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What software sites offer agents, month by month.

Each month we check the 5,000 most-linked software sites for what they publish for AI agents and what stands in their way. The first survey ran in October 2026; each new one adds a column.

Latest survey October 20265,000 sitesOpen data, CC BY 4.0JSONMarkdown

Five measures, a column a month.

  • llms.txt

    22% 859 of 3,973 sites · October 2026

    Sites with an llms.txt, on the site or its docs.

    50%0%October 2026: 859 of 3,973 sites (22%)22%Oct ’26
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  • MCP server

    3% 158 of 5,000 sites · October 2026

    Sites with an MCP server, in the official registry or a server card.

    5%0%October 2026: 158 of 5,000 sites (3%)3%Oct ’26
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  • OpenAPI

    2% 82 of 3,973 sites · October 2026

    Sites with an OpenAPI document at the usual paths.

    5%0%October 2026: 82 of 3,973 sites (2%)2%Oct ’26
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  • 402 payment route

    0% 0 of 57 API calls · October 2026

    API calls we made that answered 402 Payment Required.

    1%0%October 2026: 0 of 57 API calls (0%)0%Oct ’26
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  • Bot wall at the home page

    12% 602 of 5,000 sites · October 2026

    Sites whose home page stopped our agent with a bot check or a refusal.

    20%0%October 2026: 602 of 5,000 sites (12%)12%Oct ’26
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Source: our survey of the 5,000 most-linked software sites, 12 to 13 Oct 2026. Open data, CC BY 4.0. The full survey for October 2026

Every month in one table.

MeasureOct 2026
llms.txt22% (859 of 3,973 sites)
MCP server3% (158 of 5,000 sites)
OpenAPI2% (82 of 3,973 sites)
402 payment route0% (0 of 57 API calls)
Bot wall at the home page12% (602 of 5,000 sites)