diff --git a/fern/apis/fdr/definition/api/v1/read/__package__.yml b/fern/apis/fdr/definition/api/v1/read/__package__.yml
index 3bb0c6c2be..8552c37049 100644
--- a/fern/apis/fdr/definition/api/v1/read/__package__.yml
+++ b/fern/apis/fdr/definition/api/v1/read/__package__.yml
@@ -101,6 +101,9 @@ types:
     properties:
       nameOverride: optional<string>
       headerWireValue: string
+      prefix: 
+        type: optional<string>
+        docs: The prefix that comes before the header
 
 errors:
   ApiDoesNotExistError:
diff --git a/fern/apis/fdr/definition/api/v1/register/__package__.yml b/fern/apis/fdr/definition/api/v1/register/__package__.yml
index 06631d7a20..07bd2b296f 100644
--- a/fern/apis/fdr/definition/api/v1/register/__package__.yml
+++ b/fern/apis/fdr/definition/api/v1/register/__package__.yml
@@ -126,6 +126,9 @@ types:
     properties:
       nameOverride: optional<string>
       headerWireValue: string
+      prefix: 
+        type: optional<string>
+        docs: The prefix that comes before the header
 
   EndpointExampleGenerationErrorBody:
     properties:
diff --git a/packages/ui/app/src/api-playground/utils.ts b/packages/ui/app/src/api-playground/utils.ts
index fc0fd0ef63..1474393058 100644
--- a/packages/ui/app/src/api-playground/utils.ts
+++ b/packages/ui/app/src/api-playground/utils.ts
@@ -311,7 +311,9 @@ function buildRedactedHeaders(
                 if (auth.type === "header") {
                     const value = header.headers[auth.headerWireValue];
                     if (value != null) {
-                        headers[auth.headerWireValue] = obfuscateSecret(value);
+                        headers[auth.headerWireValue] = obfuscateSecret(
+                            auth.prefix != null ? `${auth.prefix} ${value}` : value,
+                        );
                     }
                 }
             },
@@ -387,7 +389,7 @@ export function buildUnredactedHeaders(
                 if (auth.type === "header") {
                     const value = header.headers[auth.headerWireValue];
                     if (value != null) {
-                        headers[auth.headerWireValue] = value;
+                        headers[auth.headerWireValue] = auth.prefix != null ? `${auth.prefix} ${value}` : value;
                     }
                 }
             },