wire / link-relation / preconnect

preconnect

Link relation type "preconnect": Used to indicate an origin that will be used to fetch required resources for the link context. Initiating an early connection, which includes the DNS lookup, T….

link-relation kind link-relation status standard verification verified tier A iana-registry-row@1

registry record

value: preconnect

Relation Name	preconnect
Description	Used to indicate an origin that will be used to fetch required resources for the link context. Initiating an early connection, which includes the DNS lookup, TCP handshake, and optional TLS negotiation, allows the user agent to mask the high latency costs of establishing a connection.
Reference	[HTML]
Notes

provenance

source: https://www.iana.org/assignments/link-relations/link-relations-1.csv
version: IANA registry, Last-Modified: Mon, 12 Jan 2026 18:11:26 GMT
retrieved: 2026-05-29 · updated: 2026-05-29

agent: curl -H 'accept: application/json' wire.phall.io/link-relation/preconnect or /link-relation/preconnect.json