⚡ Add Free API support to DeepL Node (#1810)

packages/nodes-base/credentials/DeepLApi.credentials.ts

@@ -11,5 +11,21 @@ export class DeepLApi implements ICredentialType {
 			type: 'string' as NodePropertyTypes,
 			default: '',
 		},
+		{
+			displayName: 'API Plan',
+			name: 'apiPlan',
+			type: 'options' as NodePropertyTypes,
+			options: [
+				{
+					name: 'Pro Plan',
+					value: 'pro',
+				},
+				{
+					name: 'Free Plan',
+					value: 'free',
+				},
+			],
+			default: 'pro',
+		},
 	];
 }

packages/nodes-base/nodes/DeepL/GenericFunctions.ts

@@ -22,6 +22,15 @@ export async function deepLApiRequest(
 	headers: IDataObject = {},
 ) {
 
+	const proApiEndpoint = 'https://api.deepl.com/v2';
+	const freeApiEndpoint = 'https://api-free.deepl.com/v2';
+
+	const credentials = this.getCredentials('deepLApi');
+
+	if (credentials === undefined) {
+		throw new NodeOperationError(this.getNode(), 'No credentials got returned!');
+	}
+
 	const options: OptionsWithUri = {
 		headers: {
 			'Content-Type': 'application/json',
@@ -29,7 +38,7 @@ export async function deepLApiRequest(
 		method,
 		body,
 		qs,
-		uri: uri || `https://api.deepl.com/v2${resource}`,
+		uri: uri || `${credentials.apiPlan === 'pro' ? proApiEndpoint : freeApiEndpoint}${resource}`,
 		json: true,
 	};
 
@@ -42,12 +51,6 @@ export async function deepLApiRequest(
 			delete options.body;
 		}
 
-		const credentials = this.getCredentials('deepLApi');
-
-		if (credentials === undefined) {
-			throw new NodeOperationError(this.getNode(), 'No credentials got returned!');
-		}
-
 		options.qs.auth_key = credentials.apiKey;
 
 		return await this.helpers.request!(options);