feat: Add AI tool building capabilities (#7336)

Github issue / Community forum post (link here to close automatically):
https://community.n8n.io/t/langchain-memory-chat/23733

---------

Signed-off-by: Oleg Ivaniv <me@olegivaniv.com>
Co-authored-by: Oleg Ivaniv <me@olegivaniv.com>
Co-authored-by: Val <68596159+valya@users.noreply.github.com>
Co-authored-by: Alex Grozav <alex@grozav.com>
Co-authored-by: कारतोफ्फेलस्क्रिप्ट™ <aditya@netroy.in>
Co-authored-by: Deborah <deborah@starfallprojects.co.uk>
Co-authored-by: Jesper Bylund <mail@jesperbylund.com>
Co-authored-by: Jon <jonathan.bennetts@gmail.com>
Co-authored-by: Michael Kret <88898367+michael-radency@users.noreply.github.com>
Co-authored-by: Giulio Andreini <andreini@netseven.it>
Co-authored-by: Mason Geloso <Mason.geloso@gmail.com>
Co-authored-by: Mason Geloso <hone@Masons-Mac-mini.local>
Co-authored-by: Mutasem Aldmour <mutasem@n8n.io>

packages/@n8n/nodes-langchain/credentials/AnthropicApi.credentials.ts

@@ -0,0 +1,50 @@
+import type {
+	IAuthenticateGeneric,
+	ICredentialTestRequest,
+	ICredentialType,
+	INodeProperties,
+} from 'n8n-workflow';
+
+export class AnthropicApi implements ICredentialType {
+	name = 'anthropicApi';
+
+	displayName = 'Anthropic';
+
+	documentationUrl = 'anthropic';
+
+	properties: INodeProperties[] = [
+		{
+			displayName: 'API Key',
+			name: 'apiKey',
+			type: 'string',
+			typeOptions: { password: true },
+			required: true,
+			default: '',
+		},
+	];
+
+	authenticate: IAuthenticateGeneric = {
+		type: 'generic',
+		properties: {
+			headers: {
+				'x-api-key': '={{$credentials.apiKey}}',
+			},
+		},
+	};
+
+	test: ICredentialTestRequest = {
+		request: {
+			baseURL: 'https://api.anthropic.com',
+			url: '/v1/complete',
+			method: 'POST',
+			headers: {
+				'anthropic-version': '2023-06-01',
+			},
+			body: {
+				model: 'claude-2',
+				prompt: '\n\nHuman: Hello, world!\n\nAssistant:',
+				max_tokens_to_sample: 256,
+			},
+		},
+	};
+}

packages/@n8n/nodes-langchain/credentials/CohereApi.credentials.ts

@@ -0,0 +1,45 @@
+import type {
+	IAuthenticateGeneric,
+	ICredentialTestRequest,
+	ICredentialType,
+	INodeProperties,
+} from 'n8n-workflow';
+
+export class CohereApi implements ICredentialType {
+	name = 'cohereApi';
+
+	displayName = 'CohereApi';
+
+	documentationUrl = 'cohere';
+
+	properties: INodeProperties[] = [
+		{
+			displayName: 'API Key',
+			name: 'apiKey',
+			type: 'string',
+			typeOptions: { password: true },
+			required: true,
+			default: '',
+		},
+	];
+
+	authenticate: IAuthenticateGeneric = {
+		type: 'generic',
+		properties: {
+			headers: {
+				Authorization: '=Bearer {{$credentials.apiKey}}',
+			},
+		},
+	};
+
+	test: ICredentialTestRequest = {
+		request: {
+			baseURL: 'https://api.cohere.ai',
+			url: '/v1/detect-language',
+			method: 'POST',
+			body: {
+				texts: ['hello'],
+			},
+		},
+	};
+}

packages/@n8n/nodes-langchain/credentials/GooglePalmApi.credentials.ts

@@ -0,0 +1,47 @@
+import type {
+	IAuthenticateGeneric,
+	ICredentialTestRequest,
+	ICredentialType,
+	INodeProperties,
+} from 'n8n-workflow';
+
+export class GooglePalmApi implements ICredentialType {
+	name = 'googlePalmApi';
+
+	displayName = 'GooglePaLMApi';
+
+	documentationUrl = 'googlePalm';
+
+	properties: INodeProperties[] = [
+		{
+			displayName: 'Host',
+			name: 'host',
+			required: true,
+			type: 'string',
+			default: 'https://generativelanguage.googleapis.com',
+		},
+		{
+			displayName: 'API Key',
+			name: 'apiKey',
+			type: 'string',
+			typeOptions: { password: true },
+			required: true,
+			default: '',
+		},
+	];
+
+	authenticate: IAuthenticateGeneric = {
+		type: 'generic',
+		properties: {
+			qs: {
+				key: '={{$credentials.apiKey}}',
+			},
+		},
+	};
+
+	test: ICredentialTestRequest = {
+		request: {
+			baseURL: '={{$credentials.host}}/v1beta3/models',
+		},
+	};
+}

packages/@n8n/nodes-langchain/credentials/HuggingFaceApi.credentials.ts

@@ -0,0 +1,41 @@
+import type {
+	IAuthenticateGeneric,
+	ICredentialTestRequest,
+	ICredentialType,
+	INodeProperties,
+} from 'n8n-workflow';
+
+export class HuggingFaceApi implements ICredentialType {
+	name = 'huggingFaceApi';
+
+	displayName = 'HuggingFaceApi';
+
+	documentationUrl = 'huggingface';
+
+	properties: INodeProperties[] = [
+		{
+			displayName: 'API Key',
+			name: 'apiKey',
+			type: 'string',
+			typeOptions: { password: true },
+			required: true,
+			default: '',
+		},
+	];
+
+	authenticate: IAuthenticateGeneric = {
+		type: 'generic',
+		properties: {
+			headers: {
+				Authorization: '=Bearer {{$credentials.apiKey}}',
+			},
+		},
+	};
+
+	test: ICredentialTestRequest = {
+		request: {
+			baseURL: 'https://api-inference.huggingface.co',
+			url: '/models/gpt2',
+		},
+	};
+}

packages/@n8n/nodes-langchain/credentials/MotorheadApi.credentials.ts

@@ -0,0 +1,54 @@
+import type {
+	IAuthenticateGeneric,
+	ICredentialTestRequest,
+	ICredentialType,
+	INodeProperties,
+} from 'n8n-workflow';
+
+export class MotorheadApi implements ICredentialType {
+	name = 'motorheadApi';
+
+	displayName = 'MotorheadApi';
+
+	documentationUrl = 'motorhead';
+
+	properties: INodeProperties[] = [
+		{
+			displayName: 'Host',
+			name: 'host',
+			required: true,
+			type: 'string',
+			default: 'https://api.getmetal.io/v1',
+		},
+		{
+			displayName: 'API Key',
+			name: 'apiKey',
+			type: 'string',
+			typeOptions: { password: true },
+			required: true,
+			default: '',
+		},
+		{
+			displayName: 'Client ID',
+			name: 'clientId',
+			type: 'string',
+			default: '',
+		},
+	];
+
+	authenticate: IAuthenticateGeneric = {
+		type: 'generic',
+		properties: {
+			headers: {
+				'x-metal-client-id': '={{$credentials.clientId}}',
+				'x-metal-api-key': '={{$credentials.apiKey}}',
+			},
+		},
+	};
+
+	test: ICredentialTestRequest = {
+		request: {
+			baseURL: '={{$credentials.host}}/keys/current',
+		},
+	};
+}

packages/@n8n/nodes-langchain/credentials/OllamaApi.credentials.ts

@@ -0,0 +1,34 @@
+import type { ICredentialTestRequest, ICredentialType, INodeProperties } from 'n8n-workflow';
+
+export class OllamaApi implements ICredentialType {
+	name = 'ollamaApi';
+
+	displayName = 'Ollama';
+
+	documentationUrl = 'ollama';
+
+	properties: INodeProperties[] = [
+		{
+			displayName: 'Base URL',
+			name: 'baseUrl',
+			required: true,
+			type: 'string',
+			default: 'http://localhost:11434',
+		},
+	];
+
+	test: ICredentialTestRequest = {
+		request: {
+			baseURL: '={{ $credentials.baseUrl }}',
+			url: '/api/generate',
+			method: 'POST',
+			headers: {
+				'anthropic-version': '2023-06-01',
+			},
+			body: {
+				model: 'llama2',
+				prompt: 'Hello',
+			},
+		},
+	};
+}

packages/@n8n/nodes-langchain/credentials/PineconeApi.credentials.ts

@@ -0,0 +1,50 @@
+import type {
+	IAuthenticateGeneric,
+	ICredentialTestRequest,
+	ICredentialType,
+	INodeProperties,
+} from 'n8n-workflow';
+
+export class PineconeApi implements ICredentialType {
+	name = 'pineconeApi';
+
+	displayName = 'PineconeApi';
+
+	documentationUrl = 'pinecone';
+
+	properties: INodeProperties[] = [
+		{
+			displayName: 'API Key',
+			name: 'apiKey',
+			type: 'string',
+			typeOptions: { password: true },
+			required: true,
+			default: '',
+		},
+		{
+			displayName: 'Environment',
+			name: 'environment',
+			type: 'string',
+			required: true,
+			default: 'us-central1-gcp',
+		},
+	];
+
+	authenticate: IAuthenticateGeneric = {
+		type: 'generic',
+		properties: {
+			headers: {
+				'Api-Key': '={{$credentials.apiKey}}',
+			},
+		},
+	};
+
+	test: ICredentialTestRequest = {
+		request: {
+			baseURL: '=https://controller.{{$credentials.environment}}.pinecone.io/databases',
+			headers: {
+				accept: 'application/json; charset=utf-8',
+			},
+		},
+	};
+}

packages/@n8n/nodes-langchain/credentials/SerpApi.credentials.ts

@@ -0,0 +1,41 @@
+import type {
+	IAuthenticateGeneric,
+	ICredentialTestRequest,
+	ICredentialType,
+	INodeProperties,
+} from 'n8n-workflow';
+
+export class SerpApi implements ICredentialType {
+	name = 'serpApi';
+
+	displayName = 'SerpAPI';
+
+	documentationUrl = 'serpapi';
+
+	properties: INodeProperties[] = [
+		{
+			displayName: 'API Key',
+			name: 'apiKey',
+			type: 'string',
+			typeOptions: { password: true },
+			required: true,
+			default: '',
+		},
+	];
+
+	authenticate: IAuthenticateGeneric = {
+		type: 'generic',
+		properties: {
+			qs: {
+				api_key: '={{$credentials.apiKey}}',
+			},
+		},
+	};
+
+	test: ICredentialTestRequest = {
+		request: {
+			baseURL: 'https://serpapi.com',
+			url: '/account.json ',
+		},
+	};
+}

packages/@n8n/nodes-langchain/credentials/WolframAlphaApi.credentials.ts

@@ -0,0 +1,45 @@
+import type {
+	IAuthenticateGeneric,
+	ICredentialTestRequest,
+	ICredentialType,
+	INodeProperties,
+} from 'n8n-workflow';
+
+export class WolframAlphaApi implements ICredentialType {
+	name = 'wolframAlphaApi';
+
+	displayName = 'WolframAlphaApi';
+
+	documentationUrl = 'wolframalpha';
+
+	properties: INodeProperties[] = [
+		{
+			displayName: 'App ID',
+			name: 'appId',
+			type: 'string',
+			typeOptions: { password: true },
+			required: true,
+			default: '',
+		},
+	];
+
+	authenticate: IAuthenticateGeneric = {
+		type: 'generic',
+		properties: {
+			qs: {
+				api_key: '={{$credentials.appId}}',
+			},
+		},
+	};
+
+	test: ICredentialTestRequest = {
+		request: {
+			baseURL: 'https://api.wolframalpha.com/v1',
+			url: '=/simple',
+			qs: {
+				i: 'How much is 1 1',
+				appid: '={{$credentials.appId}}',
+			},
+		},
+	};
+}

packages/@n8n/nodes-langchain/credentials/XataApi.credentials.ts

@@ -0,0 +1,55 @@
+import type {
+	IAuthenticateGeneric,
+	ICredentialTestRequest,
+	ICredentialType,
+	INodeProperties,
+} from 'n8n-workflow';
+
+export class XataApi implements ICredentialType {
+	name = 'xataApi';
+
+	displayName = 'Xata Api';
+
+	documentationUrl = 'xata';
+
+	properties: INodeProperties[] = [
+		{
+			displayName: 'Database Endpoint',
+			name: 'databaseEndpoint',
+			required: true,
+			type: 'string',
+			default: '',
+			placeholder: 'https://{workspace}.{region}.xata.sh/db/{database}',
+		},
+		{
+			displayName: 'Branch',
+			name: 'branch',
+			required: true,
+			type: 'string',
+			default: 'main',
+		},
+		{
+			displayName: 'API Key',
+			name: 'apiKey',
+			type: 'string',
+			typeOptions: { password: true },
+			required: true,
+			default: '',
+		},
+	];
+
+	authenticate: IAuthenticateGeneric = {
+		type: 'generic',
+		properties: {
+			headers: {
+				Authorization: '=Bearer {{$credentials.apiKey}}',
+			},
+		},
+	};
+
+	test: ICredentialTestRequest = {
+		request: {
+			baseURL: '={{$credentials.databaseEndpoint}}:{{$credentials.branch}}',
+		},
+	};
+}

packages/@n8n/nodes-langchain/credentials/ZepApi.credentials.ts

@@ -0,0 +1,48 @@
+import type {
+	IAuthenticateGeneric,
+	ICredentialTestRequest,
+	ICredentialType,
+	INodeProperties,
+} from 'n8n-workflow';
+
+export class ZepApi implements ICredentialType {
+	name = 'zepApi';
+
+	displayName = 'Zep Api';
+
+	documentationUrl = 'zep';
+
+	properties: INodeProperties[] = [
+		{
+			displayName: 'API URL',
+			name: 'apiUrl',
+			required: true,
+			type: 'string',
+			default: 'http://localhost:8000',
+		},
+		{
+			displayName: 'API Key',
+			name: 'apiKey',
+			type: 'string',
+			typeOptions: { password: true },
+			required: false,
+			default: '',
+		},
+	];
+
+	authenticate: IAuthenticateGeneric = {
+		type: 'generic',
+		properties: {
+			headers: {
+				Authorization: '={{$credentials.apiKey ? "Bearer " + $credentials.apiKey : undefined }}',
+			},
+		},
+	};
+
+	test: ICredentialTestRequest = {
+		request: {
+			baseURL: '={{$credentials.apiUrl}}',
+			url: '/api/v1/collection',
+		},
+	};
+}