</> Web Validators

Link Header Checker

Inspect the HTTP Link response header and the relations a page advertises in it.

Reads the Link header from the homepage response and lists each relation it declares. Link headers carry discovery information — canonical, alternate, preload and more — without requiring an agent to parse the HTML first. They are optional, so an absent header is informational.

This is one of the checks the AI Agent Readiness Checker scores under Discoverability, and it can also be run on its own for any URL.

Based on: RFC 8288 — Web Linking · RFC 9110 — HTTP Semantics

About this validation

Parses the HTTP Link response header and lists the relations it advertises. Web Linking is a ratified IETF standard; a page is under no obligation to send a Link header.

Rules reviewed:
Nov 11, 2026

Standards and vendor-documented behavior can change. This reflects the source as last reviewed above, not a permanent guarantee.