diff --git a/api-reference/fx-payment/reports/get-report.mdx b/api-reference/fx-payment/reports/get-report.mdx
new file mode 100644
index 0000000..e24faab
--- /dev/null
+++ b/api-reference/fx-payment/reports/get-report.mdx
@@ -0,0 +1,5 @@
+---
+title: "Get a report"
+description: "Aggregated view of operations over a time window, partitioned by asset."
+openapi: "apis/fx-payment/openapi.yml GET /api/reports"
+---
diff --git a/apis/fx-account/openapi.yml b/apis/fx-account/openapi.yml
index cf5a298..f4084bd 100644
--- a/apis/fx-account/openapi.yml
+++ b/apis/fx-account/openapi.yml
@@ -359,8 +359,18 @@ components:
           $ref: "#/components/schemas/RequirementsResponse"
         tags:
           type: array
+          description: >
+            System-managed labels attached to the account. Some tags
+            propagate to operations executed against this account.
           items:
             $ref: "#/components/schemas/TagResponse"
+          example:
+            - key: "psp"
+              value: "Amazon"
+            - key: null
+              value: "hidden"
+            - key: "compliance-tier"
+              value: "high"
         currentState:
           $ref: "#/components/schemas/AccountState"
         states:
@@ -1160,12 +1170,24 @@ components:
         - AX
     TagResponse:
       type: object
+      description: >
+        A label attached to a resource. Tags are system-managed — Trace
+        assigns them based on routing, compliance, and operational criteria.
+        Clients cannot create, modify, or remove tags via the API.
       properties:
         key:
           type: string
           nullable: true
+          description: >
+            Category for keyed tags (e.g., `psp`, `compliance-tier`).
+            `null` for single-value labels.
+          example: "psp"
         value:
           type: string
+          description: >
+            For keyed tags, the right-hand side of the label. For
+            single-value labels, the entire tag.
+          example: "Amazon"
       required:
         - value
     UBOResponse:
diff --git a/apis/fx-payment/openapi.yml b/apis/fx-payment/openapi.yml
index 7da51e2..683da86 100644
--- a/apis/fx-payment/openapi.yml
+++ b/apis/fx-payment/openapi.yml
@@ -15,6 +15,8 @@ security:
 tags:
   - name: Operations
     description: Create deposits, withdrawals, and swaps. Query operation status and history.
+  - name: Reports
+    description: Generate aggregated views of operations across a time window.
   - name: Beneficiaries
     description: Manage external beneficiaries and their payment instructions for withdrawals.
   - name: Payment instructions
@@ -118,10 +120,35 @@ components:
       description: >
         Filter expression using LHS Brackets syntax (`field[operator]=value`).
         Combine multiple conditions with `and(...)`, `or(...)`, or `;` (implicit AND).
-        See the [Filtering](/guides/principles/filtering) guide for the full operator catalog and examples.
+        See the [Filtering](/guides/principles/filtering) guide for the full operator catalog.
       schema:
         type: string
       example: "intent.type[eq]=WITHDRAWAL;currentState.status[eq]=COMPLETED"
+    PeriodStart:
+      name: periodStart
+      in: query
+      required: true
+      description: >
+        Inclusive start of the reporting window. UTC timestamp in ISO 8601 format —
+        the `Z` suffix is the timezone marker and is required (e.g., `2026-04-01T00:00:00Z`).
+        See the [Date and time](/guides/principles/datetime) guide for the full format.
+      schema:
+        type: string
+        format: date-time
+      example: "2026-04-01T00:00:00Z"
+    PeriodEnd:
+      name: periodEnd
+      in: query
+      required: true
+      description: >
+        Exclusive end of the reporting window. UTC timestamp in ISO 8601 format —
+        the `Z` suffix is the timezone marker and is required (e.g., `2026-05-01T00:00:00Z`).
+        Must be strictly greater than `periodStart`.
+        See the [Date and time](/guides/principles/datetime) guide for the full format.
+      schema:
+        type: string
+        format: date-time
+      example: "2026-05-01T00:00:00Z"
   schemas:
     # ── Shared value objects ──────────────────────────────────────────
     Asset:
@@ -229,6 +256,28 @@ components:
       required:
         - id
         - owner
+    TagResponse:
+      type: object
+      description: >
+        A label attached to a resource. Tags are system-managed — Trace
+        assigns them based on routing, compliance, and operational criteria.
+        Clients cannot create, modify, or remove tags via the API.
+      properties:
+        key:
+          type: string
+          nullable: true
+          description: >
+            Category for keyed tags (e.g., `psp`, `compliance-tier`).
+            `null` for single-value labels.
+          example: "psp"
+        value:
+          type: string
+          description: >
+            For keyed tags, the right-hand side of the label. For
+            single-value labels, the entire tag.
+          example: "Amazon"
+      required:
+        - value
     Reason:
       type: object
       description: Machine- and human-readable explanation. Returned inside an `OperationState` entry when a status transition requires justification (e.g., `FAILED`, `ON_HOLD`).
@@ -704,6 +753,66 @@ components:
         - code
         - message
 
+    # ── Report schemas ────────────────────────────────────────────────
+    # Documented here ahead of the Report domain model and controller.
+    ReportPeriod:
+      type: object
+      description: The reporting window. Boundary semantics are half-open — `start` inclusive, `end` exclusive.
+      properties:
+        start:
+          type: string
+          format: date-time
+          description: Inclusive start of the reporting window.
+          example: "2026-04-01T00:00:00Z"
+        end:
+          type: string
+          format: date-time
+          description: Exclusive end of the reporting window.
+          example: "2026-05-01T00:00:00Z"
+      required:
+        - start
+        - end
+    ReportAggregate:
+      type: object
+      description: Sum and count of monetary movements on a single side of the ledger within an asset partition.
+      properties:
+        sum:
+          $ref: "#/components/schemas/AmountResponse"
+        count:
+          type: integer
+          minimum: 0
+          description: Number of contributing transactions.
+          example: 3
+      required:
+        - sum
+        - count
+    ReportTotal:
+      type: object
+      description: Inflows and outflows for one asset over the reporting window. A row is present only when at least one settled transaction in that asset matched the filter.
+      properties:
+        asset:
+          $ref: "#/components/schemas/Asset"
+        inflows:
+          $ref: "#/components/schemas/ReportAggregate"
+        outflows:
+          $ref: "#/components/schemas/ReportAggregate"
+      required:
+        - asset
+    ReportResponse:
+      type: object
+      description: Aggregated view of operations over a time window. Generated on each request — not persisted.
+      properties:
+        period:
+          $ref: "#/components/schemas/ReportPeriod"
+        totals:
+          type: array
+          description: One entry per asset that had at least one settled transaction matching the filter in the period. Empty when nothing matched.
+          items:
+            $ref: "#/components/schemas/ReportTotal"
+      required:
+        - period
+        - totals
+
     # ── Quote schemas ─────────────────────────────────────────────────
     CreateQuoteRequest:
       type: object
@@ -1009,6 +1118,18 @@ components:
           type: array
           items:
             $ref: "#/components/schemas/OperationTransaction"
+        tags:
+          type: array
+          description: >
+            System-managed labels stamped onto the operation when it is
+            created. Inherited from the account's propagating tags.
+          items:
+            $ref: "#/components/schemas/TagResponse"
+          example:
+            - key: "psp"
+              value: "Amazon"
+            - key: "compliance-tier"
+              value: "high"
         currentState:
           $ref: "#/components/schemas/OperationState"
         states:
@@ -2164,6 +2285,85 @@ components:
               message: "Parameter 'body:accountId' not found in request"
               field: "body:accountId"
               params: {}
+    ReportMultiAssetActivity:
+      summary: Mixed deposits and withdrawals across BRL and USDT
+      value:
+        period:
+          start: "2026-04-01T00:00:00Z"
+          end: "2026-05-01T00:00:00Z"
+        totals:
+          - asset: "BRL"
+            inflows:
+              sum:
+                value: "5000.00"
+                asset: "BRL"
+                decimals: 2
+              count: 2
+            outflows:
+              sum:
+                value: "10000.00"
+                asset: "BRL"
+                decimals: 2
+              count: 2
+          - asset: "USDT"
+            outflows:
+              sum:
+                value: "2000.000000"
+                asset: "USDT"
+                decimals: 6
+              count: 2
+    ReportWithdrawalsOnly:
+      summary: Filtered to withdrawals only — no inflows
+      value:
+        period:
+          start: "2026-04-01T00:00:00Z"
+          end: "2026-05-01T00:00:00Z"
+        totals:
+          - asset: "BRL"
+            outflows:
+              sum:
+                value: "10000.00"
+                asset: "BRL"
+                decimals: 2
+              count: 2
+          - asset: "USDT"
+            outflows:
+              sum:
+                value: "2000.000000"
+                asset: "USDT"
+                decimals: 6
+              count: 2
+    ReportEmptyPeriod:
+      summary: No settled transactions matched the filter in the period
+      value:
+        period:
+          start: "2026-04-01T00:00:00Z"
+          end: "2026-05-01T00:00:00Z"
+        totals: []
+    ReportMissingPeriodStart:
+      summary: periodStart is missing from the query string
+      value:
+        code: "INVALID_DATA"
+        message: "Object contains invalid data"
+        details:
+          errors:
+            - code: "REQUIRED"
+              message: "Parameter 'query:periodStart' not found in request"
+              field: "query:periodStart"
+              params: {}
+    ReportPeriodEndNotAfterStart:
+      summary: periodEnd must be strictly greater than periodStart
+      value:
+        code: "INVALID_DATA"
+        message: "Object contains invalid data"
+        details:
+          errors:
+            - code: "INVALID_RANGE"
+              message: "'periodEnd' must be greater than 'periodStart'"
+              field: "query:periodEnd"
+              params:
+                periodStart: "2026-05-01T00:00:00Z"
+                periodEnd: "2026-04-01T00:00:00Z"
 
 paths:
   # ── Operations: Withdrawals ───────────────────────────────────────
@@ -2231,6 +2431,11 @@ paths:
                       decimals: 2
                     fees: []
                     transactions: []
+                    tags:
+                      - key: "psp"
+                        value: "Amazon"
+                      - key: "compliance-tier"
+                        value: "high"
                     currentState:
                       status: "REQUESTED"
                       createdAt: "2026-04-25T02:39:17Z"
@@ -2455,6 +2660,11 @@ paths:
                       decimals: 2
                     fees: []
                     transactions: []
+                    tags:
+                      - key: "psp"
+                        value: "Amazon"
+                      - key: "compliance-tier"
+                        value: "high"
                     currentState:
                       status: "REQUESTED"
                       createdAt: "2026-04-27T14:12:33Z"
@@ -2617,6 +2827,11 @@ paths:
                       decimals: 2
                     fees: []
                     transactions: []
+                    tags:
+                      - key: "psp"
+                        value: "Amazon"
+                      - key: "compliance-tier"
+                        value: "high"
                     currentState:
                       status: "REQUESTED"
                       createdAt: "2026-04-27T15:08:21Z"
@@ -3014,6 +3229,63 @@ paths:
                           field: "query:status"
                           params: {}
 
+  # ── Reports ───────────────────────────────────────────────────────
+  /api/reports:
+    get:
+      operationId: getReport
+      tags:
+        - Reports
+      summary: Get a report
+      description: |
+        Generates an aggregated view of operations over a time window. Activity is partitioned by `asset` because amounts in different currencies cannot be summed. Only settled transactions (`CONFIRMED` status) on operations matching `filters` contribute — pending and failed are excluded. The report is regenerated on each request and is not persisted.
+      parameters:
+        - $ref: "#/components/parameters/TraceVersion"
+        - $ref: "#/components/parameters/PeriodStart"
+        - $ref: "#/components/parameters/PeriodEnd"
+        - $ref: "#/components/parameters/Filters"
+          description: |
+            Common filters for reports:
+
+            - `account.id[eq]=a1b2c3d4-5e6f-7890-abcd-ef1234567890` — single account
+            - `asset[eq]=USD` — specific currency
+            - `tags.key[eq]=psp` — operations carrying a tag with this key
+            - `tags.value[eq]=Amazon` — operations carrying a tag with this value
+
+            See the [Filtering](/guides/principles/filtering) guide for the LHS Brackets syntax and the full operator catalog.
+      responses:
+        "200":
+          description: Aggregated report for the requested window.
+          headers:
+            X-Request-Id:
+              $ref: "#/components/headers/RequestId"
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/ReportResponse"
+              examples:
+                multiAssetActivity:
+                  $ref: "#/components/examples/ReportMultiAssetActivity"
+                withdrawalsOnly:
+                  $ref: "#/components/examples/ReportWithdrawalsOnly"
+                emptyPeriod:
+                  $ref: "#/components/examples/ReportEmptyPeriod"
+        "401":
+          $ref: "#/components/responses/UnauthorizedError"
+        "422":
+          description: Invalid query parameter or filter expression.
+          headers:
+            X-Request-Id:
+              $ref: "#/components/headers/RequestId"
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/ErrorResponse"
+              examples:
+                missingPeriodStart:
+                  $ref: "#/components/examples/ReportMissingPeriodStart"
+                periodEndNotAfterStart:
+                  $ref: "#/components/examples/ReportPeriodEndNotAfterStart"
+
   # ── Beneficiaries ─────────────────────────────────────────────────
   /api/beneficiaries:
     post:
diff --git a/apis/fx-webhook/openapi.yml b/apis/fx-webhook/openapi.yml
index b1fe065..9c8e134 100644
--- a/apis/fx-webhook/openapi.yml
+++ b/apis/fx-webhook/openapi.yml
@@ -1057,6 +1057,27 @@ components:
         - relationshipType
         - instruction
         - atTime
+    TagEvent:
+      type: object
+      description: >
+        A label attached to a resource. Tags are system-managed — Trace
+        assigns them based on routing, compliance, and operational criteria.
+      properties:
+        key:
+          type: string
+          nullable: true
+          description: >
+            Category for keyed tags (e.g., `psp`, `compliance-tier`).
+            `null` for single-value labels.
+          example: "psp"
+        value:
+          type: string
+          description: >
+            For keyed tags, the right-hand side of the label. For
+            single-value labels, the entire tag.
+          example: "Amazon"
+      required:
+        - value
     OperationEvent:
       type: object
       description: >
@@ -1094,6 +1115,16 @@ components:
           description: Underlying rail transactions executed for this operation.
           items:
             $ref: "#/components/schemas/TransactionEvent"
+        tags:
+          type: array
+          description: System-managed labels stamped onto the operation when it is created. Inherited from the account's propagating tags.
+          items:
+            $ref: "#/components/schemas/TagEvent"
+          example:
+            - key: "psp"
+              value: "Amazon"
+            - key: "compliance-tier"
+              value: "high"
         atTime:
           type: string
           format: date-time
diff --git a/docs.json b/docs.json
index 83c18d4..0545612 100644
--- a/docs.json
+++ b/docs.json
@@ -139,6 +139,13 @@
               "api-reference/fx-payment/operations/list-operations"
             ]
           },
+          {
+            "group": "Reports",
+            "icon": "chart-line",
+            "pages": [
+              "api-reference/fx-payment/reports/get-report"
+            ]
+          },
           {
             "group": "Quotes",
             "icon": "scale-balanced",