diff --git a/packages/core/src/api/api/resources/observationsV2/client/Client.ts b/packages/core/src/api/api/resources/observationsV2/client/Client.ts
index 565754b1..f63f04f1 100644
--- a/packages/core/src/api/api/resources/observationsV2/client/Client.ts
+++ b/packages/core/src/api/api/resources/observationsV2/client/Client.ts
@@ -74,7 +74,7 @@ export class ObservationsV2 {
    * - `basic` - name, level, statusMessage, version, environment, bookmarked, public, userId, sessionId
    * - `time` - completionStartTime, createdAt, updatedAt
    * - `io` - input, output
-   * - `metadata` - metadata
+   * - `metadata` - metadata (truncated to 200 chars by default, use `expandMetadata` to get full values)
    * - `model` - providedModelName, internalModelId, modelParameters
    * - `usage` - usageDetails, costDetails, totalCost
    * - `prompt` - promptId, promptName, promptVersion
@@ -113,6 +113,7 @@ export class ObservationsV2 {
   ): Promise<core.WithRawResponse<LangfuseAPI.ObservationsV2Response>> {
     const {
       fields,
+      expandMetadata,
       limit,
       cursor,
       parseIoAsJson,
@@ -136,6 +137,10 @@ export class ObservationsV2 {
       _queryParams["fields"] = fields;
     }
 
+    if (expandMetadata != null) {
+      _queryParams["expandMetadata"] = expandMetadata;
+    }
+
     if (limit != null) {
       _queryParams["limit"] = limit.toString();
     }
diff --git a/packages/core/src/api/api/resources/observationsV2/client/requests/GetObservationsV2Request.ts b/packages/core/src/api/api/resources/observationsV2/client/requests/GetObservationsV2Request.ts
index b5299530..3c938642 100644
--- a/packages/core/src/api/api/resources/observationsV2/client/requests/GetObservationsV2Request.ts
+++ b/packages/core/src/api/api/resources/observationsV2/client/requests/GetObservationsV2Request.ts
@@ -16,6 +16,13 @@ export interface GetObservationsV2Request {
    * Example: "basic,usage,model"
    */
   fields?: string;
+  /**
+   * Comma-separated list of metadata keys to return non-truncated.
+   * By default, metadata values over 200 characters are truncated.
+   * Use this parameter to retrieve full values for specific keys.
+   * Example: "key1,key2"
+   */
+  expandMetadata?: string;
   /** Number of items to return per page. Maximum 1000, default 50. */
   limit?: number;
   /** Base64-encoded cursor for pagination. Use the cursor from the previous response to get the next page. */