rebuilt every six hours from the operators own published docs and IP ranges.
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Secure random string generator
Code compiler supporting 35+ languages mentioned at wandbox.org
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