Cloud / hosting API

FCM legacy HTTP and XMPP APIs

Legacy FCM sending interfaces replaced by HTTP v1.

StatusReplaced

Still usableNo

Action requiredMigrate

Production riskCritical

Current state

Legacy paths decommissioned

Firebase deprecated legacy HTTP/XMPP message sending on June 20, 2023 and documented shutdown beginning July 22, 2024. That date is treated as shutdown start, not an invented universal completion date. HTTP v1 is the supported migration target.

Provider: Firebase
Replacement: FCM HTTP v1 API
Last checked: 2026-08-20

Evidence

Official source

Firebase migration guide