diff --git a/README.md b/README.md
index 3963232..91da516 100644
--- a/README.md
+++ b/README.md
@@ -18,13 +18,7 @@ cd op-blocknote-hocuspocus
 npm install
 
 # Start the server with the appropriate environment variables setup
-ALLOWED_DOMAINS=your-openproject-domain.com SECRET=secret12345 npm run start
-```
-
-For the server to be able to reach to an OpenProject instance, it is necessary to set the environment variable `ALLOWED_DOMAINS`. It is a comma-separated list of domains (and it allows subdomain matching).
-
-```
-ALLOWED_DOMAINS=subdomain-openproject.example.com,top-level-openproject.com`
+SECRET=secret12345 npm run start
 ```
 
 The `SECRET` environment variable is a shared value between this application and OpenProject. Make sure to configure the same value in OpenProject - Settings Hocuspocus secret and in the `SECRET` environment variable of this project.
@@ -36,7 +30,6 @@ docker pull openproject/hocuspocus:latest
 
 docker run -d \
   -p 1234:1234 \
-  -e ALLOWED_DOMAINS=your-openproject-domain.com \
   -e SECRET=secret12345 \
   openproject/hocuspocus:latest
 ```
diff --git a/src/extensions/openProjectApi.ts b/src/extensions/openProjectApi.ts
index 96ec378..5b6ee70 100644
--- a/src/extensions/openProjectApi.ts
+++ b/src/extensions/openProjectApi.ts
@@ -30,27 +30,6 @@ export class OpenProjectApi implements Extension {
     }
     const decryptedToken = decryptToken(token);
 
-    const allowedDomains = process.env.ALLOWED_DOMAINS?.split(',') || [];
-    if (allowedDomains.length <= 0) {
-      throw new Error('Unauthorized: No allowed domains configured.');
-    }
-
-    try {
-      const url = new URL(resourceUrl);
-      const isAllowed = allowedDomains.some(domain =>
-        url.hostname === domain.trim() || url.hostname.endsWith('.' + domain.trim())
-      );
-
-      if (!isAllowed) {
-        throw new Error('Unauthorized: Invalid base URL domain.');
-      }
-    } catch (error) {
-      if (error instanceof TypeError) {
-        throw new Error('Unauthorized: Invalid base URL format.');
-      }
-      throw error;
-    }
-
     const response = await fetch(resourceUrl, {
       method: "GET",
       headers: {
@@ -64,7 +43,6 @@ export class OpenProjectApi implements Extension {
     }
     const jsonData = await response.json() as ApiResponseDocument;
 
-    // data.documentName = resourceUrl;
     data.context.resourceUrl = resourceUrl;
     data.context.token = decryptedToken;
     if (!jsonData._links?.update) {
diff --git a/test/extensions/openProjectApi.test.ts b/test/extensions/openProjectApi.test.ts
index 77960af..cff3aab 100644
--- a/test/extensions/openProjectApi.test.ts
+++ b/test/extensions/openProjectApi.test.ts
@@ -5,18 +5,14 @@ import { OpenProjectApi, createEditor } from "../../src/extensions/openProjectAp
 
 describe("OpenProjectApi", () => {
   let fetchMock: any;
-  let originalAllowedDomains: string | undefined;
 
   beforeEach(() => {
     fetchMock = vi.fn();
     vi.stubGlobal('fetch', fetchMock);
-    originalAllowedDomains = process.env.ALLOWED_DOMAINS;
-    process.env.ALLOWED_DOMAINS = 'test.api,example.com';
   });
 
   afterEach(() => {
     vi.unstubAllGlobals();
-    process.env.ALLOWED_DOMAINS = originalAllowedDomains;
   });
 
   describe("onAuthenticate", () => {
@@ -28,7 +24,7 @@ describe("OpenProjectApi", () => {
       ).rejects.toThrowError("Unauthorized: Token missing.");
     });
 
-    test("when the token is invalid", async () => {
+    test("when the token is invalid throw an error", async () => {
       await expect(() =>
         new OpenProjectApi().onAuthenticate({
           // Invalid token, generated with a different secret
@@ -37,51 +33,15 @@ describe("OpenProjectApi", () => {
       ).rejects.toThrowError("Unsupported state or unable to authenticate data");
     });
 
-    test("when ALLOWED_DOMAINS is not configured throw an error", async () => {
-      delete process.env.ALLOWED_DOMAINS;
-
-      await expect(() =>
-        new OpenProjectApi().onAuthenticate({
-          token: "7u+b+QRJN7qANls=--URNw83hIWBq3MMIA--jtl+UPdtbniQVFNOs2EcAw==",
-        } as unknown as onAuthenticatePayload)
-      ).rejects.toThrowError("Unauthorized: No allowed domains configured.");
-    });
-
     test("when the resourceUrl has invalid format throw an error", async () => {
-      await expect(() =>
-        new OpenProjectApi().onAuthenticate({
-          token: "7u+b+QRJN7qANls=--URNw83hIWBq3MMIA--jtl+UPdtbniQVFNOs2EcAw==",
-          documentName: "not a valid url",
-        } as unknown as onAuthenticatePayload)
-      ).rejects.toThrowError("Unauthorized: Invalid base URL format.");
-    });
+      fetchMock.mockResolvedValueOnce({ throws: new TypeError("is not a valid URL") });
 
-    test("when the resourceUrl domain is not in ALLOWED_DOMAINS throw an error", async () => {
       await expect(() =>
         new OpenProjectApi().onAuthenticate({
           token: "7u+b+QRJN7qANls=--URNw83hIWBq3MMIA--jtl+UPdtbniQVFNOs2EcAw==",
-          documentName: "https://malicious.com/something/1",
+          documentName: "not a valid url",
         } as unknown as onAuthenticatePayload)
-      ).rejects.toThrowError("Unauthorized: Invalid base URL domain.");
-    });
-
-    test("when the resourceUrl subdomain matches ALLOWED_DOMAINS it should be accepted", async () => {
-      fetchMock.mockResolvedValueOnce({
-        ok: true,
-        status: 200,
-        json: () => Promise.resolve({}),
-      });
-
-      const data = {
-        context: {},
-        connectionConfig: {},
-        token: "7u+b+QRJN7qANls=--URNw83hIWBq3MMIA--jtl+UPdtbniQVFNOs2EcAw==",
-        documentName: "https://subdomain.test.api/api/v3/documents/1",
-      } as unknown as onAuthenticatePayload;
-
-      await new OpenProjectApi().onAuthenticate(data);
-
-      expect(data.context.resourceUrl).toEqual("https://subdomain.test.api/api/v3/documents/1");
+      ).rejects.toThrowError("Unauthorized: Invalid token or document access denied.");
     });
 
     test("when the server does not authorize the request throw an error", async () => {