diff --git a/src/app/api/mcp/[transport]/route.ts b/src/app/api/mcp/[transport]/route.ts
index 1041dcc7c..2fd2660e8 100644
--- a/src/app/api/mcp/[transport]/route.ts
+++ b/src/app/api/mcp/[transport]/route.ts
@@ -49,6 +49,17 @@ const QUERY_PROM_ALLOWED_METRIC_PREFIXES = [
   "bridge_output",
   "bridge_estimated_time",
   "bridge_quote_success",
+  // Bridge execution bench (#261): real on-chain settlement + realized cost
+  "bridge_execution_latency_ms",
+  "bridge_e2e_latency_ms",
+  "bridge_success_total",
+  "bridge_reverts_total",
+  "bridge_refunds_total",
+  "bridge_stuck_total",
+  "bridge_refund_latency_ms",
+  "bridge_realized_output_usd",
+  "bridge_quote_slippage_usd",
+  "bridge_exec_gas_usd",
   // L1 finality + L2 block time
   "l1_finality_",
   "l2_block_time_",
@@ -349,6 +360,9 @@ const mcpHandler = createMcpHandler(
           "Allowed metric namespaces (one prefix per OCB bench family):",
           "  head_lag_seconds (aggregator latency)",
           "  bridge_quote_latency_ms*, bridge_cost*, bridge_fees*, bridge_fix_fee*,",
+          "  bridge_execution_latency_ms*, bridge_e2e_latency_ms*, bridge_success_total,",
+          "    bridge_reverts_total, bridge_refunds_total, bridge_stuck_total,",
+          "    bridge_refund_latency_ms*, bridge_realized_output_usd, bridge_quote_slippage_usd, bridge_exec_gas_usd,",
           "    bridge_gas*, bridge_output*, bridge_estimated_time*, bridge_quote_success",
           "  l1_finality_*, l2_block_time_*",
           "  metadata_coverage_*, metadata_api_latency_*, network_coverage_*,",