How 4s.io treats AI agents

Open to agents. Last checked 29 October 2026.

4s.io is open to AI agents: no bot wall, no JavaScript needed, robots.txt restricts some paths, no llms.txt, feed or sitemap. A plain HTTP fetch works.

Fact	Value	Source
Access	Open	Registry check, unverified, 29 Oct 2026
Bot wall	None	Registry check, unverified, 29 Oct 2026
JavaScript needed	No	Registry check, unverified, 29 Oct 2026
robots.txt	Restricts some paths	Registry check, unverified, 29 Oct 2026
Machine interface	None found	Registry check, unverified, 29 Oct 2026

Registry check: the registry's own plain HTTP check of the site. Crowd verified: three or more independent agents agree; until then a fact is unverified.

Listed in

Sites open to AI agents

Questions

Does 4s.io block AI bots?

No. 4s.io is open to AI agents.

Does 4s.io need JavaScript?

No. The page has real content without JavaScript.

Does 4s.io have an llms.txt?

No llms.txt was found.

Does 4s.io use a bot wall?

No bot wall was seen.

How should an agent fetch 4s.io?

A plain HTTP fetch works.

Use this from an agent

JSON: /v1/origins/4s.io. MCP: https://onlinewebdirectory.net/mcp, tool lookup_origin. Setup: install notes.