diff --git a/.changelog/1199.feature.md b/.changelog/1199.feature.md
new file mode 100644
index 000000000..1c617a872
--- /dev/null
+++ b/.changelog/1199.feature.md
@@ -0,0 +1 @@
+`/v1/stats/tx_volume` Endpoint returns tx_volume for all layers
diff --git a/api/spec/v1.yaml b/api/spec/v1.yaml
index b72eca0aa..9c5bf2ba2 100644
--- a/api/spec/v1.yaml
+++ b/api/spec/v1.yaml
@@ -1650,6 +1650,26 @@ paths:
                 $ref: '#/components/schemas/RoflMarketInstanceList'
         <<: *common_error_responses
 
+  /stats/tx_volume:
+    get:
+      summary: |
+        Returns a timeline of the transaction volume at the chosen granularity
+        combined for all layers.
+      parameters:
+        - *limit
+        - *offset
+        - *window_size_seconds
+        - *window_step_seconds
+      responses:
+        '200':
+          description: |
+            A JSON object containing a list of TPS values for each interval.
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/TxVolumeList'
+        <<: *common_error_responses
+
   /{layer}/stats/tx_volume:
     get:
       summary: |
diff --git a/api/v1/strict_server.go b/api/v1/strict_server.go
index 1b07b02b4..8382e9954 100644
--- a/api/v1/strict_server.go
+++ b/api/v1/strict_server.go
@@ -228,13 +228,27 @@ func (srv *StrictServerImpl) GetConsensusProposalsProposalIdVotes(ctx context.Co
 	return apiTypes.GetConsensusProposalsProposalIdVotes200JSONResponse(*votes), nil
 }
 
+func (srv *StrictServerImpl) GetStatsTxVolume(ctx context.Context, request apiTypes.GetStatsTxVolumeRequestObject) (apiTypes.GetStatsTxVolumeResponseObject, error) {
+	params := apiTypes.GetLayerStatsTxVolumeParams{
+		WindowStepSeconds: request.Params.WindowStepSeconds,
+		WindowSizeSeconds: request.Params.WindowSizeSeconds,
+		Limit:             request.Params.Limit,
+		Offset:            request.Params.Offset,
+	}
+	volumeList, err := srv.dbClient.TxVolumes(ctx, nil, params)
+	if err != nil {
+		return nil, err
+	}
+	return apiTypes.GetStatsTxVolume200JSONResponse(*volumeList), nil
+}
+
 func (srv *StrictServerImpl) GetLayerStatsTxVolume(ctx context.Context, request apiTypes.GetLayerStatsTxVolumeRequestObject) (apiTypes.GetLayerStatsTxVolumeResponseObject, error) {
 	// Additional param validation.
 	if !request.Layer.IsValid() {
 		return nil, &apiTypes.InvalidParamFormatError{ParamName: "layer", Err: fmt.Errorf("not a valid enum value: %s", request.Layer)}
 	}
 
-	volumeList, err := srv.dbClient.TxVolumes(ctx, request.Layer, request.Params)
+	volumeList, err := srv.dbClient.TxVolumes(ctx, &request.Layer, request.Params)
 	if err != nil {
 		return nil, err
 	}
diff --git a/storage/client/client.go b/storage/client/client.go
index d558315ce..509343848 100644
--- a/storage/client/client.go
+++ b/storage/client/client.go
@@ -2913,7 +2913,7 @@ func (c *StorageClient) RuntimeRoflmarketInstances(ctx context.Context, runtime
 }
 
 // TxVolumes returns a list of transaction volumes per time window.
-func (c *StorageClient) TxVolumes(ctx context.Context, layer apiTypes.Layer, p apiTypes.GetLayerStatsTxVolumeParams) (*TxVolumeList, error) {
+func (c *StorageClient) TxVolumes(ctx context.Context, layer *apiTypes.Layer, p apiTypes.GetLayerStatsTxVolumeParams) (*TxVolumeList, error) {
 	var query string
 
 	switch {
@@ -2931,10 +2931,14 @@ func (c *StorageClient) TxVolumes(ctx context.Context, layer apiTypes.Layer, p a
 		return nil, fmt.Errorf("invalid window size parameters: %w", apiCommon.ErrBadRequest)
 	}
 
+	var l *common.Layer
+	if layer != nil {
+		l = common.Ptr(translateLayer(*layer))
+	}
 	rows, err := c.db.Query(
 		ctx,
 		query,
-		translateLayer(layer),
+		l,
 		p.Limit,
 		p.Offset,
 	)
diff --git a/storage/client/queries/queries.go b/storage/client/queries/queries.go
index 7d56a1cf4..8747337cd 100644
--- a/storage/client/queries/queries.go
+++ b/storage/client/queries/queries.go
@@ -1194,9 +1194,15 @@ const (
 
 	// FineTxVolumes returns the fine-grained query for 5-minute sampled tx volume windows.
 	FineTxVolumes = `
-		SELECT window_end, tx_volume
-		FROM stats.min5_tx_volume
-		WHERE layer = $1::text
+		SELECT
+			window_end,
+			SUM(tx_volume) AS tx_volume
+		FROM
+			stats.min5_tx_volume
+		WHERE
+			($1::text IS NULL OR layer = $1::text)
+		GROUP BY
+			window_end
 		ORDER BY
 			window_end DESC
 		LIMIT $2::bigint
@@ -1204,9 +1210,15 @@ const (
 
 	// FineDailyTxVolumes returns the query for daily tx volume windows.
 	FineDailyTxVolumes = `
-		SELECT window_end, tx_volume
-		FROM stats.daily_tx_volume
-		WHERE layer = $1::text
+		SELECT
+			window_end,
+			SUM(tx_volume) AS tx_volume
+		FROM
+			stats.daily_tx_volume
+		WHERE
+			($1::text IS NULL OR layer = $1::text)
+		GROUP BY
+			window_end
 		ORDER BY
 			window_end DESC
 		LIMIT $2::bigint
@@ -1214,9 +1226,15 @@ const (
 
 	// DailyTxVolumes returns the query for daily sampled daily tx volume windows.
 	DailyTxVolumes = `
-		SELECT window_end, tx_volume
-		FROM stats.daily_tx_volume
-		WHERE (layer = $1::text AND (window_end AT TIME ZONE 'UTC')::time = '00:00:00')
+		SELECT
+			window_end,
+			SUM(tx_volume) AS tx_volume
+		FROM
+			stats.daily_tx_volume
+		WHERE
+			($1::text IS NULL OR layer = $1::text) AND (window_end AT TIME ZONE 'UTC')::time = '00:00:00'
+		GROUP BY
+			window_end
 		ORDER BY
 			window_end DESC
 		LIMIT $2::bigint
diff --git a/tests/e2e_regression/common_test_cases.sh b/tests/e2e_regression/common_test_cases.sh
index 1d91265b4..7382523c5 100644
--- a/tests/e2e_regression/common_test_cases.sh
+++ b/tests/e2e_regression/common_test_cases.sh
@@ -41,6 +41,7 @@ commonTestCases=(
   'accounts_extraneous_key            /v1/consensus/accounts?foo=bar'
 
   'recent_blocks                      /v1/recent_blocks'
+  'tx_volume_all_layers               /v1/stats/tx_volume'
 
   'blocks                             /v1/consensus/blocks'
   'bad_account                        /v1/consensus/accounts/oasis1aaaaaaa'
diff --git a/tests/e2e_regression/damask/expected/tx_volume_all_layers.body b/tests/e2e_regression/damask/expected/tx_volume_all_layers.body
new file mode 100644
index 000000000..792a4bf1e
--- /dev/null
+++ b/tests/e2e_regression/damask/expected/tx_volume_all_layers.body
@@ -0,0 +1,4 @@
+{
+  "window_size_seconds": 86400,
+  "windows": []
+}
diff --git a/tests/e2e_regression/damask/expected/tx_volume_all_layers.headers b/tests/e2e_regression/damask/expected/tx_volume_all_layers.headers
new file mode 100644
index 000000000..1cce01c2d
--- /dev/null
+++ b/tests/e2e_regression/damask/expected/tx_volume_all_layers.headers
@@ -0,0 +1,6 @@
+HTTP/1.1 200 OK
+Content-Type: application/json
+Vary: Origin
+Date: UNINTERESTING
+Content-Length: UNINTERESTING
+
diff --git a/tests/e2e_regression/eden/expected/tx_volume_all_layers.body b/tests/e2e_regression/eden/expected/tx_volume_all_layers.body
new file mode 100644
index 000000000..792a4bf1e
--- /dev/null
+++ b/tests/e2e_regression/eden/expected/tx_volume_all_layers.body
@@ -0,0 +1,4 @@
+{
+  "window_size_seconds": 86400,
+  "windows": []
+}
diff --git a/tests/e2e_regression/eden/expected/tx_volume_all_layers.headers b/tests/e2e_regression/eden/expected/tx_volume_all_layers.headers
new file mode 100644
index 000000000..1cce01c2d
--- /dev/null
+++ b/tests/e2e_regression/eden/expected/tx_volume_all_layers.headers
@@ -0,0 +1,6 @@
+HTTP/1.1 200 OK
+Content-Type: application/json
+Vary: Origin
+Date: UNINTERESTING
+Content-Length: UNINTERESTING
+
diff --git a/tests/e2e_regression/eden_2025/expected/tx_volume_all_layers.body b/tests/e2e_regression/eden_2025/expected/tx_volume_all_layers.body
new file mode 100644
index 000000000..792a4bf1e
--- /dev/null
+++ b/tests/e2e_regression/eden_2025/expected/tx_volume_all_layers.body
@@ -0,0 +1,4 @@
+{
+  "window_size_seconds": 86400,
+  "windows": []
+}
diff --git a/tests/e2e_regression/eden_2025/expected/tx_volume_all_layers.headers b/tests/e2e_regression/eden_2025/expected/tx_volume_all_layers.headers
new file mode 100644
index 000000000..1cce01c2d
--- /dev/null
+++ b/tests/e2e_regression/eden_2025/expected/tx_volume_all_layers.headers
@@ -0,0 +1,6 @@
+HTTP/1.1 200 OK
+Content-Type: application/json
+Vary: Origin
+Date: UNINTERESTING
+Content-Length: UNINTERESTING
+
diff --git a/tests/e2e_regression/eden_testnet_2025/expected/tx_volume_all_layers.body b/tests/e2e_regression/eden_testnet_2025/expected/tx_volume_all_layers.body
new file mode 100644
index 000000000..792a4bf1e
--- /dev/null
+++ b/tests/e2e_regression/eden_testnet_2025/expected/tx_volume_all_layers.body
@@ -0,0 +1,4 @@
+{
+  "window_size_seconds": 86400,
+  "windows": []
+}
diff --git a/tests/e2e_regression/eden_testnet_2025/expected/tx_volume_all_layers.headers b/tests/e2e_regression/eden_testnet_2025/expected/tx_volume_all_layers.headers
new file mode 100644
index 000000000..1cce01c2d
--- /dev/null
+++ b/tests/e2e_regression/eden_testnet_2025/expected/tx_volume_all_layers.headers
@@ -0,0 +1,6 @@
+HTTP/1.1 200 OK
+Content-Type: application/json
+Vary: Origin
+Date: UNINTERESTING
+Content-Length: UNINTERESTING
+