diff --git a/.github/workflows/e2e.yml b/.github/workflows/e2e.yml
index 72504a5..169ccca 100644
--- a/.github/workflows/e2e.yml
+++ b/.github/workflows/e2e.yml
@@ -37,6 +37,10 @@ jobs:
       - name: Typecheck E2E suite
         run: pnpm typecheck:e2e
 
+      # The edge function imports the packed library artifact — vendor it
+      # into supabase/functions before the stack starts (see e2e/README.md).
+      - run: pnpm vendor:e2e
+
       - name: Start local Supabase stack
         run: supabase start
         working-directory: e2e
diff --git a/.gitignore b/.gitignore
index 245a4e7..ccfb676 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,4 @@ api-docs
 !.env.example
 .DS_Store
 .idea
+e2e/supabase/functions/_vendor
diff --git a/e2e/README.md b/e2e/README.md
index 2a34486..7e64101 100644
--- a/e2e/README.md
+++ b/e2e/README.md
@@ -3,7 +3,8 @@
 End-to-end coverage for `@supabase/server`: real GoTrue-issued JWTs, real JWKS
 validation over HTTP, real Supabase client operations — across all four
 adapters (Hono, H3, Elysia, NestJS) plus the core `withSupabase` fetch
-wrapper, the programming model Supabase Edge Functions use.
+wrapper on Node and on the real Deno edge runtime, the programming model
+Supabase Edge Functions use.
 
 Unlike the unit/integration tests (mocked env, `jwks: null`), this suite:
 
@@ -21,6 +22,7 @@ Unlike the unit/integration tests (mocked env, `jwks: null`), this suite:
 
 ```sh
 pnpm build                  # e2e imports from dist/
+pnpm vendor:e2e             # packs dist/ for the edge function's import map
 cd e2e && supabase start    # local stack (Docker) on ports 5433x
 cd .. && pnpm gen:env       # writes e2e/.env from `supabase status`
 pnpm test:e2e
@@ -38,8 +40,17 @@ Run a single adapter with `pnpm test:e2e h3`.
   `GET /all-notes` (user, admin client with no filter — proves the admin
   client is not scoped to the caller)
 - `apps/core/app.ts` — same surface on the core `withSupabase(config, handler)`
-  fetch wrapper (no adapter) — what an Edge Function deploys. A real Deno
-  `supabase functions serve` e2e is tracked as a follow-up issue.
+  fetch wrapper (no adapter) — what an Edge Function deploys, running on Node.
+- `supabase/functions/server-e2e/` — the same surface again, but on the real
+  Deno edge runtime, served by `supabase start` through the Kong gateway and
+  covered by `edge.e2e.ts`. Imports the library from a vendored `pnpm pack`
+  artifact (`pnpm vendor:e2e` → `functions/_vendor/`, gitignored) — the exact
+  bytes `npm publish` ships. `verify_jwt = false` in `supabase/config.toml`
+  keeps the gateway's JWT pre-check out of the way so the middleware's own
+  401 behavior is what the scenarios exercise. Needs Supabase CLI ≥ 2.109 —
+  older local edge runtimes don't inject the new-key env
+  (`SUPABASE_PUBLISHABLE_KEYS` / `SUPABASE_SECRET_KEYS` / `SUPABASE_JWKS`)
+  the library reads.
 - `scenarios.ts` — the single scenario set run against every adapter
 - `setup/global-setup.ts` — checks the stack is up, signs in two test users,
   provides their tokens to the tests
diff --git a/e2e/apps/core/app.ts b/e2e/apps/core/app.ts
index fe623fa..81688ba 100644
--- a/e2e/apps/core/app.ts
+++ b/e2e/apps/core/app.ts
@@ -1,8 +1,8 @@
 // Minimal app on the CORE withSupabase(config, handler) fetch wrapper — no
 // framework adapter. This is the exact programming model Supabase Edge
 // Functions use (`Deno.serve(withSupabase(...))`); here the same handler runs
-// behind node:http. A real Deno `supabase functions serve` e2e is tracked
-// separately.
+// behind node:http. The same surface runs on the real Deno edge runtime in
+// e2e/supabase/functions/server-e2e/ — keep the two in sync.
 //
 // The core wrapper has no router, so routes are dispatched on pathname and
 // each auth mode gets its own wrapped handler.
diff --git a/e2e/edge.e2e.ts b/e2e/edge.e2e.ts
new file mode 100644
index 0000000..9b11184
--- /dev/null
+++ b/e2e/edge.e2e.ts
@@ -0,0 +1,35 @@
+import { beforeAll } from 'vitest'
+
+import { runAdapterScenarios } from './scenarios.ts'
+
+// Served by the local stack's edge runtime (`supabase start` with
+// [edge_runtime] enabled in e2e/supabase/config.toml) and reached through
+// the Kong gateway — unlike the app suites, there is no local server to
+// start. vitest-setup.ts has already loaded e2e/.env by the time this
+// module is evaluated.
+const baseUrl = `${process.env.SUPABASE_URL}/functions/v1/server-e2e`
+
+beforeAll(async () => {
+  // The first invocation boots the Deno worker and resolves its npm:
+  // imports — poll /health so the cold start is spent here, not inside the
+  // first scenario's 15s timeout.
+  const deadline = Date.now() + 90_000
+  for (;;) {
+    try {
+      const res = await fetch(`${baseUrl}/health`)
+      if (res.ok) return
+    } catch {
+      // gateway not answering yet
+    }
+    if (Date.now() > deadline) {
+      throw new Error(
+        `edge function at ${baseUrl} not ready after 90s — is the stack ` +
+          'running with [edge_runtime] enabled and the vendor step done? ' +
+          '(pnpm vendor:e2e, then supabase start in e2e/)',
+      )
+    }
+    await new Promise((resolve) => setTimeout(resolve, 1000))
+  }
+}, 120_000)
+
+runAdapterScenarios('edge', baseUrl)
diff --git a/e2e/scripts/vendor-pack.sh b/e2e/scripts/vendor-pack.sh
new file mode 100644
index 0000000..eefd5ea
--- /dev/null
+++ b/e2e/scripts/vendor-pack.sh
@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+# Vendors the packed library into the edge functions directory. The edge
+# runtime container mounts only e2e/supabase/functions/, so the function
+# cannot import the repo-root dist/ directly. `pnpm pack` produces the exact
+# artifact `npm publish` would ship — the suite keeps testing built output.
+# Requires `pnpm build` first.
+set -euo pipefail
+
+repo_root="$(cd "$(dirname "$0")/../.." && pwd)"
+vendor_dir="$repo_root/e2e/supabase/functions/_vendor"
+
+if [ ! -f "$repo_root/dist/index.mjs" ]; then
+  echo "dist/index.mjs not found — run \`pnpm build\` first" >&2
+  exit 1
+fi
+
+rm -rf "$vendor_dir"
+mkdir -p "$vendor_dir"
+
+tarball="$(pnpm --dir "$repo_root" pack --pack-destination "$vendor_dir" | tail -n1)"
+tar -xzf "$tarball" -C "$vendor_dir"
+rm "$tarball"
+
+# Workaround for a Supabase CLI regression (JS rewrite, >= 2.110): its
+# functions import scanner also picks specifiers out of JSDoc @example
+# comments, resolves subpaths by concatenating onto the bare import-map key
+# ('@supabase/server' + '/core' -> .../index.mjs/core), and aborts
+# `supabase start` on the resulting ENOTDIR. Neutralize subpath specifiers
+# on comment lines only (dist code imports use double quotes; JSDoc
+# examples use single quotes) — runtime code is untouched. Remove once the
+# CLI treats comment text / not-found paths correctly.
+find "$vendor_dir/package/dist" -type f \( -name '*.mjs' -o -name '*.cjs' -o -name '*.mts' -o -name '*.cts' \) \
+  -exec sed -i.bak "/^[[:space:]]*\*/ s|'@supabase/server/[^']*'|'@supabase/server'|g" {} + \
+  && find "$vendor_dir/package/dist" -name '*.bak' -delete
+
+echo "Vendored $(basename "$tarball") -> ${vendor_dir#"$repo_root/"}/package"
diff --git a/e2e/supabase/config.toml b/e2e/supabase/config.toml
index 8bf0120..92ad72d 100644
--- a/e2e/supabase/config.toml
+++ b/e2e/supabase/config.toml
@@ -34,8 +34,15 @@ enabled = false
 [analytics]
 enabled = false
 
+# Enabled for the server-e2e function (SDK-1280). Everything else above
+# stays disabled to keep `supabase start` fast in CI.
 [edge_runtime]
-enabled = false
+enabled = true
+
+# The middleware's own 401 behavior is under test — the gateway's JWT
+# pre-check must not answer first.
+[functions.server-e2e]
+verify_jwt = false
 
 [auth]
 enabled = true
diff --git a/e2e/supabase/functions/server-e2e/deno.json b/e2e/supabase/functions/server-e2e/deno.json
new file mode 100644
index 0000000..4b208a8
--- /dev/null
+++ b/e2e/supabase/functions/server-e2e/deno.json
@@ -0,0 +1,9 @@
+{
+  "imports": {
+    "@supabase/server": "../_vendor/package/dist/index.mjs",
+    "@supabase/supabase-js": "npm:@supabase/supabase-js@2",
+    "@supabase/supabase-js/cors": "npm:@supabase/supabase-js@2/cors",
+    "@supabase/middleware": "npm:@supabase/middleware@0.3.0",
+    "jose": "npm:jose@6"
+  }
+}
diff --git a/e2e/supabase/functions/server-e2e/index.ts b/e2e/supabase/functions/server-e2e/index.ts
new file mode 100644
index 0000000..6c9d5f4
--- /dev/null
+++ b/e2e/supabase/functions/server-e2e/index.ts
@@ -0,0 +1,82 @@
+// The e2e edge function: the same route surface as e2e/apps/core/app.ts —
+// the same core withSupabase(config, handler) wrapper — but on the real
+// Deno edge runtime behind the local gateway. Kept self-contained: the
+// runtime mounts only supabase/functions/, so the shared e2e helpers are
+// out of reach and the small dispatch + queries are duplicated by design.
+// Keep the two files in sync when the route surface changes.
+import { withSupabase } from '@supabase/server'
+
+const COLUMNS = 'id, user_id, body'
+
+// The gateway forwards /functions/v1/server-e2e/<path> with the function
+// name still in the pathname; some CLI versions strip it. Handle both.
+function route(req: Request): string {
+  const { pathname } = new URL(req.url)
+  return pathname.replace(/^\/server-e2e/, '') || '/'
+}
+
+const userHandler = withSupabase({ auth: 'user' }, async (req, ctx) => {
+  const pathname = route(req)
+  const { supabase, supabaseAdmin, userClaims } = ctx
+
+  if (pathname === '/me') return Response.json({ userClaims })
+
+  if (pathname === '/my-notes') {
+    // No WHERE clause — the caller's JWT reaches PostgREST through
+    // ctx.supabase and the RLS policy alone scopes the rows.
+    const { data, error } = await supabase
+      .from('notes')
+      .select(COLUMNS)
+      .order('created_at', { ascending: true })
+    if (error) throw new Error(`list own notes failed: ${error.message}`)
+    return Response.json(data)
+  }
+
+  if (pathname === '/all-notes') {
+    // Admin client, no filter — proves it is not scoped to the caller.
+    const { data, error } = await supabaseAdmin
+      .from('notes')
+      .select(COLUMNS)
+      .order('created_at', { ascending: true })
+    if (error) throw new Error(`list all notes failed: ${error.message}`)
+    return Response.json(data)
+  }
+
+  if (pathname === '/notes' && req.method === 'GET') {
+    const { data, error } = await supabaseAdmin
+      .from('notes')
+      .select(COLUMNS)
+      .eq('user_id', userClaims!.id)
+      .order('created_at', { ascending: true })
+    if (error) throw new Error(`list notes failed: ${error.message}`)
+    return Response.json(data)
+  }
+
+  if (pathname === '/notes' && req.method === 'POST') {
+    const { body } = (await req.json()) as { body?: string }
+    if (!body) {
+      return Response.json({ error: 'body required' }, { status: 400 })
+    }
+    const { data, error } = await supabaseAdmin
+      .from('notes')
+      .insert({ user_id: userClaims!.id, body })
+      .select(COLUMNS)
+      .single()
+    if (error) throw new Error(`insert note failed: ${error.message}`)
+    return Response.json(data, { status: 201 })
+  }
+
+  return Response.json({ error: 'not found' }, { status: 404 })
+})
+
+const optionalHandler = withSupabase(
+  { auth: ['user', 'none'] },
+  async (_req, ctx) => Response.json({ userClaims: ctx.userClaims }),
+)
+
+Deno.serve((req) => {
+  const pathname = route(req)
+  if (pathname === '/health') return Response.json({ status: 'ok' })
+  if (pathname === '/me-optional') return optionalHandler(req)
+  return userHandler(req)
+})
diff --git a/e2e/tsconfig.json b/e2e/tsconfig.json
index 62b67f1..3608c24 100644
--- a/e2e/tsconfig.json
+++ b/e2e/tsconfig.json
@@ -12,5 +12,6 @@
     "emitDecoratorMetadata": true,
     "types": ["node"]
   },
-  "include": ["."]
+  "include": ["."],
+  "exclude": ["supabase/functions"]
 }
diff --git a/package.json b/package.json
index 4cd6eed..08a208a 100644
--- a/package.json
+++ b/package.json
@@ -158,7 +158,8 @@
     "test:e2e": "vitest run --project e2e",
     "test:watch": "vitest --project unit --project nestjs",
     "typecheck": "tsc --noEmit && tsc --noEmit -p src/adapters/nestjs",
-    "typecheck:e2e": "tsc --noEmit -p e2e"
+    "typecheck:e2e": "tsc --noEmit -p e2e",
+    "vendor:e2e": "bash e2e/scripts/vendor-pack.sh"
   },
   "simple-git-hooks": {
     "pre-commit": "pnpm pretty-quick --staged",