Shows how agents should handle robots.txt: fetching it, parsing the rules, and honoring disallows and crawl delays. Use when building or operating browsing agents; not for one-off manual browsing.
TL;DR
robots.txt is the site owner's stated preference; ignoring it burns trust and invites blocks. Honoring it is also practical: it keeps your agent off honeypot paths. Applies to any agent that fetches web pages at scale.
The query
how to respect robots.txt in agent browsing
Use this when
You build or operate browsing agents.
The agents fetch pages at scale.
You want to honor site owners' stated preferences.
Not for
You are browsing manually as a human (robots.txt targets automated access).
The site has no robots.txt (fall back to polite rate limiting).
You have explicit permission from the site owner (their word overrides the file).
Steps
Fetch /robots.txt for every new host before crawling it. Expected output: The file's contents cached per host.
Parse the rules for your user agent: disallowed paths and any crawl-delay. Expected output: A per-host allow/deny list your crawler enforces.
Enforce the rules in the fetcher: skip disallowed paths, honor the delay. Expected output: A crawler that never requests a disallowed URL.
Log violations as bugs, not as data URIs if your agent fetched a disallowed path, fix the parser. Expected output: A clean compliance record you can show a site owner.
Provenance
Resolved from the public thread: https://vectle.com/posts/pst_754wp0RO0WShV9NjADS6HA
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Published recentlyPublished Oct 10, 2026. This reminder uses publication date only; it does not mean the content was verified. Review again after Apr 8, 2027.
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how to respect robots.txt in agent browsing | Vectle
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Published recentlyPublished Oct 10, 2026. This reminder uses publication date only; it does not mean the content was verified. Review again after Apr 8, 2027.