fix(mcp): add Mcp-Session-Id header to E2E test script

Streamable HTTP transport requires session ID on all requests after
initialization. Capture the header from the initialize response and
pass it on all subsequent JSON-RPC calls.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: 2 people

scripts/mcp-e2e-test.sh

@@ -32,34 +32,51 @@ if [ "$READY" != "true" ]; then
   exit 1
 fi
 
-# Helper: send a JSON-RPC request and extract the result field.
-rpc() {
-  local id="$1"
-  local method="$2"
-  local params="$3"
-  curl -sf -X POST "$ADDR" \
-    -H "Content-Type: application/json" \
-    -H "Accept: application/json" \
-    -d "{\"jsonrpc\":\"2.0\",\"id\":${id},\"method\":\"${method}\",\"params\":${params}}"
-}
-
-# --- Step 1: Initialize session ---
+# --- Step 1: Initialize session and capture Mcp-Session-Id ---
 echo "=== Initializing MCP session ==="
-INIT=$(rpc 1 "initialize" '{"protocolVersion":"2025-11-25","clientInfo":{"name":"e2e-test","version":"0.1"},"capabilities":{}}')
+INIT_HEADERS=$(mktemp)
+INIT=$(curl -sf -X POST "$ADDR" \
+  -H "Content-Type: application/json" \
+  -H "Accept: application/json" \
+  -D "$INIT_HEADERS" \
+  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2025-11-25","clientInfo":{"name":"e2e-test","version":"0.1"},"capabilities":{}}}')
+
+SESSION_ID=$(grep -i 'Mcp-Session-Id' "$INIT_HEADERS" | tr -d '\r' | awk '{print $2}')
+rm -f "$INIT_HEADERS"
+
+if [ -z "$SESSION_ID" ]; then
+  echo "FAIL: initialize did not return Mcp-Session-Id header"
+  echo "Response: $INIT"
+  exit 1
+fi
+
 SERVER_NAME=$(echo "$INIT" | jq -r '.result.serverInfo.name // empty')
 if [ -z "$SERVER_NAME" ]; then
   echo "FAIL: initialize did not return serverInfo.name"
   echo "Response: $INIT"
   exit 1
 fi
-echo "PASS: initialized — server=$SERVER_NAME"
+echo "PASS: initialized — server=$SERVER_NAME, session=$SESSION_ID"
 
-# Send initialized notification (no id, no response expected)
+# Send initialized notification (requires session ID)
 curl -sf -X POST "$ADDR" \
   -H "Content-Type: application/json" \
+  -H "Mcp-Session-Id: $SESSION_ID" \
   -d '{"jsonrpc":"2.0","method":"notifications/initialized"}' \
   -o /dev/null 2>/dev/null || true
 
+# Helper: send a JSON-RPC request with session ID.
+rpc() {
+  local id="$1"
+  local method="$2"
+  local params="$3"
+  curl -sf -X POST "$ADDR" \
+    -H "Content-Type: application/json" \
+    -H "Accept: application/json" \
+    -H "Mcp-Session-Id: $SESSION_ID" \
+    -d "{\"jsonrpc\":\"2.0\",\"id\":${id},\"method\":\"${method}\",\"params\":${params}}"
+}
+
 # --- Step 2: List tools ---
 echo "=== Listing tools ==="
 TOOLS=$(rpc 2 "tools/list" '{}')