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Protect your realtime endpoints with custom auth logic.

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Basic Middleware

api/realtime/route.ts
import { handle } from "@upstash/realtime"
import { realtime } from "@/lib/realtime"
import { currentUser } from "@/auth"

export const GET = handle({
  realtime,
  middleware: async ({ request, channels }) => {
    const user = await currentUser(request)

    if (!user) {
      return new Response("Unauthorized", { status: 401 })
    }
  },
})

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Middleware API

The middleware function receives:
​
request
Request
The incoming HTTP Request object
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channels
string[]
default:"['default']"
The channels a user is attempting to connect to
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return
  • Return undefined or nothing to allow the connection
  • Return a Response object to block the connection with a custom error

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Authentication Patterns

Verify users can access specific channels:
api/realtime/route.ts
export const GET = handle({
  realtime,
  middleware: async ({ request, channels }) => {
    const user = await currentUser(request)

    for (const channel of channels) {
      if (channel === "default") {
        continue
      }

      if (!channel.startsWith(user.id)) {
        return new Response("You can only access your own channels", { status: 403 })
      }
    }
  },
})
Verify user sessions before allowing connections:
api/realtime/route.ts
import { getSession } from "@/auth"

export const GET = handle({
  realtime,
  middleware: async ({ request }) => {
    const session = await getSession(request)

    if (!session?.user) {
      return new Response("Please sign in", { status: 401 })
    }
  },
})
Control access based on user roles:
api/realtime/route.ts
export const GET = handle({
  realtime,
  middleware: async ({ request, channels }) => {
    const user = await currentUser(request)

    for (const channel of channels) {
      if (channel === "default") {
        continue
      }

      if (channel.startsWith("admin-") && user.role !== "admin") {
        return new Response("Admin access required", { status: 403 })
      }

      if (channel.startsWith("team-")) {
        const teamId = channel.replace("team-", "")
        const isMember = await checkTeamMembership(user.id, teamId)

        if (!isMember) {
          return new Response("Not a team member", { status: 403 })
        }
      }
    }
  },
})