diff --git a/.changeset/long-icons-share.md b/.changeset/long-icons-share.md
new file mode 100644
index 00000000000..24adca8d9ec
--- /dev/null
+++ b/.changeset/long-icons-share.md
@@ -0,0 +1,9 @@
+---
+'gatsby-plugin-clerk': major
+---
+
+Drop deprecations. Migration steps:
+- use `CLERK_SECRET_KEY` instead of `CLERK_API_KEY` env variable
+- use `secretKey` instead of `apiKey`
+- use `GATSBY_CLERK_PUBLISHABLE_KEY` instead of `GATSBY_CLERK_FRONTEND_API` env variable
+- use `publishableKey` instead of `frontendApi`
\ No newline at end of file
diff --git a/packages/gatsby-plugin-clerk/src/constants.ts b/packages/gatsby-plugin-clerk/src/constants.ts
index 4e8e2abf1f9..c736e8e0fcf 100644
--- a/packages/gatsby-plugin-clerk/src/constants.ts
+++ b/packages/gatsby-plugin-clerk/src/constants.ts
@@ -1,22 +1,6 @@
-import { deprecated } from '@clerk/shared/deprecated';
-
 export const API_URL = process.env.CLERK_API_URL || 'https://api.clerk.com';
 export const API_VERSION = process.env.CLERK_API_VERSION || 'v1';
-/**
- * @deprecated Use `CLERK_SECRET_KEY` instead.
- */
-export const API_KEY = process.env.CLERK_API_KEY || '';
-if (API_KEY) {
-  deprecated('CLERK_API_KEY', 'Use `CLERK_SECRET_KEY` environment variable instead.');
-}
 export const SECRET_KEY = process.env.CLERK_SECRET_KEY || '';
-/**
- * @deprecated Use `PUBLISHABLE_KEY` instead.
- */
-export const FRONTEND_API = process.env.GATSBY_CLERK_FRONTEND_API || '';
-if (FRONTEND_API) {
-  deprecated('FRONTEND_API', 'Use `PUBLISHABLE_KEY` environment variable instead.');
-}
 export const PUBLISHABLE_KEY = process.env.GATSBY_CLERK_PUBLISHABLE_KEY || '';
 
 export const CLERK_JS = process.env.GATSBY_CLERK_JS;
diff --git a/packages/gatsby-plugin-clerk/src/gatsby-browser.tsx b/packages/gatsby-plugin-clerk/src/gatsby-browser.tsx
index 470fd88d2ec..0e5cbdafdb6 100644
--- a/packages/gatsby-plugin-clerk/src/gatsby-browser.tsx
+++ b/packages/gatsby-plugin-clerk/src/gatsby-browser.tsx
@@ -1,8 +1,7 @@
-/* eslint-disable turbo/no-undeclared-env-vars */
 import type { GatsbyBrowser } from 'gatsby';
 import React from 'react';
 
-import { CLERK_JS, FRONTEND_API, PROXY_URL, PUBLISHABLE_KEY } from './constants';
+import { CLERK_JS, PROXY_URL, PUBLISHABLE_KEY } from './constants';
 import { ClerkProvider } from './GatsbyClerkProvider';
 
 export const wrapPageElement: GatsbyBrowser['wrapPageElement'] = ({ element, props }, pluginOptions) => {
@@ -13,9 +12,7 @@ export const wrapPageElement: GatsbyBrowser['wrapPageElement'] = ({ element, pro
   }
 
   return (
-    // @ts-expect-error
     <ClerkProvider
-      frontendApi={FRONTEND_API || ''}
       publishableKey={PUBLISHABLE_KEY || ''}
       clerkJSUrl={CLERK_JS}
       proxyUrl={PROXY_URL}
diff --git a/packages/gatsby-plugin-clerk/src/gatsby-ssr.tsx b/packages/gatsby-plugin-clerk/src/gatsby-ssr.tsx
index 8f55706b0b6..79f6f29b198 100644
--- a/packages/gatsby-plugin-clerk/src/gatsby-ssr.tsx
+++ b/packages/gatsby-plugin-clerk/src/gatsby-ssr.tsx
@@ -1,8 +1,7 @@
-/* eslint-disable turbo/no-undeclared-env-vars */
 import type { GatsbySSR } from 'gatsby';
 import React from 'react';
 
-import { CLERK_JS, FRONTEND_API, PROXY_URL, PUBLISHABLE_KEY } from './constants';
+import { CLERK_JS, PROXY_URL, PUBLISHABLE_KEY } from './constants';
 import { ClerkProvider } from './GatsbyClerkProvider';
 
 export const wrapPageElement: GatsbySSR['wrapPageElement'] = ({ element, props }, pluginOptions) => {
@@ -13,9 +12,7 @@ export const wrapPageElement: GatsbySSR['wrapPageElement'] = ({ element, props }
   }
 
   return (
-    // @ts-expect-error
     <ClerkProvider
-      frontendApi={FRONTEND_API}
       publishableKey={PUBLISHABLE_KEY}
       clerkJSUrl={CLERK_JS}
       proxyUrl={PROXY_URL}
diff --git a/packages/gatsby-plugin-clerk/src/ssr/authenticateRequest.ts b/packages/gatsby-plugin-clerk/src/ssr/authenticateRequest.ts
index dbc6ea783dc..16e2d71c668 100644
--- a/packages/gatsby-plugin-clerk/src/ssr/authenticateRequest.ts
+++ b/packages/gatsby-plugin-clerk/src/ssr/authenticateRequest.ts
@@ -1,15 +1,13 @@
 import type { GetServerDataProps } from 'gatsby';
 
-import { API_KEY, FRONTEND_API, PUBLISHABLE_KEY, SECRET_KEY } from '../constants';
+import { PUBLISHABLE_KEY, SECRET_KEY } from '../constants';
 import { clerkClient, constants, createIsomorphicRequest } from './clerkClient';
 import type { WithServerAuthOptions } from './types';
 
 export function authenticateRequest(context: GetServerDataProps, options: WithServerAuthOptions) {
   return clerkClient.authenticateRequest({
     ...options,
-    apiKey: API_KEY,
     secretKey: SECRET_KEY,
-    frontendApi: FRONTEND_API,
     publishableKey: PUBLISHABLE_KEY,
     request: createIsomorphicRequest((Request, Headers) => {
       const headers = new Headers(Object.fromEntries(context.headers) as Record<string, string>);
@@ -38,7 +36,7 @@ const returnReferrerAsXForwardedHostToFixLocalDevGatsbyProxy = (headers: Map<str
   const referrerUrl = new URL(headers.get(constants.Headers.Referrer) as string);
   const hostUrl = new URL('https://' + (headers.get(constants.Headers.Host) as string));
 
-  if (isDevelopmentOrStaging(SECRET_KEY || API_KEY || '') && hostUrl.hostname === referrerUrl.hostname) {
+  if (isDevelopmentOrStaging(SECRET_KEY || '') && hostUrl.hostname === referrerUrl.hostname) {
     return referrerUrl.host;
   }
 
diff --git a/packages/gatsby-plugin-clerk/src/ssr/clerkClient.ts b/packages/gatsby-plugin-clerk/src/ssr/clerkClient.ts
index a6ed05bc75b..b70a88df128 100644
--- a/packages/gatsby-plugin-clerk/src/ssr/clerkClient.ts
+++ b/packages/gatsby-plugin-clerk/src/ssr/clerkClient.ts
@@ -1,10 +1,8 @@
-/* eslint-disable turbo/no-undeclared-env-vars */
 import { Clerk } from '@clerk/backend';
 
-import { API_KEY, API_URL, API_VERSION, SECRET_KEY } from '../constants';
+import { API_URL, API_VERSION, SECRET_KEY } from '../constants';
 
 const clerkClient = Clerk({
-  apiKey: API_KEY,
   secretKey: SECRET_KEY,
   apiUrl: API_URL,
   apiVersion: API_VERSION,
@@ -14,6 +12,6 @@ const clerkClient = Clerk({
 
 const createClerkClient = Clerk;
 
-export { clerkClient, createClerkClient, Clerk };
+export { Clerk, clerkClient, createClerkClient };
 
 export * from '@clerk/backend';
diff --git a/packages/gatsby-plugin-clerk/src/ssr/withServerAuth.ts b/packages/gatsby-plugin-clerk/src/ssr/withServerAuth.ts
index 9e50ee83b0e..062ae24429f 100644
--- a/packages/gatsby-plugin-clerk/src/ssr/withServerAuth.ts
+++ b/packages/gatsby-plugin-clerk/src/ssr/withServerAuth.ts
@@ -1,6 +1,6 @@
 import type { GetServerDataProps, GetServerDataReturn } from 'gatsby';
 
-import { FRONTEND_API, PUBLISHABLE_KEY } from '../constants';
+import { PUBLISHABLE_KEY } from '../constants';
 import { authenticateRequest } from './authenticateRequest';
 import { clerkClient, constants } from './clerkClient';
 import type { WithServerAuthCallback, WithServerAuthOptions, WithServerAuthResult } from './types';
@@ -25,8 +25,9 @@ export const withServerAuth: WithServerAuth = (cbOrOptions: any, options?: any):
         [constants.Headers.AuthMessage]: requestState.message,
         [constants.Headers.AuthStatus]: requestState.status,
       };
+      // TODO(@dimkl): use empty string for frontendApi until type is fixed in @clerk/backend to drop it
       const interstitialHtml = clerkClient.localInterstitial({
-        frontendApi: FRONTEND_API,
+        frontendApi: '',
         publishableKey: PUBLISHABLE_KEY,
       });
       return injectSSRStateIntoProps({ headers }, { __clerk_ssr_interstitial_html: interstitialHtml });