diff --git a/.changeset/five-worlds-kneel.md b/.changeset/five-worlds-kneel.md
new file mode 100644
index 0000000000..049f641e64
--- /dev/null
+++ b/.changeset/five-worlds-kneel.md
@@ -0,0 +1,6 @@
+---
+'@gitbook/openapi-parser': patch
+'@gitbook/react-openapi': patch
+---
+
+Add x-gitbook-prefix and x-gitbook-token-placeholder for OpenAPI security scheme
diff --git a/packages/openapi-parser/src/types.ts b/packages/openapi-parser/src/types.ts
index a1af691ec3..1e6d42aa98 100644
--- a/packages/openapi-parser/src/types.ts
+++ b/packages/openapi-parser/src/types.ts
@@ -75,6 +75,14 @@ export interface OpenAPICustomOperationProperties {
  */
 export interface OpenAPICustomPrefillProperties {
     'x-gitbook-prefill'?: string;
+    /**
+     * Token placeholder used inside sample credentials (e.g., "Bearer ${token}").
+     */
+    'x-gitbook-token-placeholder'?: string;
+    /**
+     * Prefix to override the default one for the security scheme (e.g., "Bearer", "Basic", "Token").
+     */
+    'x-gitbook-prefix'?: string;
 }
 
 export type OpenAPIStability = 'experimental' | 'alpha' | 'beta';
diff --git a/packages/react-openapi/src/OpenAPICodeSample.test.ts b/packages/react-openapi/src/OpenAPICodeSample.test.ts
new file mode 100644
index 0000000000..dbae8e87cf
--- /dev/null
+++ b/packages/react-openapi/src/OpenAPICodeSample.test.ts
@@ -0,0 +1,76 @@
+import { describe, expect, it } from 'bun:test';
+import { getSecurityHeaders } from './OpenAPICodeSample';
+import type { OpenAPIOperationData } from './types';
+
+describe('getSecurityHeaders', () => {
+    it('should handle custom HTTP scheme with x-gitbook-prefix', () => {
+        const securities: OpenAPIOperationData['securities'] = [
+            [
+                'customScheme',
+                {
+                    type: 'apiKey',
+                    in: 'header',
+                    name: 'Authorization',
+                    'x-gitbook-prefix': 'CustomScheme',
+                },
+            ],
+        ];
+
+        const result = getSecurityHeaders({
+            securityRequirement: [{ customScheme: [] }],
+            securities,
+        });
+
+        expect(result).toEqual({
+            Authorization: 'CustomScheme YOUR_API_KEY',
+        });
+    });
+
+    it('should use x-gitbook-prefix with x-gitbook-token-placeholder together', () => {
+        const securities: OpenAPIOperationData['securities'] = [
+            [
+                'customAuth',
+                {
+                    type: 'apiKey',
+                    in: 'header',
+                    name: 'Authorization',
+                    'x-gitbook-prefix': 'Token',
+                    'x-gitbook-token-placeholder': 'MY_CUSTOM_TOKEN',
+                },
+            ],
+        ];
+
+        const result = getSecurityHeaders({
+            securityRequirement: [{ customAuth: [] }],
+            securities,
+        });
+
+        expect(result).toEqual({
+            Authorization: 'Token MY_CUSTOM_TOKEN',
+        });
+    });
+
+    it('should not use x-gitbook-prefix for http scheme', () => {
+        const securities: OpenAPIOperationData['securities'] = [
+            [
+                'customAuth',
+                {
+                    type: 'http',
+                    in: 'header',
+                    name: 'Authorization',
+                    scheme: 'bearer',
+                    'x-gitbook-prefix': 'Token',
+                },
+            ],
+        ];
+
+        const result = getSecurityHeaders({
+            securityRequirement: [{ customAuth: [] }],
+            securities,
+        });
+
+        expect(result).toEqual({
+            Authorization: 'Bearer YOUR_SECRET_TOKEN',
+        });
+    });
+});
diff --git a/packages/react-openapi/src/OpenAPICodeSample.tsx b/packages/react-openapi/src/OpenAPICodeSample.tsx
index 5287d4fe84..8805b6fbbf 100644
--- a/packages/react-openapi/src/OpenAPICodeSample.tsx
+++ b/packages/react-openapi/src/OpenAPICodeSample.tsx
@@ -290,7 +290,7 @@ function getCustomCodeSamples(props: {
     return customCodeSamples;
 }
 
-function getSecurityHeaders(args: {
+export function getSecurityHeaders(args: {
     securityRequirement: OpenAPIV3.OperationObject['security'];
     securities: OpenAPIOperationData['securities'];
 }): {
@@ -314,6 +314,7 @@ function getSecurityHeaders(args: {
     for (const security of selectedSecurity.schemes) {
         switch (security.type) {
             case 'http': {
+                // We do not use x-gitbook-prefix for http schemes to avoid confusion with the standard.
                 let scheme = security.scheme;
                 const defaultPlaceholderValue = scheme?.toLowerCase()?.includes('basic')
                     ? 'username:password'
@@ -329,6 +330,8 @@ function getSecurityHeaders(args: {
                     scheme = 'Basic';
                 } else if (scheme?.includes('token')) {
                     scheme = 'Token';
+                } else {
+                    scheme = scheme ?? '';
                 }
 
                 headers.Authorization = `${scheme} ${format}`;
@@ -339,17 +342,23 @@ function getSecurityHeaders(args: {
                     break;
                 }
                 const name = security.name ?? 'Authorization';
-                headers[name] = resolvePrefillCodePlaceholderFromSecurityScheme({
+                const placeholder = resolvePrefillCodePlaceholderFromSecurityScheme({
                     security: security,
                     defaultPlaceholderValue: 'YOUR_API_KEY',
                 });
+                // Use x-gitbook-prefix if provided for apiKey schemes
+                const prefix = security['x-gitbook-prefix'];
+                headers[name] = prefix ? `${prefix} ${placeholder}` : placeholder;
                 break;
             }
             case 'oauth2': {
-                headers.Authorization = `Bearer ${resolvePrefillCodePlaceholderFromSecurityScheme({
-                    security: security,
-                    defaultPlaceholderValue: 'YOUR_OAUTH2_TOKEN',
-                })}`;
+                const prefix = security['x-gitbook-prefix'] ?? 'Bearer';
+                headers.Authorization = `${prefix} ${resolvePrefillCodePlaceholderFromSecurityScheme(
+                    {
+                        security: security,
+                        defaultPlaceholderValue: 'YOUR_OAUTH2_TOKEN',
+                    }
+                )}`;
                 break;
             }
             default: {
diff --git a/packages/react-openapi/src/util/tryit-prefill.test.ts b/packages/react-openapi/src/util/tryit-prefill.test.ts
index 0341269eac..43983f5858 100644
--- a/packages/react-openapi/src/util/tryit-prefill.test.ts
+++ b/packages/react-openapi/src/util/tryit-prefill.test.ts
@@ -415,6 +415,32 @@ describe('resolvePrefillCodePlaceholderFromSecurityScheme (integration style)',
 
         expect(result).toBe('');
     });
+
+    it('should prioritize x-gitbook-prefill over x-gitbook-token-placeholder when both are present', () => {
+        const result = resolvePrefillCodePlaceholderFromSecurityScheme({
+            security: {
+                type: 'apiKey',
+                in: 'header',
+                'x-gitbook-prefill': '{{ visitor.claims.apiToken }}',
+                'x-gitbook-token-placeholder': 'API_TOKEN_KEY',
+            },
+        });
+
+        expect(result).toBe('$$__X-GITBOOK-PREFILL[(visitor.claims.apiToken)]__$$');
+    });
+
+    it('should return x-gitbook-token-placeholder for apiKey scheme', () => {
+        const result = resolvePrefillCodePlaceholderFromSecurityScheme({
+            security: {
+                type: 'apiKey',
+                in: 'header',
+                name: 'X-API-KEY',
+                'x-gitbook-token-placeholder': 'YOUR_API_KEY_HERE',
+            },
+        });
+
+        expect(result).toBe('YOUR_API_KEY_HERE');
+    });
 });
 
 describe('resolveURLWithPrefillCodePlaceholdersFromServer', () => {
diff --git a/packages/react-openapi/src/util/tryit-prefill.ts b/packages/react-openapi/src/util/tryit-prefill.ts
index b583b64ba4..99755ea9ba 100644
--- a/packages/react-openapi/src/util/tryit-prefill.ts
+++ b/packages/react-openapi/src/util/tryit-prefill.ts
@@ -177,6 +177,10 @@ export function resolvePrefillCodePlaceholderFromSecurityScheme(args: {
     const prefillExprParts = extractPrefillExpressionPartsFromSecurityScheme(security);
 
     if (prefillExprParts.length === 0) {
+        // If no x-gitbook-prefill, check for x-gitbook-token-placeholder
+        if (security['x-gitbook-token-placeholder']) {
+            return security['x-gitbook-token-placeholder'];
+        }
         return defaultPlaceholderValue ?? '';
     }
     const prefillExpr = templatePartsToExpression(prefillExprParts);