ETag
Entity tag for the resource. Used with If-None-Match for conditional requests and caching.
ResponseSyntax
ETag: [W/]<tag>Example values
| Value | Explanation |
|---|---|
| "33a64df551425fcc55e4d42a148795d9f25f89d4" | Strong ETag |
| W/"0815" | Weak ETag |
cURL usage
curl -I https://api.example.com/users/1 # Get ETag
Common mistakes
Using weak ETag for byte-for-byte comparison; cache busting issues.