diff --git a/packages/nodes-base/credentials/DiscourseApi.credentials.ts b/packages/nodes-base/credentials/DiscourseApi.credentials.ts
index 3abf156799239..d34da38ea8fc5 100644
--- a/packages/nodes-base/credentials/DiscourseApi.credentials.ts
+++ b/packages/nodes-base/credentials/DiscourseApi.credentials.ts
@@ -1,5 +1,8 @@
 import {
+	ICredentialDataDecryptedObject,
+	ICredentialTestRequest,
 	ICredentialType,
+	IHttpRequestOptions,
 	INodeProperties,
 } from 'n8n-workflow';
 
@@ -30,4 +33,25 @@ export class DiscourseApi implements ICredentialType {
 			default: '',
 		},
 	];
+
+	async authenticate(credentials: ICredentialDataDecryptedObject, requestOptions: IHttpRequestOptions): Promise<IHttpRequestOptions> {
+		requestOptions.headers = {
+			'Api-Key': credentials.apiKey,
+			'Api-Username': credentials.username,
+		};
+
+		if (requestOptions.method === 'GET') {
+			delete requestOptions.body;
+		}
+
+		return requestOptions;
+	}
+
+	test: ICredentialTestRequest = {
+		request: {
+			baseURL: '={{$credentials.url}}',
+			url: '/admin/groups.json',
+			method: 'GET',
+		},
+	};
 }
diff --git a/packages/nodes-base/credentials/ZendeskApi.credentials.ts b/packages/nodes-base/credentials/ZendeskApi.credentials.ts
index f4c2898669a6f..8a6e21e29b6a5 100644
--- a/packages/nodes-base/credentials/ZendeskApi.credentials.ts
+++ b/packages/nodes-base/credentials/ZendeskApi.credentials.ts
@@ -38,7 +38,7 @@ export class ZendeskApi implements ICredentialType {
 			password: credentials.apiToken as string,
 		};
 		return requestOptions;
- }
+	}
 	test: ICredentialTestRequest = {
 		request: {
 			baseURL: '=https://{{$credentials.subdomain}}.zendesk.com/api/v2',
diff --git a/packages/nodes-base/nodes/Discourse/Discourse.node.ts b/packages/nodes-base/nodes/Discourse/Discourse.node.ts
index 5bc4d350af635..38ff72cb89888 100644
--- a/packages/nodes-base/nodes/Discourse/Discourse.node.ts
+++ b/packages/nodes-base/nodes/Discourse/Discourse.node.ts
@@ -3,12 +3,16 @@ import {
 } from 'n8n-core';
 
 import {
+	ICredentialsDecrypted,
+	ICredentialTestFunctions,
 	IDataObject,
 	ILoadOptionsFunctions,
+	INodeCredentialTestResult,
 	INodeExecutionData,
 	INodePropertyOptions,
 	INodeType,
 	INodeTypeDescription,
+	JsonObject,
 } from 'n8n-workflow';
 
 import {
@@ -44,6 +48,7 @@ import {
 	userGroupFields,
 	userGroupOperations,
 } from './UserGroupDescription';
+import { OptionsWithUri } from 'request';
 
 //import moment from 'moment';
 
@@ -117,6 +122,7 @@ export class Discourse implements INodeType {
 	};
 
 	methods = {
+
 		loadOptions: {
 			// Get all the calendars to display them to user so that he can
 			// select them easily
@@ -321,6 +327,7 @@ export class Discourse implements INodeType {
 					//https://docs.discourse.org/#tag/Posts/paths/~1posts.json/get
 					if (operation === 'getAll') {
 						const returnAll = this.getNodeParameter('returnAll', i) as boolean;
+						const limit = this.getNodeParameter('limit', i, 0) as number;
 
 						responseData = await discourseApiRequest.call(
 							this,
@@ -329,11 +336,29 @@ export class Discourse implements INodeType {
 							{},
 							qs,
 						);
-
 						responseData = responseData.latest_posts;
 
+						//Getting all posts relying on https://github.com/discourse/discourse_api/blob/main/spec/discourse_api/api/posts_spec.rb
+						let lastPost = responseData.pop();
+						let previousLastPostID;
+						while (lastPost.id !== previousLastPostID) {
+							if (limit && responseData.length > limit) {
+								break;
+							}
+							const chunk = await discourseApiRequest.call(
+								this,
+								'GET',
+								`/posts.json?before=${lastPost.id}`,
+								{},
+								qs,
+							);
+							responseData = responseData.concat(chunk.latest_posts);
+							previousLastPostID = lastPost.id;
+							lastPost = responseData.pop();
+						}
+						responseData.push(lastPost);
+
 						if (returnAll === false) {
-							const limit = this.getNodeParameter('limit', i) as number;
 							responseData = responseData.splice(0, limit);
 						}
 					}
@@ -495,7 +520,7 @@ export class Discourse implements INodeType {
 				}
 			} catch (error) {
 				if (this.continueOnFail()) {
-					returnData.push({ error: error.message });
+					returnData.push({ error: (error as JsonObject).message });
 					continue;
 				}
 				throw error;
diff --git a/packages/nodes-base/nodes/Discourse/GenericFunctions.ts b/packages/nodes-base/nodes/Discourse/GenericFunctions.ts
index 81462dd288710..94152fef57815 100644
--- a/packages/nodes-base/nodes/Discourse/GenericFunctions.ts
+++ b/packages/nodes-base/nodes/Discourse/GenericFunctions.ts
@@ -9,18 +9,14 @@ import {
 } from 'n8n-core';
 
 import {
-	IDataObject, NodeApiError,
+	IDataObject, JsonObject, NodeApiError,
 } from 'n8n-workflow';
 
 export async function discourseApiRequest(this: IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions, method: string, path: string, body: any = {}, qs: IDataObject = {}, option = {}): Promise<any> { // tslint:disable-line:no-any
 
-	const credentials = await this.getCredentials('discourseApi');
+	const credentials = await this.getCredentials('discourseApi') as { url: string };
 
 	const options: OptionsWithUri = {
-		headers: {
-			'Api-Key': credentials.apiKey,
-			'Api-Username': credentials.username,
-		},
 		method,
 		body,
 		qs,
@@ -32,10 +28,9 @@ export async function discourseApiRequest(this: IExecuteFunctions | IExecuteSing
 		if (Object.keys(body).length === 0) {
 			delete options.body;
 		}
-		//@ts-ignore
-		return await this.helpers.request.call(this, options);
+		return await this.helpers.requestWithAuthentication.call(this, 'discourseApi', options);
 	} catch (error) {
-		throw new NodeApiError(this.getNode(), error);
+		throw new NodeApiError(this.getNode(), error as JsonObject);
 	}
 }
 
diff --git a/packages/nodes-base/nodes/Zendesk/Zendesk.node.ts b/packages/nodes-base/nodes/Zendesk/Zendesk.node.ts
index 8e8c3b7a88e5c..11bd7637f7351 100644
--- a/packages/nodes-base/nodes/Zendesk/Zendesk.node.ts
+++ b/packages/nodes-base/nodes/Zendesk/Zendesk.node.ts
@@ -1,17 +1,10 @@
-import {
-	OptionsWithUri,
-} from 'request';
-
 import {
 	IExecuteFunctions,
 } from 'n8n-core';
 
 import {
-	ICredentialsDecrypted,
-	ICredentialTestFunctions,
 	IDataObject,
 	ILoadOptionsFunctions,
-	INodeCredentialTestResult,
 	INodeExecutionData,
 	INodePropertyOptions,
 	INodeType,