diff --git a/backend/internal/handler/openai_chat_completions.go b/backend/internal/handler/openai_chat_completions.go
index de384710..c85cd35d 100644
--- a/backend/internal/handler/openai_chat_completions.go
+++ b/backend/internal/handler/openai_chat_completions.go
@@ -143,6 +143,7 @@ func (h *OpenAIGatewayHandler) ChatCompletions(c *gin.Context) {
 				zap.Int("excluded_account_count", len(failedAccountIDs)),
 			)
 			if len(failedAccountIDs) == 0 {
+				markOpsRoutingCapacityLimitedIfNoAvailable(c, err)
 				h.handleStreamingAwareError(c, http.StatusServiceUnavailable, "api_error", "Service temporarily unavailable", streamStarted)
 				return
 			} else {
@@ -155,6 +156,7 @@ func (h *OpenAIGatewayHandler) ChatCompletions(c *gin.Context) {
 			}
 		}
 		if selection == nil || selection.Account == nil {
+			markOpsRoutingCapacityLimited(c)
 			h.handleStreamingAwareError(c, http.StatusServiceUnavailable, "api_error", "No available accounts", streamStarted)
 			return
 		}
diff --git a/backend/internal/handler/openai_gateway_handler.go b/backend/internal/handler/openai_gateway_handler.go
index 6b07b7ba..dcd737af 100644
--- a/backend/internal/handler/openai_gateway_handler.go
+++ b/backend/internal/handler/openai_gateway_handler.go
@@ -282,6 +282,7 @@ func (h *OpenAIGatewayHandler) Responses(c *gin.Context) {
 				zap.Int("excluded_account_count", len(failedAccountIDs)),
 			)
 			if len(failedAccountIDs) == 0 {
+				markOpsRoutingCapacityLimitedIfNoAvailable(c, err)
 				if errors.Is(err, service.ErrNoAvailableCompactAccounts) {
 					h.handleStreamingAwareError(c, http.StatusServiceUnavailable, "compact_not_supported", "No available OpenAI accounts support /responses/compact", streamStarted)
 					return
@@ -297,6 +298,7 @@ func (h *OpenAIGatewayHandler) Responses(c *gin.Context) {
 			return
 		}
 		if selection == nil || selection.Account == nil {
+			markOpsRoutingCapacityLimited(c)
 			h.handleStreamingAwareError(c, http.StatusServiceUnavailable, "api_error", "No available accounts", streamStarted)
 			return
 		}
@@ -677,6 +679,7 @@ func (h *OpenAIGatewayHandler) Messages(c *gin.Context) {
 			)
 			if len(failedAccountIDs) == 0 {
 				if err != nil {
+					markOpsRoutingCapacityLimitedIfNoAvailable(c, err)
 					h.anthropicStreamingAwareError(c, http.StatusServiceUnavailable, "api_error", "Service temporarily unavailable", streamStarted)
 					return
 				}
@@ -690,6 +693,7 @@ func (h *OpenAIGatewayHandler) Messages(c *gin.Context) {
 			}
 		}
 		if selection == nil || selection.Account == nil {
+			markOpsRoutingCapacityLimited(c)
 			h.anthropicStreamingAwareError(c, http.StatusServiceUnavailable, "api_error", "No available accounts", streamStarted)
 			return
 		}
@@ -992,6 +996,7 @@ func (h *OpenAIGatewayHandler) acquireResponsesAccountSlot(
 	reqLog *zap.Logger,
 ) (func(), bool) {
 	if selection == nil || selection.Account == nil {
+		markOpsRoutingCapacityLimited(c)
 		h.handleStreamingAwareError(c, http.StatusServiceUnavailable, "api_error", "No available accounts", *streamStarted)
 		return nil, false
 	}
@@ -1002,6 +1007,7 @@ func (h *OpenAIGatewayHandler) acquireResponsesAccountSlot(
 		return wrapReleaseOnDone(ctx, selection.ReleaseFunc), true
 	}
 	if selection.WaitPlan == nil {
+		markOpsRoutingCapacityLimited(c)
 		h.handleStreamingAwareError(c, http.StatusServiceUnavailable, "api_error", "No available accounts", *streamStarted)
 		return nil, false
 	}
diff --git a/backend/internal/handler/openai_images.go b/backend/internal/handler/openai_images.go
index 08a6b6e8..be19a035 100644
--- a/backend/internal/handler/openai_images.go
+++ b/backend/internal/handler/openai_images.go
@@ -157,6 +157,7 @@ func (h *OpenAIGatewayHandler) Images(c *gin.Context) {
 				zap.Int("excluded_account_count", len(failedAccountIDs)),
 			)
 			if len(failedAccountIDs) == 0 {
+				markOpsRoutingCapacityLimitedIfNoAvailable(c, err)
 				h.handleStreamingAwareError(c, http.StatusServiceUnavailable, "api_error", "No available compatible accounts", streamStarted)
 				return
 			}
@@ -168,6 +169,7 @@ func (h *OpenAIGatewayHandler) Images(c *gin.Context) {
 			return
 		}
 		if selection == nil || selection.Account == nil {
+			markOpsRoutingCapacityLimited(c)
 			h.handleStreamingAwareError(c, http.StatusServiceUnavailable, "api_error", "No available compatible accounts", streamStarted)
 			return
 		}