- [ Home ](/) / - Observatory # llms.txt Observatory A public, dated measurement layer for llms.txt. The figures describe a fixed panel and observable HTTP behavior, not all websites or AI usage. Last updated: August 12, 2026 ## Latest fixed-panel snapshot 51.8% 113 of 218 testable hosts served a qualifying file 14.0 KB median file size across parsed directory files 79.6% parsed directory files with a blockquote summary The current observation was generated on 2026-08-03. The panel is fixed and curated. It should be compared with future releases, not extrapolated to the web. The observatory is designed for reproducibility. It records the public HTTP response, parse outcome and link checks available at release time, so a reader can distinguish adoption, syntax quality and discovery signals instead of treating a served file as proof of AI usage. ## By sector Sector Tested Serving Rate AI & ML 36 19 52.8% Developer tools 61 42 68.9% Docs platforms 7 1 14.3% E-commerce 13 7 53.8% Fintech 16 8 50% Media 14 0 0% Other 23 4 17.4% SaaS 48 32 66.7% ## V2 implementation signals The v2 observation is narrower than a client-support matrix. It recorded 286 reachable links out of 294 checked, 31 Markdown alternates, 4 `describedby` relations, and 21 hosts with a qualifying subpath file. ## Downloads and scope Use the [JSON release manifest](/observatory.json) for source hashes and limitations, the [CSV](/observatory.csv) for sector values, and the [status endpoint](/observatory-status.json) for the current snapshot identifier. Read the full [methodology](/methodology/) before quoting a number. ## Sources - [ Methodology and data limits ](https://llmtxt.info/methodology/) On this page - [ Latest snapshot ](#snapshot) - [ By sector ](#sectors) - [ V2 implementation signals ](#v2) - [ Downloads and scope ](#downloads)