Postmark llms.txt: what the file contains
Measured on 5 October 2026: 28.1 KB, 9 sections, 23 links. How that compares with the other 124 files we track, and what it implies.
Last updated:
The file
Postmark publishes an llms.txt at https://postmarkapp.com/llms.txt.
The file declares itself as Postmark in its H1, and the host is categorised here as SaaS. It was last fetched and parsed on 5 October 2026.
Measured structure
| Measure | Postmark | Corpus median | Percentile |
|---|---|---|---|
| Size | 28.1 KB | 14.0 KB | 67% |
| H2 sections | 9 | 7 | 64% |
| Links | 23 | 70 | 22% |
| Blockquote summary | Present | 107 of 125 have one | n/a |
Percentiles are against the 125 files in this directory, not against the web. That population is deliberately weighted toward documentation platforms and developer tools, which is where the convention started, so treat it as a peer group rather than a norm.
Observations
- The file contains 23 list links, below the corpus median of 70. A short list can make navigation easier, but the count alone does not establish the relevance of its links.
Comparable files
Closest in size within SaaS, from the same weekly check:
- Atlassian: 26.0 KB, 13 sections, 105 links
- HubSpot: 34.7 KB, 29 sections, 225 links
- Wix: 35.8 KB, 22 sections, 132 links
- Notion Developers: 38.3 KB, 1 sections, 255 links, no blockquote summary
How this was measured
The historical check followed redirects, rejected HTML responses and required an initial H1. It counted H2 headings and Markdown list links with regular expressions, rather than running the full validator. Counts and bytes describe the retained response text, subject to the extraction limit. This snapshot was generated on 2026-10-05.
Want to check a file yourself, including this one? Paste the URL into the validator. To see how to find any site's file, see how to find a website's llms.txt, and for the full list see the directory of 125 verified files.