Link response headers

What it checks

The extension requests the site’s root (/) and looks for a Link response header. When one is present, it lists the rel values it found. An agent can read these relationships from the headers alone, without parsing the HTML.

Results

Status	When
Pass	The root document sends a Link header
Info	The root document sends no Link header

This is a bonus check: a Link header adds points, and its absence costs nothing.

How to fix

Add Link headers to your responses for the relationships you already express in HTML. For example, pointing to a canonical URL and a Markdown version:

Link: <https://example.com/>; rel="canonical",
      <https://example.com/index.md>; rel="alternate"; type="text/markdown"

On Cloudflare Pages or Netlify, a _headers file can set this:

/
  Link: </index.md>; rel="alternate"; type="text/markdown"

See also Markdown alternate link.

Support by agent and browser

Announced means the vendor’s own docs or announcement say so. Published is the date on the vendor’s own page, where it has one. Checked is the last time our weekly research found that page still saying so.

No agent or browser has announced anything about this yet.

No evidence yet27

• ChatGPT
• Claude
• Gemini
• Perplexity
• Copilot
• Meta AI
• ChatGPT Atlas
• Comet
• Dia
• Gemini in Chrome
• Edge Copilot Mode
• Claude Code
• Cursor
• Codex
• GitHub Copilot
• Windsurf
• CCBot
• Applebot
• Amazonbot
• Bytespider
• Cohere
• Mistral
• DuckAssist
• Chrome
• Edge
• Firefox
• Safari

Names and marks belong to their owners and are used only to identify products. None of these vendors is affiliated with Sitebulb. Spotted something out of date? Send a correction.

Adoption on the top 100 sites

10%

10 of 100 measured sites implement it

Scanned 23 Oct 2026 with the Sitebulb Labs extension, against the Tranco list (tranco-56Z8N).

Sites implementing it10

1. #2 cloudflare.com
2. #27 outlook.live.com (via live.com)
3. #52 uk.pinterest.com (via pinterest.com)
4. #55 wordpress.org
5. #61 adobe.com
6. #69 uk.yahoo.com (via yahoo.com)
7. #83 ya.ru (via yandex.net)
8. #103 reddit.com
9. #112 chatgpt.com
10. #135 discord.com (via discord.gg)

Overview

5/9

Gaining traction

Real support exists and adoption is growing.

How this rating is worked out5 of 9 points

Factor	Points	Why
Vendor support	0 / 3	0 vendors supporting, 0 partly or planned
Top-100 adoption	2 / 3	10% of measured sites
Spec maturity	3 / 3	Published standard

8 or more points is Established, 5 to 7 is Gaining traction, 2 to 4 is Speculative and under 2 is Stalled. A feature is also Stalled when more vendors have said no than yes. Read the spec.

Community insights

No community insights for this feature yet.

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