diff --git a/mintlify/openapi.yaml b/mintlify/openapi.yaml
index 47ae971f..a0caaf16 100644
--- a/mintlify/openapi.yaml
+++ b/mintlify/openapi.yaml
@@ -3,7 +3,7 @@ info:
   title: Grid API
   description: |
     API for managing global payments on the open Money Grid. Built by Lightspark. See the full documentation at https://docs.lightspark.com/.
-  version: '2026-06-25'
+  version: '2026-06-29'
   contact:
     name: Lightspark Support
     email: support@lightspark.com
@@ -17176,6 +17176,13 @@ components:
         - FUNDING_AMOUNT_MISMATCH
         - COUNTERPARTY_POST_TX_FAILED
       description: Reason for failure of an outgoing transaction. This is used to provide more context on why a transaction failed. If the transaction is not in a failed state, this field is omitted.
+    RailSelectionMode:
+      type: string
+      enum:
+        - AUTO
+        - MANUAL
+      description: How the payment rail was chosen — MANUAL when the platform specified a paymentRail on the destination, AUTO when Lightspark selects it.
+      example: AUTO
     OutgoingTransaction:
       title: Outgoing Transaction
       allOf:
@@ -17248,6 +17255,27 @@ components:
             failureReason:
               $ref: '#/components/schemas/OutgoingTransactionFailureReason'
               description: If the transaction failed, this field provides the reason for failure.
+            paymentRail:
+              anyOf:
+                - $ref: '#/components/schemas/PaymentRail'
+                - type: 'null'
+              description: The payment rail used to settle this transaction (e.g. ACH, WIRE, NEFT, FASTER_PAYMENTS). Uses the same values as the PaymentRail sent on quote requests. Null when no external rail is used (e.g. instant or intra-network transfers, or non-direct-destination transactions) or before a rail is resolved.
+            railSelectionMode:
+              anyOf:
+                - $ref: '#/components/schemas/RailSelectionMode'
+                - type: 'null'
+              description: How the rail was chosen — MANUAL when the platform specified a paymentRail on the destination, AUTO when Lightspark selects it. Null when no rail is resolved.
+            expectedSettlementAt:
+              type:
+                - string
+                - 'null'
+              format: date-time
+              description: Expected settlement time at the beneficiary. Null for instant rails (settlement is immediate) and before a rail with deferred settlement is resolved.
+            settlementTimelineSeconds:
+              type:
+                - integer
+                - 'null'
+              description: Expected number of seconds from quote creation to settlement. Null when not yet known.
     CardTransactionStatus:
       type: string
       enum:
diff --git a/mintlify/ramps/platform-tools/webhooks.mdx b/mintlify/ramps/platform-tools/webhooks.mdx
index d782d4cc..db4bcff8 100644
--- a/mintlify/ramps/platform-tools/webhooks.mdx
+++ b/mintlify/ramps/platform-tools/webhooks.mdx
@@ -37,7 +37,11 @@ Grid sends webhooks for key events in the ramp lifecycle:
       "customerId": "Customer:019542f5-b3e7-1d02-0000-000000000001",
       "settledAt": "2025-10-03T15:02:30Z",
       "exchangeRate": 9.5,
-      "quoteId": "Quote:019542f5-b3e7-1d02-0000-000000000006"
+      "quoteId": "Quote:019542f5-b3e7-1d02-0000-000000000006",
+      "paymentRail": "ACH",
+      "railSelectionMode": "AUTO",
+      "expectedSettlementAt": "2025-10-04T15:00:00Z",
+      "settlementTimelineSeconds": 86400
     }
   }
   ```
diff --git a/openapi.yaml b/openapi.yaml
index 47ae971f..a0caaf16 100644
--- a/openapi.yaml
+++ b/openapi.yaml
@@ -3,7 +3,7 @@ info:
   title: Grid API
   description: |
     API for managing global payments on the open Money Grid. Built by Lightspark. See the full documentation at https://docs.lightspark.com/.
-  version: '2026-06-25'
+  version: '2026-06-29'
   contact:
     name: Lightspark Support
     email: support@lightspark.com
@@ -17176,6 +17176,13 @@ components:
         - FUNDING_AMOUNT_MISMATCH
         - COUNTERPARTY_POST_TX_FAILED
       description: Reason for failure of an outgoing transaction. This is used to provide more context on why a transaction failed. If the transaction is not in a failed state, this field is omitted.
+    RailSelectionMode:
+      type: string
+      enum:
+        - AUTO
+        - MANUAL
+      description: How the payment rail was chosen — MANUAL when the platform specified a paymentRail on the destination, AUTO when Lightspark selects it.
+      example: AUTO
     OutgoingTransaction:
       title: Outgoing Transaction
       allOf:
@@ -17248,6 +17255,27 @@ components:
             failureReason:
               $ref: '#/components/schemas/OutgoingTransactionFailureReason'
               description: If the transaction failed, this field provides the reason for failure.
+            paymentRail:
+              anyOf:
+                - $ref: '#/components/schemas/PaymentRail'
+                - type: 'null'
+              description: The payment rail used to settle this transaction (e.g. ACH, WIRE, NEFT, FASTER_PAYMENTS). Uses the same values as the PaymentRail sent on quote requests. Null when no external rail is used (e.g. instant or intra-network transfers, or non-direct-destination transactions) or before a rail is resolved.
+            railSelectionMode:
+              anyOf:
+                - $ref: '#/components/schemas/RailSelectionMode'
+                - type: 'null'
+              description: How the rail was chosen — MANUAL when the platform specified a paymentRail on the destination, AUTO when Lightspark selects it. Null when no rail is resolved.
+            expectedSettlementAt:
+              type:
+                - string
+                - 'null'
+              format: date-time
+              description: Expected settlement time at the beneficiary. Null for instant rails (settlement is immediate) and before a rail with deferred settlement is resolved.
+            settlementTimelineSeconds:
+              type:
+                - integer
+                - 'null'
+              description: Expected number of seconds from quote creation to settlement. Null when not yet known.
     CardTransactionStatus:
       type: string
       enum:
diff --git a/openapi/components/schemas/common/RailSelectionMode.yaml b/openapi/components/schemas/common/RailSelectionMode.yaml
new file mode 100644
index 00000000..a5ff3a84
--- /dev/null
+++ b/openapi/components/schemas/common/RailSelectionMode.yaml
@@ -0,0 +1,8 @@
+type: string
+enum:
+  - AUTO
+  - MANUAL
+description: >-
+  How the payment rail was chosen — MANUAL when the platform specified a
+  paymentRail on the destination, AUTO when Lightspark selects it.
+example: AUTO
diff --git a/openapi/components/schemas/transactions/OutgoingTransaction.yaml b/openapi/components/schemas/transactions/OutgoingTransaction.yaml
index 5b51c745..b6ff7eb1 100644
--- a/openapi/components/schemas/transactions/OutgoingTransaction.yaml
+++ b/openapi/components/schemas/transactions/OutgoingTransaction.yaml
@@ -73,3 +73,37 @@ allOf:
       failureReason:
         $ref: ./OutgoingTransactionFailureReason.yaml
         description: If the transaction failed, this field provides the reason for failure.
+      paymentRail:
+        anyOf:
+          - $ref: ../common/PaymentRail.yaml
+          - type: 'null'
+        description: >-
+          The payment rail used to settle this transaction (e.g. ACH, WIRE,
+          NEFT, FASTER_PAYMENTS). Uses the same values as the PaymentRail sent
+          on quote requests. Null when no external rail is used (e.g. instant
+          or intra-network transfers, or non-direct-destination transactions)
+          or before a rail is resolved.
+      railSelectionMode:
+        anyOf:
+          - $ref: ../common/RailSelectionMode.yaml
+          - type: 'null'
+        description: >-
+          How the rail was chosen — MANUAL when the platform specified a
+          paymentRail on the destination, AUTO when Lightspark selects it. Null
+          when no rail is resolved.
+      expectedSettlementAt:
+        type:
+          - string
+          - 'null'
+        format: date-time
+        description: >-
+          Expected settlement time at the beneficiary. Null for instant rails
+          (settlement is immediate) and before a rail with deferred settlement
+          is resolved.
+      settlementTimelineSeconds:
+        type:
+          - integer
+          - 'null'
+        description: >-
+          Expected number of seconds from quote creation to settlement. Null
+          when not yet known.
diff --git a/openapi/openapi.yaml b/openapi/openapi.yaml
index dbd09c84..674dd22a 100644
--- a/openapi/openapi.yaml
+++ b/openapi/openapi.yaml
@@ -4,7 +4,7 @@ info:
   title: Grid API
   description: >
     API for managing global payments on the open Money Grid. Built by Lightspark. See the full documentation at https://docs.lightspark.com/.
-  version: "2026-06-25"
+  version: "2026-06-29"
   contact:
     name: Lightspark Support
     email: support@lightspark.com